阅读说明：本技术 一种泥水平衡顶管系统及其施工方法 (Slurry balance pipe jacking system and construction method thereof ) 是由 周颖 张玉蓉 曾令涛 曹海艳 潘巍 胡宇 万守芳 于 2021-01-19 设计创作，主要内容包括：本发明公开了一种泥水平衡顶管系统及其施工方法。包括有泥浆沉淀池,泥浆沉淀池的内左侧为沉淀池,泥浆沉淀池的内右侧为调整池,沉淀池的上方设有泥水分离机,调整池内设有搅拌机,调整池右侧的下端连接有送水泵,送水泵经第一送水管连接有第二送水管,第二送水管连接有顶管掘进机的泥水仓。本发明具有泥水循环使用,减小用水量,减低成本,避免环境造成污染,易将泥渣带出,排泥管内不易沉淀,避免防粘土遇水膨胀,容易造成土壁塌落破坏,并且起到排泥渣、平衡地下水的作用,掘面的稳定性好,同时便于泥渣分离处理运输,还可以减少顶管顶进过程中的管节与土体的摩阻力,施工难度低的有益效果。(The invention discloses a slurry balance pipe jacking system and a construction method thereof. Including the mud sedimentation tank, the interior left side of mud sedimentation tank is the sedimentation tank, and the interior right side of mud sedimentation tank is the adjustment pond, and the top of sedimentation tank is equipped with mud-water separation machine, is equipped with the mixer in the adjustment pond, and the lower extreme on adjustment pond right side is connected with the delivery pump, and the delivery pump is connected with the second delivery pipe through first delivery pipe, and the second delivery pipe is connected with the muddy water storehouse of push-pipe entry driving machine. The invention has the advantages of recycling mud water, reducing water consumption, lowering cost, avoiding environmental pollution, easily taking out mud residues, preventing the mud pipe from being precipitated, preventing clay from expanding when meeting water and easily causing soil wall collapse damage, playing the roles of discharging mud residues and balancing underground water, having good stability of digging surface, facilitating separation, treatment and transportation of mud residues, reducing the frictional resistance between a pipe joint and a soil body in the jacking process of a jacking pipe and having low construction difficulty.)

1. The utility model provides a muddy water balance push pipe system which characterized in that: the device comprises a mud sedimentation tank (3), wherein a sedimentation tank (8) is arranged on the inner left side of the mud sedimentation tank (3), an adjusting tank (9) is arranged on the inner right side of the mud sedimentation tank (3), a mud-water separator (1) is arranged above the sedimentation tank (8), a stirrer (2) is arranged in the adjusting tank (9), a water feeding pump (4) is connected to the lower end of the right side of the adjusting tank (9), the water feeding pump (4) is connected with a second water feeding pipe (17) through a first water feeding pipe (5), the second water feeding pipe (17) is connected with a mud-water cabin of a pipe-jacking machine (14), the mud-water cabin is connected with a first mud discharging pipe (18), the first mud discharging pipe (18) is connected with a mud discharging pump (12), the mud discharging pump (12) is connected with a second mud discharging pipe (10), and the second mud discharging pipe.

2. The slurry balance pipe jacking system according to claim 1, wherein: the right side of the pipe-jacking tunneling machine (14) is provided with a pipe jacking (13), the pipe jacking (13) is movably positioned on a pushing stand (15), the left side of the pipe jacking (13) is provided with a main jacking system (19), and the main jacking system (19) is connected with a hydraulic working station (7).

3. The slurry balance pipe jacking system according to claim 1, wherein: a water inlet valve (16) is arranged on the first water supply pipe (5); and a sludge discharge flow detector (11) is arranged on the second sludge discharge pipe (10).

4. The slurry balance pipe jacking system according to claim 2, wherein: the mud-water separator (1), the stirrer (2), the water feeding pump (4), the pipe-jacking tunneling machine (14), the sludge discharge pump (12), the main jacking system (19), the hydraulic workstation (7) and the sludge discharge flow detector (11) are connected with a central operating platform (6).

5. The slurry balance pipe jacking system according to claim 4, wherein: the main jacking system (19) comprises a rear seat sizing block, a jack and a jack bracket; the mud-water separator (1) comprises a vibrating screen and a cyclone.

