阅读说明：本技术 一种矩形顶管机的分时迁移空间姿态微调纠偏方法 (Time-sharing migration space attitude fine-adjustment deviation-rectifying method of rectangular pipe jacking machine ) 是由 翟华 孔卓 丁煦 张文兵 吕庆洲 辛瀚文 唐飞 于 2021-09-18 设计创作，主要内容包括：本发明涉及矩形顶管机控制领域,特别是涉及一种矩形顶管机的分时迁移空间姿态微调纠偏方法。包括如下步骤：S1：实时获取矩形顶管机的当前姿态信息；S2：根据当前姿态信息计算矩形顶管实时的位置偏差；S3：通过矩形顶管机的运动学简化模型计算各组纠偏组件的目标伸缩状态；S4：计算出当前工作区间内的环境系数；S5：获取当前工作区间内环境允许伸缩量；S6：通过分时迁移微顶法计算各组纠偏组件每次纠偏动作的实际伸缩量；S7：在推进油缸每向前顶进一个预设的顶进单元时,控制纠偏组件执行一次纠偏动作,直至矩形顶管机重新回到预设轴线。本发明解决了现有矩形顶管机轨迹控制方法存在对复杂工况的适应性不足,纠偏效果差,纠偏不及时等问题。(The invention relates to the field of rectangular push bench control, in particular to a time-sharing migration space attitude fine-tuning deviation rectifying method for a rectangular push bench. The method comprises the following steps: s1: acquiring current attitude information of the rectangular pipe jacking machine in real time; s2: calculating the real-time position deviation of the rectangular jacking pipe according to the current attitude information; s3: calculating the target stretching state of each group of deviation rectifying assemblies through a kinematic simplified model of the rectangular pipe push bench; s4: calculating an environment coefficient in the current working interval; s5: obtaining the allowable expansion amount of the environment in the current working interval; s6: calculating the actual stretching amount of each group of deviation rectifying components in each deviation rectifying action by a time-sharing migration micro-jacking method; s7: and when the pushing oil cylinder pushes a preset pushing unit forwards, controlling the deviation rectifying assembly to perform a deviation rectifying action until the rectangular pipe jacking machine returns to the preset axis again. The invention solves the problems of insufficient adaptability to complex working conditions, poor deviation rectifying effect, untimely deviation rectification and the like of the conventional rectangular pipe jacking machine trajectory control method.)

1. A time-sharing migration space attitude fine-tuning deviation-rectifying method of a rectangular push bench is used for carrying out real-time-sharing migration adjustment on the attitude of the rectangular push bench when a jacking track of the push bench is deviated from a preset axis; the method is characterized by comprising the following steps:

s1: acquiring current attitude information of the rectangular pipe jacking machine in real time according to a preset sampling frequency;

s2: calculating the real-time position deviation P of the rectangular jacking pipe according to the current attitude information;

s3: calculating the target telescopic state delta l of each group of deviation rectifying assemblies through a kinematic simplified model of the rectangular push bench according to the position deviation P_i(ii) a The deviation rectifying assembly adopts a deviation rectifying oil cylinder as an actuating mechanism;

s4: obtaining the environmental state information of the rectangular pipe push bench under the current working condition, and calculating the environmental state information in the current working intervalCoefficient of environment A_{Ring (C)}；

S5: according to the environmental coefficient A_{Ring (C)}Acquiring the environment allowable expansion amount A of the deviation correcting oil cylinder in the current working interval by a table look-up method;

s6: reading the target telescopic state delta l of the deviation-correcting oil cylinders in each group of deviation-correcting assemblies_iAnd the environment allowable expansion amount A of the current working interval, and calculating the actual expansion amount l of each group of deviation correcting components in each deviation correcting action by a time-sharing migration micro-jacking method_Ri；

S7: when the pushing oil cylinder of the rectangular push bench jacks a preset jacking unit forwards, controlling the deviation rectifying oil cylinders in each group of deviation rectifying assemblies to execute a deviation rectifying action until the rectangular push bench returns to the preset axis again; wherein, each deviation-correcting oil cylinder completes corresponding actual expansion amount l in the deviation-correcting action_RiIs performed.

2. The time-sharing migration space attitude fine-adjustment deviation-rectifying method of the rectangular push bench according to claim 1, characterized in that: in step S1, the current posture information includes a pitch angle α, an azimuth angle β, and a roll angle θ of the rectangular push bench.

3. The time-sharing migration space attitude fine-adjustment deviation-rectifying method of the rectangular push bench according to claim 2, characterized in that: step S2, wherein the position deviation P comprises a horizontal deviation B, a vertical deviation C and a rollover angle gamma; the respective calculation formulas are as follows:

B＝L·tanα，

C＝L·tanβ，

γ＝θ

the horizontal deviation B represents the horizontal distance between the center of the machine head of the rectangular pipe push bench and the preset axis; the vertical deviation C represents the vertical distance between the center of the machine head of the rectangular pipe push bench and the preset axis; gamma is the angle of the head of the push bench turned over along the axis; and L represents the distance from the center of the tail end of the cylinder body of the rectangular push bench to the center of the machine head.

4. According to claim3 the time-sharing migration space attitude fine-tuning deviation-rectifying method of the rectangular push bench is characterized in that: in step S3, the target telescopic state delta l of the deviation-correcting oil cylinders in each group of deviation-correcting assemblies_iThe calculation method of (2) is as follows:

s31: simplifying the rectangular push bench into a kinematic model of an 8-UPU parallel mechanism; a machine head part is used as a movable platform, a cylinder body is used as a static platform, and a space rectangular coordinate system is established; wherein Q-XYZ is a moving platform coordinate system, and O-XYZ is a static platform coordinate system;

s32: acquiring the position deviation P, and solving the deviation-corrected target posture W' of the rectangular push bench by adopting the following formula under the established coordinate system:

wherein, W₀In order to move the initial coordinates of the platform,is an angle rotation matrix, P is a position deviation, and satisfies:

s33: defining the coordinate of the hinge on the deviation rectifying oil cylinder in the target posture W' as (X)_bi，Y_bi，Z_bi) The coordinate of the lower hinge is set as (x)_ai，y_ai，z_ai) The distance l between the upper hinge and the lower hinge of the deviation-correcting oil cylinder_iCalculated by the following formula:

wherein (X)_bi，Y_bi，Z_bi) On the moving platform coordinate system, (x)_ai，y_ai，z_ai) On a stationary platform coordinate system;

s34: according to the initial length l of the deviation-correcting oil cylinder₀And the distance l between the upper hinge and the lower hinge of each group of the deviation-rectifying oil cylinders_iCalculating the target telescopic state delta l of each group of the deviation-rectifying oil cylinders_iThe calculation formula is as follows:

Δl_i＝l_i-l₀；

wherein,. DELTA.l_iWhen the deviation is more than 0, the characteristic deviation rectifying oil cylinder should extend by delta l_iWhen the deviation correcting oil cylinder is less than 0, the characteristic deviation correcting oil cylinder should be shortened.

5. The time-sharing migration space attitude fine-adjustment deviation-rectifying method of the rectangular push bench according to claim 4, characterized in that: in step S4, the environmental status information includes: soil complexity ρ of construction site_{Soil for soil}Water complexity rho of construction site_{Water (W)}And the characteristic value P of the loading condition of the rectangular pipe jacking machine during construction_Carrier；

The environmental coefficient A_{Ring (C)}The calculation formula of (a) is as follows:

wherein k is₁Representing the soil complexity ρ_{Soil for soil}The weighting coefficient of (2); k is a radical of₂Representing the water complexity ρ_{Water (W)}The weighting coefficient of (2); k is a radical of₃Characteristic value P representing the loading condition_CarrierThe weighting coefficient of (2).

