阅读说明：本技术 一种顶管的非开挖原位纠偏设计施工方法 (Trenchless in-situ deviation rectification design construction method for jacking pipe ) 是由 王复明 方宏远 潘艳辉 赵鹏 于 2020-05-13 设计创作，主要内容包括：一种顶管的非开挖原位纠偏设计施工方法,包括以下步骤：S1、将顶管与地表坐标建立联系,将偏差段顶管位置反算至地表,然后计算原位修复顶推力；S2、对地表定位进行验证,通过后标识为松土引导孔,然后对顶管附近区域进行松土施工；S3、在地表顶推点向下竖向钻孔至顶管底部,然后将反力槽钢和千斤顶植入孔中,通过千斤顶对顶管施加顶推力进行水平纠偏；S4、利用高聚物注浆技术适当抬升顶管并稳定顶管底部；S5、利用高聚物对顶管段四周松土区域进行填充封闭以及置换固定。本发明构件的施工方法具有安全可靠、施工快捷、技术先进、经济环保指标优越等诸多优点,为市政顶管工程的建造及维护提供了有力的技术保障,发展应用前景可观。(A trenchless in-situ deviation rectification design construction method for jacking pipes comprises the following steps: s1, establishing a relation between the jacking pipe and the ground surface coordinates, calculating the position of the jacking pipe of the deviation section back to the ground surface, and then calculating the in-situ restoration jacking force; s2, verifying the ground surface positioning, marking the ground surface positioning as a soil loosening guide hole after the ground surface positioning passes, and performing soil loosening construction on the area near the top pipe; s3, vertically drilling a hole downwards to the bottom of the jacking pipe at the earth surface jacking point, then implanting a counterforce channel steel and a jack into the hole, and applying jacking force to the jacking pipe through the jack to horizontally correct the deviation; s4, properly lifting the jacking pipe and stabilizing the bottom of the jacking pipe by using a high polymer grouting technology; and S5, filling, sealing, replacing and fixing the soil loosening region around the top pipe section by using high polymer. The construction method of the member has the advantages of safety, reliability, rapid construction, advanced technology, excellent economic and environmental protection indexes and the like, provides powerful technical support for the construction and maintenance of municipal pipe jacking engineering, and has considerable development and application prospects.)

1. The trenchless in-situ deviation rectification design construction method of the jacking pipe is characterized by comprising the following steps of:

s1, establishing a relation between the jacking pipes and the ground surface coordinates, calculating the positions of the jacking pipes in the deviation sections to the ground surface in a reverse mode, measuring and positioning, and calculating the in-situ restoration jacking force according to the shear strength, the tensile strength and the safety coefficient of the soil;

s2, verifying the ground surface positioning, marking the ground surface positioning as a soil loosening guide hole after the ground surface positioning passes, further enlarging the aperture of the soil loosening guide hole, and performing soil loosening construction on the area near the top pipe;

s3, determining a ground surface jacking point according to the position of the jacking pipe, vertically drilling a hole downwards to the bottom of the jacking pipe at the jacking point, then implanting a reaction channel steel and a jack into the vertical drilling hole of the jacking point, and applying jacking force to the jacking pipe through the jack to horizontally correct the deviation;

s4, after horizontal deviation rectification is completed, properly lifting the jacking pipe and stabilizing the bottom of the jacking pipe by using a high polymer grouting technology;

and S5, after the jacking pipe is rectified to be in place, filling and sealing the periphery of the jacking pipe section by using high polymers, and then replacing and fixing the soil loosening area, the soil loosening guide hole and the vertical drilling hole of the jacking point.

2. The trenchless in-situ deviation rectification design construction method for jacking pipe as claimed in claim 1,

in the step S3, a deformation monitoring system needs to be established before the pipe jacking horizontal pushing reset is performed, the deformation monitoring system includes an earth surface monitoring system and a pipe jacking internal monitoring system, and the implementation manner of the monitoring system includes setting of monitoring frequency and continuous monitoring.