6. The slurry balance pipe jacking system according to claim 1, wherein: the first sludge discharge pipe (18), the sludge discharge pump (12), the second sludge discharge pipe (10), the sludge-water separator (1) and the sedimentation tank (8) are a sludge-water type sludge discharge system; the adjusting tank (9), the stirrer (2), the water feeding pump (4), the first water feeding pipe (5) and the second water feeding pipe (17) are thixotropic slurry systems.

7. The construction method of the muddy water balance push pipe system as set forth in any one of claims 1 to 6, characterized in that: the method comprises the following steps:

A. before construction: adding soil into the adjusting tank (9), working the stirrer (2), and stirring the muddy water in the adjusting tank (9) by the stirrer (2) to obtain slurry inlet muddy water, wherein the specific gravity of the slurry inlet muddy water is 1.05-1.10;

B. during construction: the pipe-jacking tunneling machine (14) works to dig rocks, the water-feeding pump (4) works, the water-feeding pump (4) pressurizes the slurry-entering muddy water in the step A and conveys the slurry-entering muddy water to a muddy water bin of the pipe-jacking tunneling machine (14) through a first water-feeding pipe (5) and a second water-feeding pipe (17), the slurry-entering muddy water and the slurry in the muddy water bin are mixed to form slurry-discharging muddy water, the specific gravity of the slurry-discharging muddy water is 1.25-1.30, the sludge-discharging pump (12) works at the same time, the slurry-discharging muddy water is pumped out of the muddy water bin of the pipe-jacking tunneling machine (14) through a first sludge-discharging pipe (18) and enters a second sludge-discharging pipe (10), the slurry-discharging muddy water in the second sludge-discharging pipe (10) enters a muddy water separator (1), the muddy water is separated by the muddy water separator (1), the muddy water separated by the muddy water separator (1) is discharged, and the muddy water separated by the muddy water in a sedimentation tank (8), precipitating in a sedimentation tank (8), feeding the slurry precipitated in the sedimentation tank (8) into an adjusting tank (9), and repeating the steps A and B for cyclic use;

C. during construction: when the pipe jacking tunneling machine (14) works to dig rocks, the hydraulic working station (7) works, the hydraulic working station (7) provides high-pressure oil to provide horizontal thrust for the main jacking system (19), and the main jacking system (19) pushes the pipe jacking (13) to the receiving well section by section from the working well.

8. The construction method of the mud-water balance pipe jacking system according to claim 7, wherein: in the steps A to C, the operation control is completed through a central operation table (6).

9. The construction method of the mud-water balance pipe jacking system according to claim 7, wherein: in the step A, the soil added into the adjusting tank (9) is bentonite.

10. The construction method of the mud-water balance pipe jacking system according to claim 7, wherein: in the step B, a water inlet valve (16) is arranged on the first water supply pipe (5), and the flow of the slurry and the muddy water is adjusted through the water inlet valve (16); and a mud discharge flow detector (11) is arranged on the second mud discharge pipe (10), and the mud discharge flow of the second mud discharge pipe (10) is detected through the mud discharge flow detector (11).

Technical Field

The invention relates to a slurry balance pipe jacking, in particular to a slurry balance pipe jacking system and a construction method thereof.

Background

The project is a water quality improving project of a pipe network matched with sewage treatment plants such as noble steel and the like in south Ming district of Guiyang city, and is positioned from a south Ming district open-sun tunnel road to a jade plant road in the south Ming district of Guiyang city. The underground pipeline and the pipe jacking pipeline are prefabricated reinforced concrete round pipes, the inner diameter is 2400mm, the wall thickness is 240mm, and the length of each section is 2.0 m; the pipe jacking line is provided with a round working well and a rectangular working well and a receiving well. According to geological data and on-site investigation, the site of the project is a shallow-buried pipe jacking, and the crossing area of the pipe jacking is a municipal road with larger traffic flow;

the construction section is long distance pipe-jacking construction, need discharge the mud sediment at the in-process that the pipe-jacking entry driving machine excavated rock, and among the current mud sediment discharge technique, need intake and carry to the muddy water storehouse of pipe-jacking entry driving machine, takes out the mud sediment in the muddy water storehouse and discharges, has following technical problem: the water density is low, sludge is not easy to be brought out, the sludge is easy to precipitate in the sludge discharge pipe, the water loss is large, and according to geological data, a soil weak permeable sludge layer penetrated by the top pipe is prevented from soil expansion when encountering water, so that the soil wall is easy to collapse and damage, and the stability of the digging surface is poor; the water consumption is large, the cost is high, the water resource waste is caused, and the environment is polluted; and after the water is mixed with the sludge, the sludge is inconvenient to treat and transport; meanwhile, if the rock layer of the jacking pipe section is in the middle-aged dolomite limestone, the rock body is broken, the integrity is poor, the geological structure is complex, the pipe joint and the soil body have large frictional resistance in the jacking process of the jacking pipe, and the construction difficulty is large.

