A multifunctional micro-pipe jacking equipment set and construction method

Abstract

The present invention discloses a multifunctional micro-pipe jacking complete set of equipment and a construction method, belonging to the technical field of pipeline construction, comprising a micro-pipe jacking rig arranged in a working well and a pipe jacking device arranged in a receiving well; the pipe jacking device comprises a pipe jacking machine base, one end of the pipe jacking machine base is fixedly provided with a pipe jacking cylinder, the output end of the pipe jacking cylinder is provided with a pressure plate, the pipe jacking base is provided with a pipe bracket, the pipe bracket is provided with a pipe, the end of the pipe close to the pipe jacking cylinder is in conflict with the pressure plate, and the end of the pipe away from the pipe jacking cylinder is connected to a reamer; by utilizing the micro-pipe jacking rig and the pipe jacking device, precisely positioned guide hole construction can be carried out, thereby ensuring the accuracy of construction, and the jacking and pulling back of the pipe can also be precisely controlled to prevent excessive bending or damage of the pipe in the soil layer.

Description

Technical Field

[0001] The present invention relates to the technical field of pipeline construction, and in particular to a multifunctional micro-pipe jacking complete set of equipment and a construction method. Background Art

[0002] Underground pipelines are pipes laid underground for transporting liquids, gases or loose solids. Modern underground pipelines come in many types, with various cross-sectional forms such as circular, elliptical, semi-elliptical, multi-centered, oval, rectangular (single-hole, double-hole and multi-hole), and horseshoe-shaped. They are constructed of materials such as steel, cast iron, concrete, reinforced concrete, prestressed concrete, brick, stone, asbestos cement, clay, plastic, and fiberglass (reinforced plastic). Currently, when laying underground pipelines, there are problems such as large construction site requirements, difficult entry and exit, and large elevation errors, and improvements are urgently needed. Summary of the Invention

[0003] In order to overcome the defects of the prior art, the present invention proposes a multifunctional micro pipe jacking equipment set and a construction method.

[0004] The present invention adopts the following technical solutions:

[0005] The present invention provides a multifunctional micro-pipe jacking equipment set, including a micro-pipe jacking rig arranged in a working well and a pipe jacking device arranged in a receiving well; the pipe jacking device includes a pipe jacking machine base, a pipe jacking cylinder is fixedly provided at one end of the pipe jacking machine base, a pressure plate is provided at the output end of the pipe jacking cylinder, a pipe bracket is provided on the pipe jacking machine base, a pipe is provided on the pipe bracket, the end of the pipe close to the pipe jacking cylinder is in contact with the pressure plate, and the end of the pipe away from the pipe jacking cylinder is connected to the reamer; the micro-pipe jacking rig includes a base, a power clamping device for clamping and rotating a guide drill rod is provided on the base, the power clamping device is movably arranged on the base, a clamping frame is provided on one side of the power clamping device, one end of the guide drill rod is fixedly clamped on the power clamping device, and the other end of the guide drill rod penetrates the clamping frame and is connected to the reamer.

[0006] The preferred technical solution of the present invention is that the pipe jacking machine base includes a supporting rear plate and a supporting bottom plate, the supporting rear plate is vertically arranged at one end of the supporting bottom plate, the supporting rear plate is an arc-shaped plate, the supporting rear plate fits the inner wall of the receiving well, and the pipe jacking cylinder is fixedly installed on the supporting rear plate.

[0007] The preferred technical solution of the present invention is that the pipe bracket includes a stabilizing device and a lifting device, the stabilizing device is arranged on the supporting base and located on both sides of the pipe, and the lifting device is arranged on the supporting base and located on both sides of the bottom end of the pipe.

[0008] The preferred technical solution of the present invention is that the lifting device includes several lifting bases, which are fixedly mounted on the supporting base plate and distributed on both sides of the bottom end of the pipe. The top of the lifting base is provided with an inclined surface, and a lifting bracket is installed on the inclined surface. The lifting bracket is installed with a roller, and the roller is in contact with the outer surface of the pipe.

[0009] A preferred technical solution of the present invention is that a mounting ring is fixedly provided on the surface of the pressure plate that contacts the pipeline.

