阅读说明：本技术 一种导向式微型顶管施工方法 (Guide type miniature pipe jacking construction method ) 是由 安关峰 张蓉 于海滨 刘添俊 王谭 张旭聪 徐德意 于 2021-08-03 设计创作，主要内容包括：本发明提供了一种导向式微型顶管施工方法,包括下述步骤：步骤一：始发井内,用开孔装置对始发井内壁打通作业孔；步骤二：安装激光指向仪和激光导向钻头,用顶推装置把连接有激光导向钻头的导向杆打入开通好的作业孔中,用顶推装置把导向杆打入土体中,步骤三：用顶推装置把多个排泥管依次跟随着导向杆顶入土体中,步骤四：用顶推装置把多个排泥螺旋杆顶入排泥管内部,步骤五：利用顶推装置把顶管机头跟随着排泥管顶入土体,顶管机头上的刀盘旋转带动排泥螺旋杆转动,步骤六：利用顶推装置把多个预制管节跟随着顶管机头顶入土体内。本发明能够进行高精度低成本的顶管施工。(The invention provides a guide type miniature pipe jacking construction method, which comprises the following steps: the method comprises the following steps: in the starting well, a hole opening device is used for opening an operation hole on the inner wall of the starting well; step two: installing a laser direction indicator and a laser guide drill bit, driving a guide rod connected with the laser guide drill bit into the opened operation hole by using a pushing device, and driving the guide rod into a soil body by using the pushing device, and the third step: the pushing device is used for pushing a plurality of mud discharge pipes into the soil body along with the guide rod in sequence, and the step four is as follows: ejecting a plurality of mud discharging screw rods into the mud discharging pipe by using an ejecting device, and performing the fifth step: utilizing the thrustor to push the pipe pushing jack head into the soil body along with the mud discharging pipe, rotating a cutter head on the pipe pushing jack head to drive a mud discharging screw rod to rotate, and carrying out the sixth step: and ejecting the plurality of prefabricated pipe joints into the soil along with the pipe jacking machine head by using the ejecting device. The invention can carry out high-precision low-cost pipe jacking construction.)

1. A guide type miniature pipe jacking construction method is characterized by comprising the following steps:

the method comprises the following steps: in the starting well (2), adopting a hole opening device to open a working hole in the inner wall of the starting well (2), and simultaneously spraying and fixing soil (1) around the working hole;

step two: installing a laser direction instrument and a pushing device (4) in a starting well (2), wherein the laser direction instrument is wirelessly connected with a laser guide drill bit (51), the laser guide drill bit (51) is connected with one end of one guide rod (5), the guide rod (5) connected with the laser guide drill bit (51) is driven into the opened operation hole by using the pushing device (4), and more than two guide rods (5) are sequentially driven into the operation hole by using the pushing device (4) until one end of one guide rod enters a receiving well;

step three: the method comprises the steps that a funnel-shaped push head (61) is installed at one end of a mud discharging pipe (6), the mud discharging pipe (6) provided with the push head (61) is pushed into a soil body (1) along with a guide rod (5) by utilizing a pushing device (4), the push head (61) abuts against one end of one of the guide rods (5), more than two mud discharging pipes (6) are pushed into the soil body (1) along with the mud discharging pipe (6) provided with the push head (61) by utilizing the pushing device (4) until all the guide rods (5) are pushed out to a receiving well (3), and all the guide rods (5) entering the receiving well (3) are moved out of the receiving well (3).

Step four: when one of the sludge discharge pipes (6) enters the receiving well (3), more than two sludge discharge spiral rods (7) are pushed into the sludge discharge pipes (6) by utilizing the pushing device (4) until one of the sludge discharge spiral rods (7) enters the receiving well (3);

step five: a jacking pipe head (8) is jacked into a hole along with a terminal mud discharging pipe (6) by utilizing a jacking device (4), a cutter head (81) arranged at one end of the jacking pipe head (8) rotates to drive all mud discharging spiral rods (7) to rotate, the cutter head (81) cuts a soil body (1), the cut soil body (1) enters a soil pressure bin (82) arranged at the other end of the jacking pipe head (8), and the soil body (1) in the soil pressure bin (82) is discharged to an originating well (2) or a receiving well (3) through the mud discharging spiral rods (7) and the mud discharging pipe (6).