6. The time-sharing migration space attitude fine-adjustment deviation-rectifying method of the rectangular push bench according to claim 5, characterized in that: in step S5, the environment allowable expansion amount a and the environment coefficient a are established based on expert experience_{Ring (C)}The mapping relationship between the two; obtaining a relation comparison table representing the corresponding relation of the two; in the relation comparison table, the environment allowable expansion amount A is at least divided into seven levels, and the environment coefficient A_{Ring (C)}Is divided into a corresponding number of sub-intervals when the environment coefficient A is smaller than the threshold value_{Ring (C)}Respectively corresponding to only one of the different intervalsThe environment of one allows for the value of the amount of scaling a.

7. The time-sharing migration space attitude fine-adjustment deviation-rectifying method of the rectangular push bench according to claim 6, characterized in that: in step S6, the actual amount of expansion/contraction of each deviation rectifying action_RiThe calculation process of (2) is as follows:

s61: according to the target telescopic state delta l of the deviation-rectifying oil cylinders in each group of deviation-rectifying assemblies_iAnd the current actual state l of the oil cylinder, and calculating the target expansion amount l required to be finished when each group of deviation rectifying assemblies are rectified_siThe calculation formula is as follows:

l_si＝Δl_i-l；

s62: acquiring target expansion amount l in each group of deviation correcting assemblies_siIs recorded as the maximum target expansion/contraction quantity l_smax；

S63: acquiring environment allowable expansion amount A under the current working condition; comparing the environment allowable expansion amount A with the maximum target expansion amount l_smaxMake the following decision:

(1) when l_smaxWhen | < A, the actual extension amount l of each group of deviation-correcting components in each deviation-correcting action_RiEqual to the calculated target expansion/contraction amount l_si；

(2) When l_smaxIf | is greater than A, the target deviation correction amount l is in each deviation correction action_siActual extension amount l of maximum deviation-correcting oil cylinder_RiA is equal to A, the other groups of deviation rectifying components are stretched in proportion, and the actual stretching amount l of each group of deviation rectifying components_RiSatisfies the following formula:

8. the time-sharing migration space attitude fine-adjustment deviation-rectifying method of the rectangular push bench according to claim 1, characterized in that: in step S3, the target expansion/contraction status Δ l of each set of deviation correcting assemblies is calculated_iThen, the target expansion and contraction state delta l is also set_iTheory of corresponding correction oil cylindersComparing the travel ranges; when the target telescopic state delta l of a certain group of deviation rectifying assemblies_iAnd when the theoretical stroke range of the corresponding deviation-rectifying oil cylinder is exceeded, the rectangular push bench stops the execution of the subsequent steps and sends an alarm signal.

9. The time-sharing migration space attitude fine-adjustment deviation-rectifying method of the rectangular push bench according to claim 1, characterized in that: in step S7, the advance distance of each preset advance unit that the advance cylinder advances forward is 100 mm.

10. The time-sharing migration space attitude fine-adjustment deviation-rectifying method of the rectangular push bench according to claim 1, characterized in that: in the rectangular push bench, the number of the oil cylinders of each group of deviation rectifying assemblies is two, and the two are defined as a main jacking oil cylinder J_{Master and slave}And a following cylinder J_{Next time}In step S7, each set of deviation correcting components executes each deviation correcting action by using a multi-cylinder synchronization strategy; the execution method of the multi-cylinder synchronization strategy comprises the following steps:

obtaining the main jacking oil cylinder J_{Master and slave}Amount of expansion S_{Master and slave}And the following oil cylinder J_{Next time}Amount of expansion S_{Next time}；

Calculating the main jacking oil cylinder J_{Master and slave}And the following oil cylinder J_{Next time}The difference in displacement of the amount of expansion and contraction Δ S, Δ S ═ S_{Master and slave}-S_{Next time}；

In the jacking process of each group of deviation rectifying assemblies, making the following decision according to the displacement difference delta S so as to enable the main jacking oil cylinder J_{Master and slave}And the following oil cylinder J_{Next time}The jacking state of (2) is kept synchronous:

(1) if delta S is larger than 0.05mm, the following oil cylinder J is increased_{Next time}The cylinder is hydraulic, and the lifting following cylinder J_{Next time}The jacking speed of (2);

(2) if delta S is less than 0.05mm, the following oil cylinder J is reduced_{Next time}The cylinder hydraulic pressure of and the following cylinder J is reduced_{Next time}The jacking speed of (2).

Technical Field

The invention relates to the field of rectangular push bench control, in particular to a time-sharing migration space attitude fine-tuning deviation rectifying method for a rectangular push bench.

Background

The pipe jacking machine is tunnel excavation equipment, the rectangular pipe jacking machine is a pipe jacking machine with a rectangular forming section, and the rectangular pipe jacking machine has the characteristics of short construction time and small influence on the surrounding environment of a project; and under the same cross section, the rectangular jacking pipe can utilize underground space more effectively than the circular jacking pipe, and the cross section utilization rate is high. At present, more and more rectangular jacking pipes are applied to the construction of underground engineering.

In the tunneling process of the rectangular pipe jacking machine, due to the influences of factors such as complex and variable geological environment, uneven thrust, uneven tail shield gap and the like; the tunneling direction of the rectangular pipe jacking machine is easy to deflect, and further deviation is generated between the axis of the actual tunneling track of the rectangular pipe jacking machine and the preset axis. The pipe jacking machine is usually provided with a deviation rectifying cylinder to correct deviation in the tunneling process. In an actual operation environment, factors influencing the tunneling posture of the jacking pipe are many, and the factors are mutually coupled and have the characteristics of nonlinearity, time-varying property and fuzzy randomness; the telescopic amount of the deviation-rectifying oil cylinder also presents the time-varying characteristic, the pipe jacking machine cannot realize the tunneling according to the set deviation-rectifying track, the deviation-rectifying difficulty is high, and the jacking track is difficult to control.

The common push bench jacking track control methods mainly include the following two methods: according to the current deviation posture of the push bench, designing a deviation rectifying track of the push bench by a polynomial fitting method, following the characteristic of the fitting track, distributing the pressure of the oil cylinder, and controlling the jacking track of the push bench. Based on fuzzy control or neural network control, according to construction experience, the deviation rectification amount of the pipe jacking machine or the hydraulic value of the oil cylinder is taken as a controlled object, a deviation rectification rule is established, and a neural network controller or a fuzzy controller for axis deviation rectification is obtained. However, the method is based on geometric fitting or construction experience, the considered influence deviation correction factor is one-sided, the influence of land settlement and soil disturbance on the tunneling process of the pipe jacking machine in the pipe jacking deviation correction process is not considered, the phenomena of over-correction and less correction are easily caused, and the actual application effect of the method is poor.

Disclosure of Invention

Based on the above, the problems of insufficient adaptability to complex working conditions, poor deviation rectifying effect, untimely deviation rectification and the like existing in the conventional rectangular pipe jacking machine trajectory control method are necessarily solved; provides a time-sharing migration space attitude fine-tuning deviation rectifying method for a rectangular push bench.