3. The trenchless in-situ deviation rectification design construction method for jacking pipe as claimed in claim 1,

the method for implanting the reaction channel steel and the jack in the step S3 specifically comprises the following steps:

according to the embedding depth of the jacking pipe, the jack is fixed on the counterforce channel steel, then the counterforce channel steel is implanted into the vertical drilling hole of the pushing point according to the pushing direction, and the supporting counterforce of the jack is provided by means of the counterforce channel steel and the side wall soil body.

4. The trenchless in-situ deviation rectification design construction method for jacking pipe as claimed in claim 1,

the method for performing horizontal deviation correction in step S3 is specifically to control a plurality of jacks to synchronously apply jacking force by using a hydraulic balance valve.

5. The trenchless in-situ deviation rectification design construction method for jacking pipe as claimed in claim 1,

the safety factor in step S1 is 1.3 or more.

6. The trenchless in-situ deviation rectification design construction method for jacking pipe as claimed in claim 1,

the verification method in the step S2 is specifically to perform verification by using a drilling machine to drill holes vertically.

7. The trenchless in-situ deviation rectification design construction method for jacking pipe as claimed in claim 1,

the method for scarifying the soil in the area near the top pipe in the step S2 is implemented by using slurry wall protection clear water rotary jetting drilling or slurry wall protection clear water swinging jetting drilling.

8. The trenchless in-situ deviation rectification design construction method for jacking pipe as claimed in claim 1,

the method for vertically drilling the hole with the pushing point downward in the step S3 is implemented by using a mud retaining wall positive circulation drilling machine.

9. The trenchless in-situ deviation rectification design construction method for jacking pipe as claimed in claim 1,

the replacement fixing material in the step S5 is cement slurry or plain concrete.

10. The trenchless in-situ deviation rectification design construction method for jacking pipes as claimed in any one of claims 1 to 9,

the method is also suitable for trenchless in-situ deviation rectification design construction of the rectangular jacking pipes and the underground comprehensive pipe gallery.

Technical Field

The invention belongs to the field of construction of push pipes and underground comprehensive pipe galleries in underground infrastructure such as civil engineering, water conservancy and municipal administration, and particularly relates to a trenchless in-situ deviation rectification design construction method for push pipes.

Background

The jacking pipe occupies an important position in the construction of infrastructure in China, can be used as a municipal drainage pipeline, an electric power pipeline and a communication pipeline, wherein the jacking pipe with a large diameter can also be used as an underground comprehensive pipe gallery, and particularly the trenchless construction characteristic of the jacking pipe is more and more favored by municipal managers and constructors. In the process of construction or use, the risk of pipe jacking deviation exists due to the change of complex geological conditions and external conditions, and the normal play of the use function of the pipe jacking is influenced. When the offset exceeds a certain limit value, corresponding engineering measures are required to recover the normal use function of the jacking pipe. The current common treatment measures are excavation replacement or removal and chiseling lining reinforcement, and the excavation replacement consumes long construction period and high construction cost; the later is applicable to the condition that the offset is less, and the cost is relatively lower, but has the possibility of push pipe structural strength deviation, and does not solve the engineering problem per se.

The invention patent CN 105570532A discloses a deviation rectifying construction method for a jacking pipe displacement deviation, which comprises the steps of pre-burying steel bar clamping bolts at the end of the jacking pipe during the prefabrication of the jacking pipe, uniformly distributing the steel bar clamping bolts around the jacking pipe, pre-inserting a hook at the upper part of the jacking pipe, checking the advancing height difference and the left and right direction deviation of the jacking pipe by adopting a suspension hanging ball, checking the deviation condition of the jacking pipe by centering the hanging ball after each section of the jacking pipe is jacked to a corresponding position along with the continuous extension of the jacking pipe, installing a steel bar outer hanging rack at the end of the advancing jacking pipe if the deviation exists, clamping the outer hanging rack at the end of the jacking pipe, slowly moving the jacking pipe by slowly prying a steel bar framework on the outer hanging rack left and right, and up and down, unloading the steel bar outer hanging rack after the deviation rectifying process is finished, and continuing jacking.