Step six: more than two prefabricated pipe joints (9) are pushed into the soil body (1) along with a pipe jacking machine head (8) by utilizing a pushing device (4) until all mud discharging screw rods (7), guide rods (5) and a pipe jacking machine head (8) are pushed out into a receiving well (3), and laying of underground pipelines is completed.

2. The method for guided mini-pipe jacking construction according to claim 1, wherein a loosening agent injection device is arranged at one end of the guide rod (5) in the second step, and the loosening agent injection device injects a loosening agent to soil when the guide rod (5) is driven into the soil body (1).

3. The guided mini pipe jacking construction method as claimed in claim 1, wherein said laser direction indicator is independently installed on the concrete at the bottom of said originating well (2).

4. The guided mini jacking pipe construction method as claimed in claim 1, wherein said jacking pipe head (8) is a tunneling cutting jacking pipe head (8).

5. The guided mini jacking pipe construction method as claimed in claim 1, wherein said jacking pipe head (8) is a squeeze jacking pipe head (8).

6. The method as claimed in claim 1, wherein in the fifth step, when the cutter head (81) rotates in one direction, the soil body (1) in the soil pressure chamber (82) is discharged to the starting well (2) through the mud discharging screw rod (7) and the mud discharging pipe (6).

7. The method of claim 1, wherein in the fifth step, when the cutter head (81) rotates in one direction, the soil body (1) in the soil pressing bin (82) is discharged to the receiving well (3) through the mud discharging screw rod (7) and the mud discharging pipe (6).

Technical Field

The invention relates to the technical field of pipe jacking construction, in particular to a guide type micro pipe jacking construction method.

Background

With the development of urban construction, especially the improvement of old cities, various pipeline burying projects with small pipe diameters are increased continuously, but the traditional slotting construction is more and more not suitable for construction requirements due to road damage, traffic influence, environmental pollution and the like, and the problem can be solved more effectively in the pipe-jacking construction.

However, the construction precision of the existing pipe jacking needs to be improved, and the construction cost is higher, so that a guide type micro pipe jacking construction method needs to be designed to improve the construction precision and reduce the construction cost.

Disclosure of Invention

Aiming at the technical problems, the invention aims to provide a guide type micro pipe jacking construction method, which is realized by adopting the following technical scheme for solving the technical problems:

a construction method of a guide type miniature jacking pipe comprises the following steps:

the method comprises the following steps: in the starting well, adopting a hole opening device to open a working hole on the inner wall of the starting well, and simultaneously spraying and fixing soil around the working hole;

step two: installing a laser direction instrument and a pushing device in an originating well, wherein the laser direction instrument is wirelessly connected with a laser guide drill bit, the laser guide drill bit is connected with one end of one of the guide rods, the guide rod connected with the laser guide drill bit is driven into the opened operation hole by using the pushing device, and more than two guide rods are sequentially driven into the operation hole by using the pushing device until one end of one of the guide rods enters into a receiving well;

step three: the funnel-shaped push head is arranged at one end of a mud discharging pipe, the mud discharging pipe provided with the push head is pushed into a soil body along with a guide rod by utilizing the pushing device, the push head abuts against one end of one of the guide rods, more than two mud discharging pipes are pushed into the soil body along with the mud discharging pipe provided with the push head by utilizing the pushing device until all the guide rods are pushed out into the receiving well, and all the guide rods entering the receiving well are moved out of the receiving well.

Step four: when one of the mud discharging pipes enters the receiving well, more than two mud discharging spiral rods are pushed into the mud discharging pipes by utilizing the pushing device until one of the mud discharging spiral rods enters the receiving well;

step five: a pushing device is utilized to push a pipe pushing machine head into a hole along with a mud discharging pipe at the tail end, a cutter head arranged at one end of the pipe pushing machine head rotates to drive all mud discharging spiral rods to rotate, the cutter head cuts a soil body, the cut soil body enters a soil pressure bin arranged at the other end of the pipe pushing machine head, and the soil body in the soil pressure bin is discharged to an originating well or a receiving well through the mud discharging spiral rods and the mud discharging pipe.