The invention provides a time-sharing migration space attitude fine-tuning and deviation-rectifying method for a rectangular push bench, which is mainly used for performing real-time-sharing migration adjustment on the attitude of the rectangular push bench when the jacking track of the push bench deviates from the position of a preset axis. The method can correct the deviation more timely, and the track control of the rectangular push bench is more accurate. The deviation rectifying method of the time-sharing migration space attitude fine-tuning deviation rectifying rectangular push bench comprises the following steps:

s1: and acquiring the current attitude information of the rectangular push bench in real time according to a preset sampling frequency.

S2: and calculating the real-time position deviation P of the rectangular jacking pipe according to the current attitude information.

S3: according to the position deviation P, calculating the target telescopic state delta l of each group of deviation rectifying assemblies through a kinematic simplified model of the rectangular push bench_i(ii) a The deviation rectifying assembly adopts a deviation rectifying oil cylinder as an actuating mechanism.

S4: obtaining the environmental state information of the rectangular pipe push bench under the current working condition, and calculating the environmental coefficient A in the current working interval_{Ring (C)}。

S5: according to the environmental coefficient A_{Ring (C)}And obtaining the environment allowable expansion amount A of the deviation-correcting oil cylinder in the current working interval by a table look-up method.

S6: reading the target telescopic state delta l of the deviation-correcting oil cylinders in each group of deviation-correcting assemblies_iAnd the allowable expansion amount A of the environment in the current working interval, and the actual expansion amount l of each group of deviation correcting components in each deviation correcting action is calculated by a time-sharing migration micro-jacking method_Ri。

S7: when the pushing oil cylinder of the rectangular pipe jacking machine jacks a preset jacking unit forwards, each group of deviation rectifying units is controlledA deviation rectifying oil cylinder in the assembly performs a deviation rectifying action until the rectangular pipe jacking machine returns to the preset axis again; wherein, each deviation-correcting oil cylinder completes corresponding actual expansion amount l in the deviation-correcting action_RiIs performed.

Preferably, the current attitude information includes a pitch angle α, an azimuth angle β, and a roll angle θ of the rectangular push bench.

Preferably, the positional deviation P includes a horizontal deviation B, a vertical deviation C, and a rollover angle γ; the respective calculation formulas are as follows:

B＝L·tanα，

C＝L·tanβ，

γ＝θ

the horizontal deviation B represents the horizontal distance between the center of the machine head of the rectangular pipe push bench and a preset axis; the vertical deviation C represents the vertical distance between the center of the machine head of the rectangular pipe push bench and a preset axis; gamma is the angle of the head of the push bench turned over along the axis; l represents the distance from the center of the tail end of the cylinder body of the rectangular push bench to the center of the head.

Preferably, the target expansion and contraction state delta l of each group of deviation rectifying assemblies_iThe calculation method of (2) is as follows:

s31: simplifying the rectangular push bench into a kinematic model of an 8-UPU parallel mechanism; a machine head part is used as a movable platform, a cylinder body is used as a static platform, and a space rectangular coordinate system is established; wherein Q-XYZ is a moving platform coordinate system, and O-XYZ is a static platform coordinate system.

S32: acquiring real-time position deviation P, and solving the deviation-corrected target posture W' of the rectangular push bench by adopting the following formula under the established coordinate system:

wherein, W₀In order to move the initial coordinates of the platform,is an angle rotation matrix, P is a position deviation, and satisfies:

s33: defining the coordinate of the hinge on the deviation rectifying oil cylinder in the target posture W' as (X)_bi，Y_bi，Z_bi) The coordinate of the lower hinge is set as (x)_ai，y_ai，z_ai) The distance l between the upper hinge and the lower hinge of the correction oil cylinder_iCalculated by the following formula:

wherein (X)_bi，Y_bi，Z_bi) On the moving platform coordinate system, (x)_ai，y_ai，z_ai) On a stationary platform coordinate system.

S34: according to the initial length l of the deviation-rectifying oil cylinder in each group of deviation-rectifying components₀And the distance l between the upper hinge and the lower hinge of each group of correction oil cylinders_iCalculating the target telescopic state delta l of each group of the deviation-rectifying oil cylinders_iThe calculation formula is as follows:

Δl_i＝l_i-l₀；

wherein,. DELTA.l_iWhen the deviation is more than 0, the characteristic deviation rectifying oil cylinder should extend by delta l_iWhen the deviation correcting oil cylinder is less than 0, the characteristic deviation correcting oil cylinder should be shortened.

Preferably, the environmental status information includes: soil complexity ρ of construction site_{Soil for soil}Water complexity rho of construction site_{Water (W)}And characteristic value P of loading condition of rectangular pipe jacking machine during construction_Carrier；

Coefficient of environment A_{Ring (C)}The calculation formula of (a) is as follows:

wherein k is₁Representing soil complexity ρ_{Soil for soil}The weighting coefficient of (2); k is a radical of₂Representing water complexity ρ_{Water (W)}The weighting coefficient of (2); k is a radical of₃Characteristic value representing loaded conditionP_CarrierThe weighting coefficient of (2).

Preferably, the invention establishes the environment allowable expansion amount A and the environment coefficient A according to expert experience_{Ring (C)}The mapping relationship between the two; obtaining a relation comparison table representing the corresponding relation between the two, wherein the environment allowable expansion amount A is divided into at least seven levels in the relation comparison table, and the environment coefficient A_{Ring (C)}Is divided into a corresponding number of sub-intervals, when the environment coefficient A is_{Ring (C)}And when the data are positioned in different intervals, the data correspond to the value of the allowable expansion and contraction quantity A of the unique environment respectively.

Preferably, the actual expansion/contraction amount l of each deviation rectifying action_RiThe calculation process of (2) is as follows:

s61: according to the target telescopic state delta l of each group of deviation rectifying assemblies_iAnd the current actual state l of the oil cylinder, and calculating the target expansion amount l required to be finished when each group of deviation rectifying assemblies are rectified_siThe calculation formula is as follows:

l_si＝Δl_i-l；

s62: acquiring target expansion amount l in each group of deviation correcting assemblies_siIs recorded as the maximum target expansion/contraction quantity l_smax；

S63: acquiring environment allowable expansion amount A under the current working condition; comparing the environment allowable expansion amount A with the maximum target expansion amount l_smaxMake the following decision:

(1) when l_smaxWhen | < A, the actual extension amount l of each group of deviation-correcting components in each deviation-correcting action_RiEqual to the calculated target expansion/contraction amount l_si；

(2) When l_smaxIf | is greater than A, the target deviation correction amount l is in each deviation correction action_siActual extension amount l of maximum deviation-correcting oil cylinder_RiA is equal to A, the other groups of deviation rectifying components are stretched in proportion, and the actual stretching amount l of each group of deviation rectifying components_RiSatisfies the following formula:

preferably, in step S3, the targets of the sets of deviation rectifying components are calculatedExpansion state Deltal_iThen, the target expansion and contraction state delta l is also set_iAnd comparing the theoretical stroke ranges of the corresponding groups of deviation rectifying oil cylinders. When the target extension state delta l of a certain group of deviation rectifying components_iAnd when the theoretical stroke range of the corresponding deviation-correcting oil cylinder is exceeded, the rectangular push bench stops the execution of the subsequent steps and sends an alarm signal.

Preferably, in step S7, the advance distance of each preset advance unit that the advance cylinder advances forward is 100 mm.