The invention patent CN 103603997A discloses a construction method for jacking pipe retreating and deviation rectifying, which comprises the following steps: step S101, a reverse pipe drawing device is installed at a hole outlet of a jacking pipe and used for drawing the jacking pipe backwards in a reverse direction; step S102, arranging a back-pull device at the relay space of the adjacent top pipes to back-pull the primary top pipe of the front side; step S103, the steel jacking pipe is reversely pulled in a grading manner until the head in front of the jacking pipe is pulled out of a deviation area; s104, reinforcing a deviated area section in front of the machine head to ensure that the soil quality in the jacking direction is uniform; and step S105, continuing to perform jacking, and rapidly jacking to enable the machine head to rapidly pass through the reinforced area.

In the two methods, an additional deviation correcting device is required to be installed in the pipe jacking construction process in the implementation process, so that the workload of the construction process is increased, and the two methods are troublesome.

In order to essentially solve the deviation problem of the jacking pipe and meet the requirement of subsequent use functions, the patent provides a brand-new jacking pipe deviation rectifying method based on the trenchless repairing technology, and the problem can be rapidly and fundamentally solved.

Disclosure of Invention

Aiming at overcoming the problems in the prior art, the invention provides a trenchless in-situ deviation rectifying design construction method for jacking pipes, aiming at the construction requirements of jacking pipes and underground comprehensive pipe galleries in underground infrastructures such as civil engineering, water conservancy and municipal engineering and the defects of the existing jacking pipe deviation rectifying technology. The invention provides an implementation idea of trenchless in-situ deviation rectification from the essence of the deviation rectification of the jacking pipe, and introduces monitoring control in the deviation rectification process to realize accurate deviation rectification. Based on the calculation and analysis of the shear strength and the tensile strength of the soil, the soil is loosened and then the deviation is corrected, then the jacking pipe is fixed, and finally the trenchless in-situ deviation correction of the jacking pipe is realized. The invention can safely and quickly finish the deviation rectifying work of the offset section jacking pipe, ensures the normal exertion of the function of the jacking pipe, and provides a novel method with advanced technology, safety, reliability, economy and reasonability for the construction and maintenance of the jacking pipe, the underground comprehensive pipe gallery and other projects in underground infrastructures such as civil engineering, water conservancy, municipal administration and the like.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a trenchless in-situ deviation rectification design construction method for jacking pipes comprises the following steps:

s1, establishing a relation between the jacking pipes and the ground surface coordinates, calculating the positions of the jacking pipes in the deviation sections to the ground surface in a reverse mode, measuring and positioning, and calculating the in-situ restoration jacking force according to the shear strength, the tensile strength and the safety coefficient of the soil;

s2, verifying the ground surface positioning, marking the ground surface positioning as a soil loosening guide hole after the ground surface positioning passes, further enlarging the aperture of the soil loosening guide hole, and performing soil loosening construction on the area near the top pipe;

s3, determining a ground surface jacking point according to the position of the jacking pipe, vertically drilling a hole downwards to the bottom of the jacking pipe at the jacking point, then implanting a reaction channel steel and a jack into the vertical drilling hole of the jacking point, and applying jacking force to the jacking pipe through the jack to horizontally correct the deviation;

s4, after horizontal deviation rectification is completed, properly lifting the jacking pipe and stabilizing the bottom of the jacking pipe by using a high polymer grouting technology;

and S5, after the jacking pipe is rectified to be in place, filling and sealing the periphery of the jacking pipe section by using high polymers, and then replacing and fixing the soil loosening area, the soil loosening guide hole and the vertical drilling hole of the jacking point.

Further, a deformation monitoring system needs to be established before the pushing pipe horizontal pushing reset in the step S3, the deformation monitoring system includes an earth surface monitoring system and a monitoring system inside the pushing pipe, and the implementation manner of the monitoring system includes setting a monitoring frequency and continuous monitoring.