Disclosure of Invention

The invention aims to provide a muddy water balance pipe jacking system and a construction method thereof. The invention has the characteristics of recycling mud water, reducing water consumption, lowering cost, avoiding environmental pollution, easily taking out mud residues, preventing the mud pipe from being precipitated, preventing clay from expanding when meeting water and easily causing soil wall collapse damage, playing the roles of discharging mud residues and balancing underground water, having good stability of a digging surface, facilitating separation, treatment and transportation of mud residues, reducing the frictional resistance between a pipe joint and a soil body in the jacking process of a jacking pipe and having low construction difficulty.

The technical scheme of the invention is as follows:

the utility model provides a muddy water balance push pipe system, including mud sedimentation tank, mud sedimentation tank's interior left side is the sedimentation tank, mud sedimentation tank's interior right side is the adjustment pond, the top of sedimentation tank is equipped with mud-water separator, be equipped with the mixer in the adjustment pond, the lower extreme on adjustment pond right side is connected with the delivery pump, the delivery pump is connected with the second delivery pipe through first delivery pipe, the second delivery pipe is connected with the muddy water storehouse of push pipe entry driving machine, the muddy water storehouse is connected with first mud pipe, first mud pipe is connected with the dredge pump, the dredge pump is connected with the second dredge pipe, the second dredge pipe is connected with mud-water separator.

In the slurry-water balance pipe jacking system, a pipe jacking is arranged on the right side of the pipe jacking tunneling machine and movably located on the pushing stand, and a main jacking system is arranged on the left side of the pipe jacking and connected with a hydraulic workstation.

In the mud-water balance pipe jacking system, a water inlet valve is arranged on the first water feeding pipe; and a sludge discharge flow detector is arranged on the second sludge discharge pipe.

In the mud-water balance pipe jacking system, the mud-water separator, the stirrer, the water feeding pump, the pipe jacking tunneling machine, the sludge discharge pump, the main jacking system, the hydraulic workstation and the sludge discharge flow detector are connected with a central operation platform.

In the mud-water balance pipe jacking system, the main jacking system comprises a rear seat sizing block, a jack and a jack support; the mud-water separator comprises a vibrating screen and a cyclone.

In the mud-water balance pipe jacking system, the first mud discharge pipe, the mud discharge pump, the second mud discharge pipe, the mud-water separator and the sedimentation tank are mud-water type mud discharge systems; the adjusting tank, the stirrer, the water feeding pump, the first water feeding pipe and the second water feeding pipe are thixotropic slurry systems.

The construction method of the mud-water balance pipe jacking system comprises the following steps:

A. before construction: adding soil into the adjusting tank, working by using a stirrer, and stirring the muddy water in the adjusting tank by using the stirrer to obtain slurry inlet muddy water, wherein the specific gravity of the slurry inlet muddy water is 1.05-1.10;

B. during construction: the pipe-jacking tunneling machine works to dig rocks, the water pump works, the water pump pressurizes the slurry inlet mud water in the step A and conveys the slurry inlet mud water into a mud water bin of the pipe-jacking tunneling machine through the first water delivery pipe and the second water delivery pipe, the slurry inlet mud water and the slurry in the mud water bin are mixed to form slurry discharge mud water, the specific gravity of the slurry discharge mud water is 1.25-1.30, the mud pump works simultaneously, the mud pump pumps the slurry discharge mud water out of the mud water bin of the pipe-jacking tunneling machine through the first mud discharge pipe and enters the second mud discharge pipe, the slurry discharge mud water in the second mud discharge pipe enters a mud-water separator, the mud-water separator separates the slurry, mud residues separated by the mud-water separator are discharged, the slurry separated by the mud-water separator enters a sedimentation tank and is precipitated by the sedimentation tank, the slurry precipitated by the sedimentation tank enters an adjusting tank, and the steps A and B are repeated for cyclic use;

C. during construction: when the pipe-jacking tunneling machine works to tunnel rocks, the hydraulic workstation works, the hydraulic workstation provides high-pressure oil to provide horizontal thrust for the main jacking system, and the main jacking system pushes the pipe jacking to the receiving well section by section from the working well.