Preferably, in the rectangular push bench, the number of the cylinders of each group of deviation rectifying assemblies is two, and the two are defined as the main jacking cylinders J_{Master and slave}And a following cylinder J_{Next time}In step S7, each set of deviation correcting components executes each deviation correcting action by using a multi-cylinder synchronization strategy; the execution method of the multi-cylinder synchronization strategy comprises the following steps:

obtaining a main jacking cylinder J_{Master and slave}Amount of expansion S_{Master and slave}And a following cylinder J_{Next time}Amount of expansion S_{Next time}。

Calculating the main jacking oil cylinder J_{Master and slave}And a following cylinder J_{Next time}The difference in displacement of the amount of expansion and contraction Δ S, Δ S ═ S_{Master and slave}-S_{Next time}；

In the jacking process of each group of deviation rectifying assemblies, the following decision is made according to the displacement difference delta S so that the main jacking oil cylinder J_{Master and slave}And a following cylinder J_{Next time}The jacking state of (2) is kept synchronous:

(1) if delta S is larger than 0.05mm, the following oil cylinder J is increased_{Next time}The cylinder is hydraulic, and the lifting following cylinder J_{Next time}The jacking speed of (2);

(2) if delta S is less than 0.05mm, the following oil cylinder J is reduced_{Next time}The cylinder hydraulic pressure of and the following cylinder J is reduced_{Next time}The jacking speed of (2).

The time-sharing migration space attitude fine-tuning deviation-rectifying method of the rectangular push bench provided by the invention has the following beneficial effects:

1. the method simplifies the model of the deviation correcting system into the model of the parallel mechanism, further realizes the inverse solution of the target stretching state of the deviation correcting oil cylinder by utilizing kinematics, and the obtained calculation result has high accuracy and good reliability, thereby laying a foundation for accurately controlling the posture of the rectangular pipe jacking machine in the later period.

2. The invention considers the working environment factors of the rectangular push bench, introduces the environment coefficient, combines the water and soil complexity of the construction section and the loading condition of the push bench during construction, divides the jacking process of the deviation-correcting oil cylinder into a plurality of sections, and adopts a time-sharing migration space attitude fine-tuning deviation-correcting method to control the jacking track of the rectangular push bench in real time by a method for continuously updating the deviation-correcting track. Therefore, the method has good environmental adaptability and small error of the jacking track.

3. The two deviation rectifying oil cylinders in the rectangular push bench are used as a group of deviation rectifying assemblies to be synchronously pushed, so that the jacking force of the oil cylinders is increased, the rigidity and the stability of a deviation rectifying structure are improved, the jacking amount of the oil cylinders is considered in combination with environmental factors, the phenomenon that the oil cylinders are overloaded due to excessive jacking at one time is prevented, and the safety is better.

Drawings

Fig. 1 is a flowchart of a time-sharing migration space attitude fine-tuning deviation-correcting method for a rectangular push bench provided in embodiment 1 of the present invention;

FIG. 2 is a flowchart of a method for calculating an actual amount of stretch of each deviation rectifying action by a time-sharing migration micro-jacking method in embodiment 1 of the present invention;

FIG. 3 is a flowchart illustrating steps of a method for implementing a multi-cylinder synchronization strategy according to embodiment 1 of the present invention;

FIG. 4 is a schematic diagram of the state change during the deviation rectification of the rectangular push bench in embodiment 1 of the present invention;

FIG. 5 is a schematic structural diagram of a rectangular push bench for time-sharing migration spatial attitude fine tuning and deviation rectification provided in embodiment 2 of the present invention;

FIG. 6 is a schematic mechanism diagram of a head part in a time-sharing migration space attitude fine-tuning deviation-correcting rectangular push bench according to embodiment 2 of the present invention;

FIG. 7 is a schematic diagram showing the position distribution of the deviation-correcting oil cylinders in the rectangular push bench in embodiment 2 of the present invention;

FIG. 8 is a schematic view of a loaded condition of a head part of a rectangular pipe pushing jack in underground space construction according to embodiment 2 of the present invention;

FIG. 9 is a schematic block diagram of a time-sharing migration rectangular push bench control part for dynamic deviation rectification provided in embodiment 2 of the present invention;

FIG. 10 is a schematic view showing a conversion geometry of the positional deviation in example 2 of the present invention;

FIG. 11 is a flow chart of the operation process of the time-sharing migration spatial attitude fine-tuning deviation-correcting rectangular push bench in embodiment 2 of the present invention;

FIG. 12 is a schematic structural diagram of a time-sharing migration spatial attitude fine-tuning deviation-correcting rectangular push bench provided in embodiment 3 of the present invention;

labeled as:

1. a machine head; 2. a barrel body; 4. a deviation rectifying oil cylinder; 5. jacking the oil cylinder; 6. a displacement sensor; 7. a pose measurement module; 8. a working condition detection module; 9. a hydraulic pump station; 10. a data processing module; 11. a control module; 12. an alarm module; 13. a communication module; 14. a server; 41. a main jacking oil cylinder; 42. a following oil cylinder; 101. a positional deviation calculation unit; 102. a target expansion state calculation unit; 103. an environment allowable stretch amount calculation unit; 104. an actual expansion amount generation unit; 105. a storage unit; 111. a jacking control unit; 112. and a deviation rectifying control unit.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

Example 1

The embodiment provides a time-sharing migration space attitude fine-tuning deviation-rectifying method for a rectangular push bench, which is mainly used for performing real-time-sharing migration adjustment on the attitude of the rectangular push bench when the actual jacking track of the push bench deviates from the position of a preset axis. As shown in fig. 1, the deviation rectifying method of the time-sharing migration spatial attitude fine tuning deviation rectifying rectangular push bench in the embodiment includes the following steps:

s1: and acquiring the current attitude information of the rectangular push bench in real time according to a preset sampling frequency. The current attitude information includes a pitch angle α, an azimuth angle β, and a roll angle θ of the rectangular push bench.

S2: and calculating the real-time position deviation P of the rectangular jacking pipe according to the current attitude information. The positional deviation P includes a horizontal deviation B, a vertical deviation C, and a rollover angle γ. The respective calculation formulas are as follows:

B＝L·tanα，

C＝L·tanβ，

γ＝θ

in the above formula, the horizontal deviation B represents the horizontal distance between the center of the head of the rectangular push bench and the preset axis; the vertical deviation C represents the vertical distance between the center of the machine head of the rectangular pipe push bench and a preset axis; gamma is the angle of the head of the push bench turned over along the axis; l represents the distance from the center of the tail end of the cylinder body of the rectangular push bench to the center of the head.

S3: according to the position deviation P, calculating the target telescopic state delta l of each group of deviation rectifying assemblies through a kinematic simplified model of the rectangular push bench_i. An actuating mechanism in the deviation rectifying assembly is a deviation rectifying oil cylinder. Calculating the target telescopic state delta l of each group of deviation rectifying assemblies_iThen, the target expansion and contraction state delta l is also set_iComparing the theoretical stroke range with the theoretical stroke range of the corresponding deviation-rectifying oil cylinder; when the target extension state delta l of a certain group of deviation rectifying components_iAnd when the theoretical stroke range of the corresponding deviation-correcting oil cylinder is exceeded, the rectangular push bench stops the execution of the subsequent steps and sends an alarm signal.

In this embodiment, the target expansion state Δ l of each set of deviation rectifying assemblies_iThe calculation method of (2) is as follows:

s31: simplifying the rectangular pipe jacking machine into a kinematic model of an 8-UPU parallel mechanism; a machine head part is used as a movable platform, a cylinder body is used as a static platform, and a space rectangular coordinate system is established; wherein, P-XYZ is a moving platform coordinate system, and O-XYZ is a static platform coordinate system.