Further, the method for implanting the reaction channel steel and the jack in the step S3 specifically includes:

according to the embedding depth of the jacking pipe, the jack is fixed on the channel steel, then the counterforce channel steel is implanted into the vertical drilling hole of the pushing point according to the pushing direction, and the supporting counterforce of the jack is provided by means of the counterforce channel steel and the side wall soil body.

Further, in the step S3, the horizontal deviation rectifying process is performed by simultaneously controlling a plurality of jacks to synchronously apply jacking force by using a hydraulic balance valve.

Further, the safety factor in step S1 is 1.3 or more.

Further, the verification method in the step S2 is specifically to perform verification by using a drilling machine to drill holes vertically.

Further, the method for scarifying the soil in the area near the top pipe in step S2 is specifically implemented by using slurry wall protection clean water jet drilling or slurry wall protection clean water swing jet drilling.

Further, the method for vertically drilling the hole with the pushing point downward in the step S3 is specifically implemented by using a mud retaining wall positive circulation drilling machine.

Further, the replacement fixing material in the step S5 is cement slurry or plain concrete.

A trenchless in-situ deviation rectification design construction method for jacking pipes is also suitable for trenchless in-situ deviation rectification design construction of rectangular jacking pipes and underground comprehensive pipe galleries.

The invention has the following beneficial effects:

(1) the trenchless in-situ deviation rectification design and construction method for the jacking pipe, provided by the invention, is based on the essence of jacking pipe deviation rectification, provides a design and construction idea of synchronous implementation of soil loosening and deviation rectification, reduces the deviation rectification resistance, improves the deviation rectification precision control, introduces a monitoring control measure in the deviation rectification process, improves the deviation rectification control precision, solves the deviation problem of the jacking pipe functionally and is safe and reliable.

(2) The invention loosens soil and corrects the deviation on the two sides of the jacking pipe respectively, has clear division, can reduce the deviation correcting resistance of the jacking pipe by means of the soil loosening process and avoids the strength damage caused by overlarge jacking force of the jacking pipe. The deviation rectifying process is flexible, and single-point deviation rectifying or multi-point synchronous deviation rectifying can be selected according to the magnitude of the deviation rectifying thrust.

(3) The soil loosening process can control the deviation rectifying requirement on a certain function, and in the pushing deviation rectifying process, secondary precision control is realized by adopting monitoring control measures, so that the deviation rectifying work can be ensured to be accurate and in place.

(4) The correcting jacking pipe is stable and reliable. And after the jacking pipe is horizontally rectified in place, if necessary, the jacking pipe is vertically rectified and lifted by adopting a high polymer grouting technology. By means of the rapid expansion and hardening of the high polymer material and the peripheral medium and the reliable connection performance, the fixing of the deviation-corrected jacking pipe can be rapidly realized, and the stable and reliable working state of the deviation-corrected jacking pipe is ensured.

(5) The pipe-jacking trenchless in-situ deviation rectification design construction method provided by the invention can meet trenchless in-situ deviation rectification of rectangular pipe jacking and underground comprehensive pipe galleries within a certain depth range and under the surrounding environmental conditions.

(6) The invention has safe and rapid construction, clear division of labor, continuous operation according to the construction sequence on site and high operation efficiency.

Drawings

FIG. 1 is a construction cross-section of trenchless in-situ deviation rectification design of the jacking pipe of the invention;

FIG. 2 is a cross-sectional view of the trenchless in-situ rectification implementation effect of the jacking pipe of the invention;

FIG. 3 is a comparison graph of the effect of the trenchless in-situ rectification implementation front plane of the jacking pipe of the invention;

FIG. 4 is a comparison graph of the plane effect of the pipe jacking after trenchless in-situ rectification implementation;

reference numerals

1. Jacking pipes in a deviation section; 2. the earth surface; 3. a soil loosening region; 4. loosening guide holes; 5. a pushing point; 6. vertically drilling a pushing point; 7. counterforce channel steel; 8. a jack; 9. a high polymer; 10. cement slurry; 11. plain concrete.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to specific examples, but the present invention is not limited to these examples.