In the construction method of the mud-water balance pipe jacking system, the operation control in the steps A to C is completed through a central operation platform.

In the construction method of the mud-water balance pipe jacking system, in the step a, the soil added into the adjusting tank is bentonite.

In the construction method of the slurry balance pipe jacking system, in the step B, a water inlet valve is arranged on the first water supply pipe, and the slurry discharge slurry flow is adjusted through the water inlet valve; and a mud discharge flow detector is arranged on the second mud discharge pipe, and the mud discharge flow of the second mud discharge pipe is detected through the mud discharge flow detector.

Compared with the prior art, the invention has the beneficial effects of recycling muddy water, reducing water consumption, lowering cost, avoiding environmental pollution, easily bringing out sludge, preventing sedimentation in the sludge discharge pipe, preventing clay from expanding when meeting water, easily causing soil wall collapse and damage, discharging sludge and balancing underground water, having good stability of a digging surface, facilitating separation, treatment and transportation of sludge, reducing frictional resistance between a pipe joint and a soil body in the jacking process of a jacking pipe and having low construction difficulty.

Drawings

FIG. 1 is a working principle diagram of the muddy water balance pipe jacking system of the invention.

The labels in the figure are: 1-a mud-water separator, 2-a stirrer, 3-a mud sedimentation tank, 4-a water feeding pump, 5-a first water feeding pipe, 6-a central operation platform, 7-a hydraulic work station, 8-a sedimentation tank, 9-an adjusting tank, 10-a second mud discharging pipe, 11-a mud discharging flow detector, 12-a mud discharging pump, 13-a top pipe, 14-a top pipe tunneling machine, 15-a pushing rack table, 16-a water inlet valve, 17-a second water feeding pipe, 18-a first mud discharging pipe and 19-a main jacking system.

Detailed Description

The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.

Referring to fig. 1, example: the water quality improvement project of the pipe network matched with sewage treatment plants such as noble steel and the like in the south-open area of Guiyang city is positioned from the south-open area of Guiyang city to the jade plant. The underground pipeline and the pipe jacking pipeline are prefabricated reinforced concrete round pipes, the inner diameter is 2400mm, the wall thickness is 240mm, and the length of each section is 2.0 m; the project starting point is positioned near the twenty-ninth school gate of Guiyang city on the sand-washed middle road, the project end point is positioned at the intersection of the jade plant road and the peach garden road, the existing south Ming river sewage interception ditch is connected, and the top pipe crossing area is a municipal road with large traffic flow; the construction section is long-distance pipe jacking construction, and the pipe jacking resistance is large; the rock layer of the pipe jacking section is in the middle-stroke dolomite limestone, and the rock body is in a broken state and has poor integrity; the geological structure is complex, the surrounding rock strength is low, and the shallow buried type is adopted; the total 1125m of K0+180 to K1+355 pipelines are designed as starting points and the construction is carried out by adopting the technology of the invention.

The utility model provides a muddy water balance push pipe system, including mud sedimentation tank 3, the interior left side of mud sedimentation tank 3 is sedimentation tank 8, the interior right side of mud sedimentation tank 3 is adjustment tank 9, the top of sedimentation tank 8 is equipped with mud-water separator 1, be equipped with mixer 2 in the adjustment tank 9, the lower extreme on adjustment tank 9 right side is connected with delivery pump 4, delivery pump 4 is connected with second delivery pipe 17 through first delivery pipe 5, second delivery pipe 17 is connected with the muddy water storehouse of push pipe entry driving machine 14, the muddy water storehouse is connected with first mud pipe 18, first mud pipe 18 is connected with dredge pump 12, dredge pump 12 is connected with second dredge pipe 10, second dredge pipe 10 is connected with mud-water separator 1.

A top pipe 13 is arranged on the right side of the top pipe tunneling machine 14, the top pipe 13 is movably positioned on a pushing stand 15, a main jacking system 19 is arranged on the left side of the top pipe 13, and the main jacking system 19 is connected with a hydraulic working station 7; when the pipe-jacking tunneling machine 14 works to conduct rock excavation, the hydraulic working station 7 works, the hydraulic working station 7 provides high-pressure oil to provide horizontal thrust for the main jacking system 19, and the main jacking system 19 pushes the pipe jacking 13 to the receiving well from the working well one by one

A water inlet valve 16 is arranged on the first water supply pipe 5; and a sludge discharge flow detector 11 is arranged on the second sludge discharge pipe 10.