S32: obtaining a real-time position deviation P, and solving a target posture W' of deviation rectification of the rectangular push bench by adopting the following formula:

wherein, W₀In order to move the initial coordinates of the platform,is an angle rotation matrix, P is a position deviation, and satisfies:

s33: defining the coordinate of the hinge on the deviation rectifying oil cylinder in the target posture W' as (X)_bi，Y_bi，Z_bi) The coordinate of the lower hinge is set as (x)_ai，y_ai，z_ai) The distance l between the upper hinge and the lower hinge of the correction oil cylinder_iCalculated by the following formula:

wherein (X)_bi，Y_bi，Z_bi) On the moving platform coordinate system, (x)_ai，y_ai，z_ai) On a stationary platform coordinate system.

S34: according to the initial length l of each group of deviation rectifying components₀And the distance l between the upper hinge and the lower hinge of each group of deviation rectifying components_iCalculating the target telescopic state delta l of each group of deviation rectifying assemblies_iThe calculation formula is as follows:

Δl_i＝l_i-l₀。

wherein,. DELTA.l_iWhen the deviation is more than 0, the characteristic deviation rectifying oil cylinder should extend by delta l_iWhen the deviation correcting oil cylinder is less than 0, the characteristic deviation correcting oil cylinder should be shortened.

S4: obtaining the environmental state information of the rectangular pipe push bench under the current working condition, and calculating the environmental coefficient A in the current working interval_{Ring (C)}。

Wherein the environmental status information includes: soil complexity ρ of construction site_{Soil for soil}Water complexity rho of construction site_{Water (W)}And characteristic value P of loading condition of rectangular pipe jacking machine during construction_Carrier。

Coefficient of environment A_{Ring (C)}The calculation formula of (a) is as follows:

wherein k is₁Representing soil complexity ρ_{Soil for soil}The weighting coefficient of (2); k is a radical of₂Representing water complexity ρ_{Water (W)}The weighting coefficient of (2); k is a radical of₃Characteristic value P representing the loading condition_CarrierThe weighting coefficient of (2).

S5: according to the environmental coefficient A_{Ring (C)}And obtaining the allowable expansion amount A of the environment in the current working interval by a table look-up method. Establishing environment allowable expansion amount A and environment coefficient A according to expert experience_{Ring (C)}The mapping relationship between them. And obtaining a relation comparison table for representing the corresponding relation of the two. In the relation comparison table, the environment allowable expansion amount A is at least divided into seven levels, and the environment coefficient A_{Ring (C)}When the values of (A) are located in different intervals, the values of the allowable expansion and contraction quantity A of a certain level of environment are respectively unique.

S6: reading the target expansion state delta l of each group of deviation rectifying assemblies_iAnd the allowable expansion amount A of the environment in the current working interval, and the actual expansion amount l of each group of deviation correcting components in each deviation correcting action is calculated by a time-sharing migration micro-jacking method_Ri. As shown in FIG. 2, in the time-sharing migration micro-jacking method, the actual amount of expansion/contraction/of each deviation rectifying action_RiThe calculation process of (2) is as follows:

s61: according to the target telescopic state delta l of each group of deviation rectifying assemblies_iAnd the current actual state l of the oil cylinder,calculating the target expansion amount l required to be completed when each group of deviation rectifying components is rectified_siThe calculation formula is as follows:

l_si＝Δl_i-l。

s62: acquiring target expansion amount l in each group of deviation correcting assemblies_siIs recorded as the maximum target expansion/contraction quantity l_smax。

S63: acquiring environment allowable expansion amount A under the current working condition; comparing environment allowable expansion amount A with maximum target expansion amount l_smaxMake the following decision:

(1) when l_smaxWhen | < A, in each deviation rectifying action, the actual extension amount l of each group of deviation rectifying components_RiEqual to the calculated target expansion/contraction amount l_si。

(2) When l_smaxWhen | is greater than A, the target deviation correction amount l is in each deviation correction action_siActual extension amount l of maximum deviation-correcting oil cylinder_RiA is equal to A, the other groups of deviation rectifying components are stretched in proportion, and the actual stretching amount l of each group of deviation rectifying components_RiSatisfies the following formula:

s7: and when the pushing oil cylinder of the rectangular push bench pushes a preset pushing unit forwards, controlling each group of deviation rectifying assemblies to execute a deviation rectifying action until the rectangular push bench returns to the preset axis again. Wherein, each group of deviation rectifying components completes corresponding actual expansion amount l in the deviation rectifying action_RiIs performed.

In this embodiment, the propelling distance of each preset propelling unit that the propelling cylinder propels forward is 100 mm. In the rectangular pipe jacking machine, the number of oil cylinders of each group of deviation rectifying assemblies is two, and the two are defined as a main jacking oil cylinder J_{Master and slave}And a following cylinder J_{Next time}. Each group of deviation rectifying components adopts a multi-cylinder synchronization strategy to execute each deviation rectifying action; as shown in fig. 3, the multi-cylinder synchronization strategy is executed as follows:

(1) obtaining a main jacking cylinder J_{Master and slave}Amount of expansion S_{Master and slave}And a following cylinder J_{Next time}Amount of expansion S_{Next time}。

(2) Calculating the main jacking oil cylinder J_{Master and slave}And a following cylinder J_{Next time}The difference in displacement of the amount of expansion and contraction Δ S, Δ S ═ S_{Master and slave}-S_{Next time}。

(3) In the jacking process of each group of deviation rectifying assemblies, the following decision is made according to the displacement difference delta S so that the main jacking oil cylinder J_{Master and slave}And the following oil cylinder J_{Next time}The jacking state of (2) is kept synchronous:

i) if Delta S is more than 0.05mm, increasing the following oil cylinder J_{Next time}The cylinder is hydraulic, and the lifting following cylinder J_{Next time}The jacking speed of (2).

II) if delta S is less than 0.05mm, reducing the following oil cylinder J_{Next time}The cylinder hydraulic pressure of and the following cylinder J is reduced_{Next time}The jacking speed of (2).

As shown in the upper half of fig. 4, the motion deviation adjustment process of the rectangular push bench in this embodiment is roughly divided into four stages, the first stage is an initial stage, the push bench pushes in according to a preset axis, the second stage is a deviation stage, the posture of the push bench changes and starts to deviate from the preset axis, the third stage is a deviation correction stage, the deviation correction cylinder extends out, so that the center of the head is located on the preset axis, the fourth stage is a completion stage, and the push bench returns to the preset axis again after the completion of the correction. In the embodiment, in order to make the correction adjustment process more precise and avoid damage to equipment, the correction process is further refined by a time-sharing migration micro-jacking method and a multi-cylinder synchronous jacking strategy, and the adjustment range of each correction adjustment is reduced. The specific adjustment process is shown in the lower half of fig. 4. As can be seen from fig. 4, the conventional deviation rectifying and adjusting process is divided into a plurality of steps, and the deviation rectifying and adjusting process is completed in sequence by combining with the jacking process. After each jacking unit is completed, adjusting the pressure of each group of the deviation rectifying oil cylinders, and controlling the posture of the rectangular pipe jacking machine head; finally, the purpose of deviation rectification is achieved.

In the jacking process of the time-sharing migration space posture rectification rectangular push bench in the embodiment, soil property information and the loading condition of the push bench are considered, the jacking data of the oil cylinder are updated in real time according to the posture of the push bench, the jacking track of the rectangular push bench can be controlled, the environmental adaptability is good, the rectification efficiency is high, and the situations of over-rectification and less-rectification during rectification of the rectangular push bench are effectively avoided.