Referring to fig. 1-4, a trenchless in-situ deviation rectification design construction method for jacking pipes includes the following steps:

s1, establishing a relation between the jacking pipes and the ground surface coordinates, calculating the position of the deviation section jacking pipe 1 back to the ground surface 2, measuring and positioning, and calculating the in-situ restoration jacking force according to the shear strength, the tensile strength and the safety coefficient of the soil.

Wherein the safety coefficient is 1.3 or more.

S2, verifying the ground surface positioning, marking the ground surface positioning as the loosening guide hole 4, and loosening the soil in the vicinity of the pipe plug after further enlarging the hole diameter of the loosening guide hole 4.

The construction method of the soil loosening region 3 comprises the following specific steps: the method comprises the steps of verifying the real position of a deviation section jacking pipe 1 in a vertical drilling mode of a micro-drilling machine, identifying the verified correct position as a soil loosening guide hole 4, and identifying the plane position of the soil loosening guide hole 4 by paint spraying on the earth surface 2 to ensure that the precision meets the construction requirements.

The aperture of the soil loosening guide hole 4 is further enlarged, and soil loosening construction in the area near the top pipe can be implemented by slurry wall protection clear water rotary jetting drilling or slurry wall protection clear water swing jetting drilling in combination with the upper space of the operation area.

S3, determining a ground surface jacking point 5 according to the position of the jacking pipe, vertically drilling a hole downwards at the jacking point 5 to the bottom of the jacking pipe, then implanting a reaction channel steel 7 and a jack 8 into the jacking point vertical drilling hole 6, and applying jacking force to the jacking pipe through the jack to horizontally correct the deviation.

The specific method comprises the following steps: and determining the ground surface jacking point 5 according to the position of the jacking pipe, and simultaneously marking the plane position of the jacking point 5 by adopting spray painting on the ground surface so as to ensure that the precision meets the construction requirement. And (3) vertically drilling downwards at the pushing point 5, forming a hole by using a mud retaining wall positive circulation drilling machine, deeply drilling to the bottom of the jacking pipe, fixing a jack 8 on a counterforce channel steel 7 according to the burial depth of the jacking pipe, implanting the counterforce channel steel 7 into the vertical drilling hole 6 of the pushing point according to the pushing direction, and providing a supporting counterforce of the jack 8 by means of the counterforce channel steel 7 and a side wall soil body.

In order to control reasonable movement of the deviation rectifying process of the deviation section jacking pipe 1 and prevent surface subsidence or uplift, a good table and monitoring system in the jacking pipe is established in advance, and monitoring frequency is reasonably set and continuous monitoring is carried out.

In the specific implementation process, the hydraulic balance valves can be used for simultaneously controlling the jacks 8 to synchronously apply jacking force, if the jacking force is insufficient, the positions of the jacks 8 can be adjusted, and the number of the jacks 8 is appropriately increased, so that horizontal deviation correction is realized.

S4, after horizontal deviation rectification is completed, properly lifting the jacking pipe and stabilizing the bottom of the jacking pipe by using a high polymer 9 grouting technology;

the deviation of the jacking pipe not only comprises left and right deviation, but also comprises up and down deviation, the first aim of the high polymer 9 grouting is to solve the up and down deviation, namely to lift and stabilize the bottom of the jacking pipe, and simultaneously solve the problem of substrate looseness in the horizontal deviation process, wherein the high polymer grouting at the bottom of the pipe is to drill a hole in the pipeline, drill the pipe wall and perform grouting from inside to outside.

And S5, after the jacking pipe is rectified to be in place, filling and sealing the periphery of the jacking pipe section by using high polymer, and then replacing and fixing the soil loosening region 3, the soil loosening guide hole 4 and the jacking point vertical drilling hole 6.

Wherein, the high polymer 9 is used for filling and sealing the periphery of the top pipe section, so as to control the secondary offset of the pipeline.

The material for replacement and fixation can be filled with cement grout 10, and can also be backfilled with plain concrete 11, so that trenchless in-situ deviation rectification construction of the jacking pipe can be completed.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and is not intended to limit the practice of the invention to these embodiments. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.