Step six: and (3) utilizing a pushing device to push more than two prefabricated pipe joints into the soil along with the pipe jacking machine head until all the sludge discharge screw rods, the guide rods and the pipe jacking machine head are pushed out into a receiving well, and finishing the laying of the underground pipeline.

Advantageously, in the second step, a loosening agent injection device is arranged at one end of the guide rod, and when the guide rod is driven into the soil body, the loosening agent injection device injects a loosening agent to the soil.

Advantageously, the laser pointer is mounted independently on the bottom concrete of the originating well.

Advantageously, the ejector head is a rippling cutting ejector head.

Advantageously, the ejector head is a squeeze ejector head.

Advantageously, in the fifth step, when the cutterhead rotates in one direction, the soil in the soil pressing bin is discharged to the originating well through the mud discharging screw rod and the mud discharging pipe.

Beneficially, in step five, when the cutterhead rotates towards one direction, the soil in the soil pressing bin is discharged to the receiving well through the mud discharging screw rod and the mud discharging pipe.

The invention has the following beneficial effects:

1. the pushing device disclosed by the invention is small in size, light in weight, convenient to operate and high in construction efficiency, and can be constructed in a narrow roadway space: the construction method can be used for construction in a working well with the diameter of 1800mm, and is suitable for pipeline engineering with smaller diameter;

2. the construction method is suitable for a wide range of stratums, such as a plurality of soil layers of flowing plastic clay, a soft soil layer, a hard soil layer, a sand layer, a gravel layer with the diameter smaller than 50mm and the like, and the construction method can be adopted;

3. the rotation direction of the cutter head can be controlled according to actual conditions, so that the soil body is controlled to be discharged to an initial well or a receiving well, the waste soil or the silt is convenient to treat, and the mud treatment cost is reduced;

4. the construction quality is excellent, because of adopting the advanced laser guide drill bit to guide, the straightness error of the guide rod is +/-2.5 cm, after the pipeline construction is finished, the pipeline is high in straightness, does not break off joints and does not leak water, no water leakage between the joints caused by muddy water balance deviation rectifying transition exists, and the strict requirement of gravity flow is fully met.

Drawings

The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.

FIG. 1 is a schematic structural view in the third step of the guiding type micro pipe jacking construction method of the invention;

FIG. 2 is a schematic structural view of the guiding type micro pipe jacking construction method at the end of step three;

FIG. 3 is a schematic structural view of the guiding type micro pipe jacking construction method in the fourth construction step;

FIG. 4 is a schematic structural view of a guiding type micro pipe jacking construction method in the construction of step six.

Reference numerals: soil body 1, originating well 2, receiving well 3, thrustor 4, guide bar 5, laser guide drill 51, mud pipe 6, pushing head 61, mud discharging screw 7, pipe jacking machine head 8, cutter head 81, soil pressure bin 82, prefabricated tube coupling 9.

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.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be further noted that, unless otherwise specifically stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, connected through an intermediate medium, or connected through the insides of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in fig. 1-4, a guiding type micro pipe jacking construction method comprises the following steps:

the method comprises the following steps: in the starting well 2, adopting a hole opening device to open a working hole on the inner wall of the starting well 2, and simultaneously spraying and fixing soil 1 around the working hole;

step two: installing a laser direction instrument and a pushing device 4 in an originating well 2, wherein the laser direction instrument is wirelessly connected with a laser guide drill bit 51, the laser guide drill bit 51 is connected with one end of one guide rod 5, the guide rod 5 connected with the laser guide drill bit 51 is driven into the opened operation hole by using the pushing device 4, and more than two guide rods 5 are sequentially driven into the operation hole by using the pushing device 4 until one end of one guide rod enters a receiving well;

step three: the funnel-shaped push head 61 is arranged at one end of one mud discharging pipe 6, the mud discharging pipe 6 provided with the push head 61 is pushed into the soil body 1 along with the guide rod 5 by utilizing the pushing device 4, the push head 61 is propped against one end of one of the guide rods 5, more than two mud discharging pipes 6 are pushed into the soil body 1 along with the mud discharging pipe 6 provided with the push head 61 by utilizing the pushing device 4 until all the guide rods 5 are pushed out into the receiving well 3, and all the guide rods 5 entering the receiving well 3 are moved out of the receiving well 3.