The mud-water separator 1, the stirrer 2, the water feeding pump 4, the pipe-jacking tunneling machine 14, the sludge discharge pump 12, the main jacking system 19, the hydraulic workstation 7 and the sludge discharge flow detector 11 are connected with a central operation platform 6; the operation control of the mud-water separator 1, the stirrer 2, the water feeding pump 4, the pipe-jacking tunneling machine 14, the sludge discharge pump 12, the main jacking system 19, the hydraulic workstation 7 and the sludge discharge flow detector 11 is completed through the central operation platform 6.

The main jacking system 19 comprises a rear seat sizing block, a jack and a jack bracket; the mud-water separator 1 comprises a vibrating screen and a cyclone; coarser particles, typically above 1.0mm, are separated by a vibrating screen and finer particles are separated again by a cyclone. If the particles are fine, the separated sludge has a high water content, and a certain proportion of water absorbent, such as acrylate, can be added into the separated sludge, and the water absorbent can absorb the water in the sludge, so that the originally flowing sludge is changed into transportable dry sludge.

The first sludge discharge pipe 18, the sludge discharge pump 12, the second sludge discharge pipe 10, the sludge-water separator 1 and the sedimentation tank 8 are a sludge-water type sludge discharge system; the adjusting tank 9, the stirrer 2, the water feeding pump 4, the first water feeding pipe 5 and the second water feeding pipe 17 are thixotropic slurry systems.

The construction method of the slurry balance pipe jacking system comprises the following steps:

A. before construction: adding soil into the adjusting tank 9, operating the stirrer 2, and stirring the muddy water in the adjusting tank 9 by the stirrer 2 to obtain slurry inlet muddy water, wherein the specific gravity of the slurry inlet muddy water is 1.05-1.10; in the step A, the soil added into the adjusting tank 9 is bentonite;

B. during construction: the pipe-jacking tunneling machine 14 works to dig rocks, the water-sending pump 4 works, the water-sending pump 4 pressurizes the slurry inlet mud water in the step A and sends the slurry inlet mud water to a mud water bin of the pipe-jacking tunneling machine 14 through the first water-sending pipe 5 and the second water-sending pipe 17, the slurry inlet mud water and the slurry in the mud water bin are mixed to form slurry discharge mud water, the specific gravity of the slurry discharge mud water is 1.25-1.30, the sludge-discharging pump 12 works at the same time, the slurry discharge mud water is pumped out of the mud water bin of the pipe-jacking tunneling machine 14 through the first sludge-discharging pipe 18 by the sludge-discharging pump 12 and enters the second sludge-discharging pipe 10, the slurry discharge in the second sludge-discharging pipe 10 enters the mud-water separator 1, the slurry discharge mud water is separated by the mud-water separator 1, the sludge separated by the mud-water separator 1 enters the sedimentation tank 8 and is precipitated by the sedimentation tank 8, and the slurry precipitated by the sedimentation tank 8 enters the adjusting tank 9, repeating the step A and the step B for cyclic use;

C. during construction: when the pipe-jacking tunneling machine 14 works to excavate rocks, the hydraulic working station 7 works, the hydraulic working station 7 provides high-pressure oil to provide horizontal thrust for the main jacking system 19, and the main jacking system 19 pushes the pipe jacking 13 to a receiving well from a working well one by one.

In the steps A to C, the operation control is completed through the central operation table 6.

In the step B, a water inlet valve 16 is arranged on the first water supply pipe 5, and the flow of the slurry discharge mud water is adjusted through the water inlet valve 16; and a sludge discharge flow detector 11 is arranged on the second sludge discharge pipe 10, and the sludge discharge flow of the second sludge discharge pipe 10 is detected through the sludge discharge flow detector 11.

The invention has the following beneficial effects:

1. the working principle diagram of the mud-water balance pipe jacking system is shown in figure 1, when a pipe jacking tunneling machine works to dig rocks, a hydraulic work station works, the hydraulic work station provides high-pressure oil to provide horizontal thrust for a main jacking system, and the main jacking system pushes the pipe jacking to a receiving well from a working well one by one. And before construction: adding soil into the adjusting tank, operating the stirrer, stirring the muddy water in the adjusting tank by the stirrer to obtain slurry inlet muddy water, operating the pipe-jacking machine to dig rocks, operating the water pump, pressurizing the slurry inlet muddy water in the step A by the water pump, conveying the slurry inlet muddy water into a muddy water bin of the pipe-jacking machine through a first water conveying pipe and a second water conveying pipe, mixing the slurry inlet muddy water with the mud in the muddy water bin to form slurry discharge muddy water, simultaneously operating the mud pump, pumping the slurry discharge muddy water out of the muddy water bin of the pipe-jacking machine through a first mud discharge pipe by the mud pump into a second mud discharge pipe, feeding the slurry discharge muddy water in the second mud discharge pipe into a mud-water separator, separating the slurry discharge by the mud-water separator, discharging the mud residues separated by the mud-water separator through the mud-water separator, feeding the mud separated by the mud-water separator into a settling tank, settling the mud settled in the settling tank into the adjusting tank, forming a muddy water circulating system.

2. Mud-water type mud discharging system: the mud-water type mud discharging system comprises a first mud discharging pipe, a mud discharging pump, a second mud discharging pipe, a mud-water separator and a sedimentation tank, wherein the mud-water type mud discharging system is used for discharging mud residues on one hand and balancing underground water on the other hand.

After the sludge and the muddy water enter the muddy water separator, as the muddy water separator comprises the vibrating screen and the cyclone, the vibrating screen separates out coarse particles, generally particles with the particle size of more than 1.0mm, and then the cyclone separates out fine particles. If the particles are fine, the separated sludge has a high water content, and a certain proportion of water absorbent, such as acrylate, can be added into the separated sludge, and the water absorbent can absorb the water in the sludge, so that the originally flowing sludge is changed into transportable dry sludge.

Meanwhile, the stratum contains more sundries and shells, the sundries and the shells entering the muddy water circulating system easily block the first mud discharging pipe, the mud discharging pump and the second mud discharging pipe, so a filter stone box needs to be additionally arranged in front of the mud discharging pump to prevent the sundries and the shells from blocking the pump impeller, meanwhile, the sundries and the shells in the filter stone box need to be timely cleaned, and the circulating system flow is guaranteed to be free of blocking.

3. Thixotropic slurry system: the thixotropic slurry system not only provides slurry inlet slurry for a slurry cabin of the pipe-jacking tunneling machine, but also can reduce the frictional resistance between a pipe joint and a soil body in the jacking process of the pipe jacking by the main jacking system.

4. In the slurry balance pipe jacking system, the blending of slurry inlet slurry and slurry discharge slurry is one of the conditions for ensuring the stability of the excavation surface, and is an important link for ensuring the normal delivery of slurry. According to geological data, slurry with high density and small water loss amount is adopted for a soil weak permeable mud layer through which a jacking pipe passes so as to prevent clay from collapsing and damaging due to water expansion, so that the specific gravity of the slurry inlet mud water is adjusted to be 1.05-1.10, and the specific gravity of the slurry discharge mud water is 1.25-1.30 in a test in construction, so that the specific gravity of the slurry discharge mud water can ensure that fine sand is not easy to precipitate in a first mud discharge pipe and a second mud discharge pipe and can also ensure the stability of an excavation surface.

5. For water quality improvement projects of pipe networks matched with sewage treatment plants such as noble steel and the like in south-open areas of Guiyang city, the water quality improvement projects are positioned from the south-open area open-sun tunnel road to the jade plant road in the south-open areas of Guiyang city. The underground pipeline and the pipe jacking pipeline are prefabricated reinforced concrete round pipes, the inner diameter is 2400mm, the wall thickness is 240mm, and the length of each section is 2.0 m; the project starting point is positioned near the twenty-ninth school gate of Guiyang city on the sand-washed middle road, the project end point is positioned at the intersection of the jade plant road and the peach garden road, the existing south Ming river sewage interception ditch is connected, and the top pipe crossing area is a municipal road with large traffic flow; the construction section is long-distance pipe jacking construction, and the pipe jacking resistance is large; the rock layer of the pipe jacking section is in the middle-stroke dolomite limestone, and the rock body is in a broken state and has poor integrity; the geological structure is complex, the surrounding rock strength is low, and the shallow buried type is adopted; the total 1125m of K0+180 to K1+355 pipelines are designed, the construction is carried out by adopting the technology of the invention, and the quality inspection and evaluation standards of the jacking pipe are shown in the following table 1:

the construction method of the muddy water balance pipe jacking system meets the quality inspection and evaluation standards of the pipe jacking, has no collapse damage, and is safe and reliable in construction.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are within the scope of the present invention without departing from the technical spirit of the present invention.