Example 2

The embodiment provides a self-seeking rectangular push bench with dynamic deviation rectification, and the rectangular push bench adopts a time-sharing migration spatial posture fine-tuning deviation rectification method as in embodiment 1 to realize spatial posture adjustment in the jacking process, so as to ensure that the real tunneling track of the rectangular push bench is consistent with the preset ideal track.

As shown in FIG. 5, the rectangular pipe push bench comprises a machine head 1, a barrel body 2, a deviation rectifying assembly, a propulsion oil cylinder and a hydraulic pump station 9. The pushing oil cylinder is arranged at the rear end of the cylinder body 2 and used for driving the rectangular push bench to push forwards. The deviation rectifying assembly is arranged between the machine head 1 and the cylinder body 2 and comprises a plurality of groups of deviation rectifying oil cylinders 4 for adjusting the movement direction of the machine head 1 when the machine head is pushed forwards. The hydraulic pump station 9 is used for adjusting the hydraulic quantity of the deviation-correcting oil cylinder 4, and further controlling the stretching quantity and the stretching speed of the deviation-correcting oil cylinder 4.

The deviation rectifying assembly of the embodiment comprises at least four groups of deviation rectifying oil cylinders 4 which are respectively positioned on four side edges of the machine head 1 of the rectangular pipe jacking machine, and the jacking direction of the machine head is adjusted by adjusting the telescopic amount of each group of deviation rectifying oil cylinders 4 in a differentiation manner. As shown in fig. 6, each set of deviation rectifying cylinders 4 at least includes two cylinders, namely a main jacking cylinder 41 and a following cylinder 42, and the main jacking cylinder 41 and the following cylinder 42 move synchronously. The main jacking oil cylinder 41 and the following oil cylinder 42 are simultaneously combined into a group, so that higher deviation rectifying thrust can be provided, the rigidity is higher, and the main jacking oil cylinder and the following oil cylinder are not easy to damage in the using process.

Specifically, in the present embodiment, the number of the deviation-correcting cylinders 4 is 16, and the deviation-correcting cylinders are respectively installed at 8 positions, and the installation manner is shown in fig. 7. As shown in the figure, the upper left, lower left, upper right, lower right, upper left, upper right, lower left and lower right sides of the periphery of the rectangular machine head 1 respectively comprise a group of deviation rectifying components (namely a main jacking oil cylinder 41 and a following oil cylinder 42). By adopting the distribution mode of the shape like the Chinese character 'jing' in the embodiment, the stress of the deviation rectifying component is more uniform, and the overload risk of the deviation rectifying component is reduced.

The rectangle push bench that this embodiment provided still includes: the system comprises a displacement sensor 6, a pose measuring module 7, a working condition detecting module 8, a data processing module 10 and a control module 11.

The displacement sensor 6 is installed on the deviation-correcting oil cylinders 4 and used for detecting the stretching amount of each deviation-correcting oil cylinder 4. The displacement sensor 6 can monitor the current telescopic state of the deviation-rectifying oil cylinders 4 in real time in the adjusting process of each deviation-rectifying oil cylinder 4. In the operation process of the equipment, on one hand, the displacement sensor 6 can acquire the current state of each deviation-correcting oil cylinder 4, and determine the target stretching amount of each deviation-correcting oil cylinder 4 by combining the target stretching state. On the other hand, the displacement sensor 6 can feed back the telescopic length of the deviation-rectifying oil cylinder 4 in the deviation-rectifying action executing process, so that the deviation-rectifying adjusting process can be controlled more accurately.

The pose measuring module 7 is used for acquiring real-time pose information of the rectangular push bench. The attitude information collected by the pose measurement module 7 includes: pitch angle α, azimuth angle β, and roll angle θ. Specifically, in this embodiment, the pose measurement module 7 uses a gyroscope as a detection instrument.

The working condition detection module 8 is used for acquiring the environmental state information of the rectangular push bench under the current working condition. In this embodiment, the rectangular push bench with time-sharing migration space attitude fine tuning and deviation rectification is particularly added with a working condition detection module 8, and the environmental state information detected by the working condition detection module 8 includes: soil complexity ρ of construction site_{Soil for soil}Water complexity rho of construction site_{Water (W)}And characteristic value P of loading condition of rectangular pipe jacking machine during construction_Carrier. Specifically, the distribution of the loading conditions of the rectangular push bench is shown in fig. 8.

The rectangular push bench in the embodiment considers the influence of different working conditions on the deviation rectifying process of the equipment, and the soil environment, the water environment and the load condition encountered by the equipment are different under different working conditions. Under such a complex condition, a single deviation rectification adjustment mode cannot be adopted for working, otherwise, the safety of equipment and the tunneling effect can be influenced; even the rectangular push bench is seriously damaged.

In the embodiment, the soil complexity rho of the current equipment working environment is obtained through the working condition detection module 8_{Soil for soil}Water complexity rho_{Water (W)}And characteristic value P of loaded condition_Carrier. Therefore, the optimal deviation rectifying and adjusting amplitude under different working conditions can be determined, and the equipment can be ensured to stably and uniformly complete the deviation rectifying and adjusting process without being greatly damaged.

As shown in fig. 9, the data processing module 10 includes a positional deviation calculation unit 101, a target expansion and contraction state calculation unit 102, an environment allowable expansion and contraction amount calculation unit 103, and an actual expansion and contraction amount generation unit 104. In this embodiment, the data detected by the displacement sensor 6, the pose measurement module 7 and the working condition detection module 8 are all transmitted to the data transmission module, and are used for calculating the actual stretching amount of each deviation rectifying cylinder 4 under each deviation rectifying action.

The deviation calculation unit is used for acquiring the detection result of the pose measurement module 7 in real time according to a preset sampling frequency, and calculating the position deviation between the current state of the rectangular push bench and the preset axis of the target track according to the preset axis and the posture information of the push track. The positional deviation includes a horizontal deviation, a vertical deviation, and a rollover angle. As shown in fig. 10, the positional deviation calculation unit 101 calculates the horizontal deviation B, the vertical deviation C, and the rollover angle γ using the following calculation formulas:

B＝L·tanα，

C＝L·tanβ，

γ＝θ

in the above formula, the horizontal deviation B represents the horizontal distance between the center of the head 1 of the rectangular push bench and the preset axis; the vertical deviation C represents the vertical distance between the center of the head 1 of the rectangular push bench and a preset axis; gamma is the angle of the head 1 of the push bench turned over along the axis; l represents the distance from the center of the tail end of the barrel body 2 of the rectangular push bench to the center of the head 1.

And the target stretching posture calculation unit is used for solving the target stretching state of each correction oil cylinder 4 in the correction assembly of the rectangular push pipe according to the kinematic model and the position deviation of the rectangular push pipe machine. The target telescopic state is the telescopic state that each deviation rectifying oil cylinder 4 needs to reach for completing the deviation rectifying action.

The process of solving the target telescopic state of each deviation-correcting oil cylinder 4 by the target telescopic state calculating unit 102 is as follows:

(1) simplifying the rectangular pipe jacking machine into a kinematic model of an 8-UPU parallel mechanism; establishing a space rectangular coordinate system by taking the machine head 1 as a movable platform and the cylinder body 2 as a static platform; wherein Q-XYZ is a moving platform coordinate system, and O-XYZ is a static platform coordinate system.