Step four: when one of the sludge discharge pipes 6 enters the receiving well 3, more than two sludge discharge spiral rods 7 are pushed into the sludge discharge pipes 6 by utilizing the pushing device 4 until one of the sludge discharge spiral rods 7 enters the receiving well 3;

step five: a jacking pipe head 8 is jacked into a hole along with a mud discharging pipe 6 at the tail end by utilizing a jacking device 4, a cutter head 81 arranged at one end of the jacking pipe head 8 rotates to drive all mud discharging spiral rods 7 to rotate, the cutter head 81 cuts a soil body 1, the cut soil body 1 enters a soil pressure bin 82 arranged at the other end of the jacking pipe head 8, and the soil body 1 in the soil pressure bin 82 is discharged to an originating well 2 or a receiving well 3 through the mud discharging spiral rods 7 and the mud discharging pipe 6.

Step six: more than two prefabricated pipe joints 9 are pushed into the soil body 1 along with the pipe jacking machine head 8 by utilizing the pushing device 4 until all the mud discharging screw rods 7, the guide rods 5 and the pipe jacking machine head 8 are pushed out into the receiving well 3, and the laying of the underground pipeline is completed.

According to an alternative embodiment of the present invention, in the second step, a loosening agent injection device is provided at one end of the guide rod 5, and when the guide rod 5 is driven into the soil body 1, the loosening agent injection device injects a loosening agent to the soil.

According to an alternative embodiment of the invention, the laser pointing instrument is mounted independently on the concrete at the bottom of the originating well 2.

According to an alternative embodiment of the invention, the ejector head 8 is a tunnel cutting ejector head 8.

According to an alternative embodiment of the invention, the ejector head 8 is a squeeze ejector head 8.

According to an alternative embodiment of the present invention, in the fifth step, when the cutterhead 81 rotates in one direction, the soil body 1 in the soil pressing chamber 82 is discharged to the originating well 2 through the mud discharging screw 7 and the mud discharging pipe 6.

According to an alternative embodiment of the present invention, in the fifth step, when the cutterhead 81 rotates in one direction, the soil body 1 in the soil pressing bin 82 is discharged to the receiving well 3 through the mud discharging screw 7 and the mud discharging pipe 6.

The pushing device 4 is small in size, light in weight, convenient to operate and high in construction efficiency, can be constructed in a narrow roadway space, can be constructed in a working well with the diameter of 1800mm, and is suitable for pipeline engineering with smaller diameter; the construction method is suitable for a wide range of stratums, such as a plurality of soil layers of flowing plastic clay, a soft soil layer, a hard soil layer, a sand layer, a gravel layer with the diameter smaller than 50mm and the like, and the construction method can be adopted; the rotation direction of the cutter head 81 can be controlled according to actual conditions, so that the soil body 1 is controlled to be discharged to the starting well 2 or to be discharged to the receiving well 3, the waste soil or the silt is convenient to treat, and the mud treatment cost is reduced; the construction quality is excellent, because the advanced laser guide drill bit 51 is adopted for guiding, the straightness error of the guide rod 5 is +/-2.5 cm, after the pipeline construction is finished, the straightness is high, the joint is not detached, water is not leaked, and the water leakage between joints caused by muddy water balance deviation rectifying transition is avoided, so that the strict requirement of gravity flow is fully met.

The components of the present invention, the structures of which are not described in detail, are all common standard components or components known to those skilled in the art, and the structures and principles of which are known to those skilled in the art through technical manuals or through routine experimentation.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.