(2) Obtaining the position deviation P, and solving the deviation-corrected target posture W' of the rectangular push bench by adopting the following formula:

wherein, W₀In order to move the initial coordinates of the platform,is an angle rotation matrix, P is a position deviation, and satisfies:

(3) defining the coordinate of the hinge on the deviation rectifying oil cylinder 4 in the target posture W' as (X)_bi，Y_bi，Z_bi) The coordinate of the lower hinge is (x)_ai，y_ai，z_ai) The distance l between the upper hinge and the lower hinge of the deviation-correcting oil cylinder 4_iCalculated by the following formula:

wherein (X)_bi，Y_bi，Z_bi) On the moving platform coordinate system, (x)_ai，y_ai，z_ai) On a stationary platform coordinate system.

(4) According to the initial length l of each group of deviation rectifying components₀And the distance l between the upper hinge and the lower hinge of each group of deviation-correcting oil cylinders 4_iCalculating the target telescopic state delta l of each group of the deviation-rectifying oil cylinders 4_iThe calculation formula is as follows:

Δl_i＝l_i-l₀；

wherein,. DELTA.l_iWhen the deviation is more than 0, the characteristic deviation rectifying oil cylinder 4 should extend by delta l_iIf the deviation correcting oil cylinder is less than 0, the characteristic deviation correcting oil cylinder 4 should be shortened.

In this embodiment, the kinematics model of the rectangular push bench needs to be determined to solve the target telescopic state of each deviation rectifying cylinder 4, and it is difficult to directly describe the coordinates of the head 1 and the kinematics model is difficult to establish in consideration of the complex structure of the rectangular push bench. However, in the present embodiment, it is considered that in the apparatus, the barrel 2 and the head 1 are connected by a plurality of deviation cylinders 4, and the deviation cylinders 4 limit the moving direction of the head 1, so that the rectangular push bench can be simplified to an "8-UPU parallel mechanism". And a movable platform coordinate system Q-XYZ is established on the machine head 1, the origin of coordinates Q is positioned at the center of a plane where a hinge on the deviation-correcting oil cylinder 4 intersects with the machine head 1, the normal direction of the machine head 1 is a Z axis, the horizontal direction is an X axis, and the vertical direction is a Y axis. A stationary platform coordinate system O-xyz is established on the cylinder body 2, the origin of coordinates O is positioned at the center of the intersecting plane of the lower hinge of the deviation-correcting oil cylinder 4 and the cylinder body 2, the normal direction of the cylinder body 2 is a z axis, the horizontal direction is an x axis, and the vertical direction is a y axis. And (4) performing translation and rotation transformation on the moving platform coordinate system to obtain the deviation-rectifying target posture of the push bench.

The environment allowable expansion amount calculation unit 103 is configured to obtain a detection result of the operating condition detection module 8, calculate an environment coefficient under the current operating condition according to the environment state information, and further query the environment allowable expansion amount under the current operating condition according to the environment coefficient. The environment allowable expansion amount is the maximum expansion amount of each deviation-correcting oil cylinder 4 under the current working condition.

Wherein, the environment allowable expansion amount calculation unit 103 calculates the environment coefficient a under the current working condition by using the following formula_{Ring (C)}：

Wherein k is₁Representing the soil complexity ρ_{Soil for soil}The weighting coefficient of (2); k is a radical of₂Representing the water complexity ρ_{Water (W)}The weighting coefficient of (2); k is a radical of₃Representing said loaded conditionValue P_CarrierThe weighting coefficient of (2).

The above formula can be analyzed to find that: when the soil and water in the construction area are more complicated, the value of the environment allowable expansion amount A is smaller, and similarly, when the loading of the pipe jacking machine is larger, the value of the environment allowable expansion amount A is also smaller.

Meanwhile, the data processing module 10 further includes a storage unit 105, and the storage unit 105 is pre-stored with an "environment coefficient-environment allowable expansion amount comparison table" determined according to expert experience. In the comparison table, the environment allowable stretch quantity A is divided into at least seven levels, the interval of the environment coefficient is also divided into seven subintervals, and the environment coefficient A_{Ring (C)}When the values of (A) are in different subintervals, the values of the allowable expansion and contraction quantity A of a certain level of environment respectively correspond to the unique values.

After the environment allowable expansion amount computer unit calculates the environment coefficient under the current working condition, the environment allowable expansion amount of the equipment under the working condition can be obtained through a table look-up method. Under the current working condition, the actual telescopic quantity of each deviation rectifying cylinder of the deviation rectifying cylinders 4 cannot be larger than the value.

After deviation occurs in jacking track of the rectangular pipe jacking machine, the deviation rectifying oil cylinder 4 completes the deviation rectifying process through stretching, when the deviation rectifying oil cylinder 4 stretches, if the deviation rectifying oil cylinder 4 is pushed to the target value length at one time, disturbance to soil is large, the deviation rectifying oil cylinder 4 is easily overloaded, and because the soil quality condition of an underground space where pipe jacking construction is located is very complex, factors influencing the posture of the pipe jacking machine are many, the calculated target stretching amount l_siThe jacking precision of the pipe jacking machine is influenced by the phenomena of over-correction and less correction when the deviation is corrected at one time according to the target stretching amount, so that the jacking process of the deviation correcting oil cylinder 4 is segmented, the jacking amount of each segment of the deviation correcting oil cylinder is adjusted in real time by considering the complexity of construction soil and the loading condition of the pipe jacking machine, the adaptability of deviation correction to surrounding soil is improved, and the jacking track precision of the pipe jacking machine is improved.

In this embodiment, the actual stretching amount generating unit 104 is configured to obtain a target stretching state of each deviation-correcting cylinder 4 and a detection value of the displacement sensor 6, further calculate a target stretching amount required by each deviation-correcting cylinder 4 to complete the deviation-correcting action, and then generate an actual stretching amount of each deviation-correcting action by using a time-sharing migration micro-jacking method according to a relationship between the target stretching amount and an environment allowable stretching amount under a current working condition. In the actual stretching amount generating unit 104, the calculation process of the actual stretching amount of each deviation rectifying cylinder 4 in each deviation rectifying action is as follows:

(1) according to the target telescopic state delta l of each group of deviation rectifying assemblies_iAnd the current actual state l of the oil cylinder, and calculating the target expansion amount l required to be finished when each group of deviation rectifying assemblies are rectified_siThe calculation formula is as follows:

l_si＝Δl_i-l；

(2) acquiring target expansion amount l in each group of deviation correcting assemblies_siIs recorded as the maximum target expansion/contraction quantity l_smax；

(3) Acquiring environment allowable expansion amount A under the current working condition; comparing environment allowable expansion amount A with maximum target expansion amount l_smaxMake the following decision:

i) when | l_smaxWhen | < A, the actual extension amount l of each group of deviation-correcting components in each deviation-correcting action_RiEqual to the calculated target expansion/contraction amount l_si；

Ii) when | l_smaxIf | is greater than A, the target deviation correction amount l is in each deviation correction action_siActual expansion amount l of the maximum deviation-correcting oil cylinder 4_RiA is equal to A, the other groups of deviation rectifying components are stretched in proportion, and the actual stretching amount l of each group of deviation rectifying components_RiSatisfies the following formula:

the logic of the time-sharing migration micro-jacking method in this embodiment is that when the calculated target expansion amount of the deviation-correcting oil cylinders 4 is smaller than the environment allowable expansion amount under the current working condition, each deviation-correcting oil cylinder 4 is adjusted according to the calculated target expansion amount. When the target expansion amount of some or all of the deviation-correcting oil cylinders 4 is larger than the environment allowable expansion amount of the current working condition, the deviation-correcting oil cylinder 4 with the largest target expansion amount is adjusted according to the environment allowable expansion amount, and other deviation-correcting oil cylinders 4 are adjusted in proportion according to the proportional relation of the respective target expansion amounts. Therefore, the adjusting effect of each deviation rectifying oil cylinder 4 can be ensured to be consistent with the adjusting state required to be achieved, and the adjusting quantity of each deviation rectifying oil cylinder 4 can not exceed the condition limit of the current working condition.

In this embodiment, the control module 11 includes a jacking control unit 111 and a deviation rectifying control unit 112. The jacking control unit 111 is configured to obtain a preset jacking trajectory, divide the jacking trajectory into a plurality of jacking units, and control the jacking cylinder 5 to sequentially execute jacking actions of the jacking units. In order to realize the fine control of the rectangular push bench and make the tunneling track of the equipment more consistent with the target track, when the jacking control unit 111 divides the jacking track, the distance of each jacking unit is not more than 100 mm. Specifically, in this embodiment, the distance between each jacking unit is set to 100mm, that is, the jacking cylinder 5 only jacks the machine forward by 100mm each time.

The deviation-correcting control unit 112 obtains the actual stretching amount of each deviation-correcting oil cylinder 4 in the deviation-correcting assembly calculated by the data processing module 10 when the jacking oil cylinder 5 executes one jacking unit each time; and controlling each deviation-rectifying oil cylinder 4 in the deviation-rectifying assembly to complete the adjustment process of the actual stretching amount.

Wherein, the deviation-correcting control unit 112 adopts a multi-cylinder synchronization strategy to complete the process of executing deviation-correcting actions by each group of deviation-correcting oil cylinders 4; the execution process of the multi-cylinder synchronization strategy specifically comprises the following steps:

(1) obtaining the amount of extension S of the master ram 41_{Master and slave}And the amount of expansion S of the following cylinder 42_{Next time}。

(2) Calculating the displacement difference Delta S between the expansion and contraction amounts of the main jacking cylinder 41 and the following cylinder 42, wherein Delta S is S_{Master and slave}-S_{Next time}。

(3) In the jacking process of each group of deviation rectifying assemblies, the following decision is made according to the displacement difference delta S so as to keep the jacking states of the main jacking oil cylinder 41 and the following oil cylinder 42 synchronous:

i) if the delta S is larger than 0.05mm, increasing the oil cylinder hydraulic pressure of the following oil cylinder 42 and increasing the jacking speed of the following oil cylinder 42.

II) if the delta S is less than 0.05mm, reducing the oil cylinder hydraulic pressure of the following oil cylinder 42 and reducing the jacking speed of the following oil cylinder 42.

In order to clearly embody the principle and the excellent performance of the self-seeking rectangular push bench for dynamic deviation rectification provided by the embodiment. The present embodiment further describes the working flow of the rectangular pipe jacking with reference to fig. 11.

In the running process of the rectangular pipe jacking machine, a tunnel is tunneled according to a preset track, and a jacking control unit 111 in a control module 11 divides an ideal tunneling track into multiple sections according to the jacking unit of every 100 mm. After the jacking cylinder 5 finishes one jacking unit, the jacking control unit 111 starts the equipment to execute the sequential deviation rectifying process.

One complete cycle of the deskewing process is as follows: firstly, the attitude information of the rectangular push bench detected by the attitude measurement module 7 is obtained by the position deviation calculation unit 101, and then the current position deviation of the rectangular push bench is calculated according to the attitude information.

And solving the target expansion state of the rectangular push bench according to the coordinate data of the established simplified model of the rectangular push bench and the calculated current position deviation of the rectangular push bench. When the position deviation of the rectangular push bench is too large, the difference between the current target stretching state and the actual stretching state of the rectangular push bench is large, and the deviation rectification adjustment needs to be carried out on the rectangular push bench. When the position deviation of the rectangular push bench is too small, the difference between the current target stretching state and the actual stretching state of the rectangular push bench is small, and the deviation rectification adjustment of the rectangular push bench is not needed, so that the execution of the deviation rectification action is skipped (or the deviation rectification action is still continuously executed, but the actually executed deviation rectification amplitude is 0).

The actual expansion amount generating unit 104 receives the solved current target expansion state of the rectangular push bench. Meanwhile, the working condition detection module 8 can detect the environmental state information of the rectangular push bench under the current working condition, the environmental state information is sent to the environment allowable quantity calculation unit, the environment allowable quantity calculation unit calculates the environmental coefficient firstly, and then the environment allowable expansion quantity is calculated through a table look-up method. The searched environment allowable stretching amount is sent to the actual stretching amount generating unit 104, and the actual stretching amount generating unit 104 calculates the actual stretching amount of each deviation rectifying cylinder 4 when executing deviation rectifying action by adopting a time-sharing migration micro-jacking method.

After acquiring the generated actual stretching amount, the deviation rectification control unit 112 in the control module 11 controls the deviation rectification oil cylinder 4 to perform deviation rectification action to complete the adjustment target of the actual stretching amount.

In addition, in the present embodiment, it is considered that when a large deviation occurs due to a special situation in the rectangular push bench, the deviation rectification adjustment may not be realized by the deviation rectification cylinder 4. Therefore, the present embodiment also provides an alarm module 12 on the rectangular push bench. When executing the deviation rectifying action, the control module 11 further obtains the target telescopic state of each deviation rectifying cylinder 4 calculated by the target telescopic state calculating unit 102, and compares the target telescopic amount state with the theoretical stroke range of the corresponding deviation rectifying cylinder 4. When the target telescopic state of a certain deviation-correcting oil cylinder 4 exceeds the theoretical stroke range, the control module 11 gives an instruction to the alarm module 12, and the alarm module 12 sends out an alarm signal.

Example 3

In embodiment 2, the data processing module 10 of the rectangular push bench belongs to a part of the rectangular push bench, and the rectangular push bench can complete four contents of data acquisition (i.e., the working contents of the displacement sensor 6, the pose measurement module 7, and the working condition detection module 8), data analysis and processing (i.e., the working contents of the data processing module 10), dynamic deviation correction control (i.e., the working contents of the control module 11), and abnormal alarm in the operation process.

The difference between the self-seeking rectangular push bench for dynamic deviation rectification provided in this embodiment and embodiment 1 is that: in this embodiment, it is considered that the amount of data involved in the operation of the device is large, and the pressure of data calculation processing is high. The rectangular pipe jacking machine has narrow equipment space, severe working environment, high temperature and dryness heat; the data processing module 10 of the device has limited volume and heat dissipation performance, and is difficult to deploy high-performance computing equipment, so that the computing requirement of a data processing task cannot be met. In order to solve the above problem, the present embodiment provides a special background database and server 14 to help complete the work content of the data processing part. The server 14 and background database may be located in an environment remote from the site of the device. As shown in fig. 12, in this kind of apparatus, the data processing module 10 is replaced by the background database and the server 14, and meanwhile, the communication module 13 needs to be added in the rectangular push bench, the communication module 13 transmits the detection results of the displacement sensor 6, the pose measurement module 7 and the working condition detection module 8 to the server 14, and transmits the actual stretching amount of each deviation rectifying cylinder 4 in each deviation rectifying action calculated by the server 14 to the controller, and the controller controls the pushing and deviation rectifying processes of the rectangular push bench.

The above examples are merely illustrative of several embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.