[0010] The present invention provides a construction method using a multifunctional micro-pipe jacking complete set of equipment, comprising the following construction steps:

[0011] S1, alignment measurement;

[0012] Set up the RDK (or theodolite) on the center line between the working well and the receiving well to determine the position of the working well along the line passing through the center point, draw a level line connecting the two points, and use a plumb line and a tape measure to determine the equipment position of the micro-jacking pipe drilling rig;

[0013] S2, micro-jacking rig installation;

[0014] Lift the multifunctional micro-jacking drill into the working well, with its back close to the well wall, install and debug the multifunctional micro-jacking drill according to the designed elevation and drilling trajectory, and secure it;

[0015] S3, installation of pipe jacking device;

[0016] Hoist the pipe jacking device into the receiving well with its back close to the well wall, install and debug the pipe jacking device according to the designed elevation and jacking trajectory, and fix it.

[0017] S4, pilot hole construction;

[0018] Use a micro-jacking drill to drill a pilot hole between the working well and the receiving well through a pilot drill bit;

[0019] S5, retest prediction;

[0020] After the drilling is completed, check whether the axis and elevation of the hole are consistent with the design. If the deviation meets the requirements of the specification, then the hole can be excavated and expanded. Otherwise, the drill rod must be retracted and the hole must be drilled again to correct the deviation.

[0021] S6, back-expanding excavation and jacking of pipelines;

[0022] The corresponding chemical mud is selected according to the soil layer, and the excavation is carried out back and forth. At the same time, the micro-jacking drill cooperates with the jacking device in the receiving well to jack the pipeline while pulling back.

[0023] The preferred technical solution of the present invention is that the guide hole construction in step S4 includes the following steps:

[0024] The first step is to connect the drill pipe to the power clamping device and the clamping frame on the micro-jacking drill rig, and connect the guide drill bit to the front end of the drill pipe; the second step is to use the power clamping device to drive the drill pipe to rotate, thereby driving the guide drill bit to drill from the working well toward the receiver; the third step is to use a handheld guide instrument to track the drilling according to the designed drilling curve, monitor the drilling direction, depth, drill plate status, signal rod temperature at any time, and keep in touch with the driller. It is strictly forbidden to rotate the drill pipe counterclockwise during drilling / pulling back.

[0025] The preferred technical solution of the present invention is that in step S6, a vacuum mud truck should be deployed during construction, and a mud box should be deployed for temporary storage when the environment does not permit.

[0026] The preferred technical solution of the present invention is that in steps S2 and S3, the micro-jacking rig and the pipe jacking device need to be repeatedly measured and calculated using instruments during installation to ensure that the installation errors of the micro-jacking rig and the pipe jacking device are within an allowable range.

[0027] The preferred technical solution of the present invention is that S6 includes the following construction steps:

[0028] The first step is to remove the pilot drill bit and connect the special composite reamer to the front end of the pilot drill rod;

[0029] The second step is to operate the control valves of the power clamping device and the clamping frame of the micro-jacking drill rig to make the power clamping device do a back-dragging (pulling) movement while driving the guide drill rod and the compound reamer to rotate to achieve back-reaming excavation;

[0030] The third step is to hoist the pipe onto the pipe bracket placed on the pipe jacking device, open the pipe jacking device, and slowly push the pipe into the pipe positioning ring of the composite reamer until it fits tightly;

[0031] In the fourth step, the operator in the working well operates the control valves of the power clamping device and the clamping frame, causing the power clamping device to rotate and pull back. The guide drill rod drives the composite reamer to rotate and pull back, realizing back-expansion excavation. At the same time, the operator in the receiving well operates the pipe jacking device to slowly push the pipeline forward.

[0032] Step 5: Repeat steps 3 and 4 until the pipeline laying work is completed;

[0033] Step 6: After the pipeline is laid, the equipment is dismantled and removed from the site.

[0034] The beneficial effects of the present invention are:

[0035] The present invention provides a multifunctional micro-pipe jacking complete set of equipment and construction method. By utilizing a micro-jacking drill and a pipe jacking device, it is possible to perform precisely positioned guide hole construction, thereby ensuring the accuracy of construction. It is also possible to precisely control the jacking and pullback of the pipe to prevent the pipe in the soil layer from being excessively bent or damaged. When the construction method of the present invention is applied to construction in various soil layers, it is possible to effectively improve construction efficiency and project quality, effectively reduce construction costs, and make the construction process smoother. At the same time, the construction method of the present invention can also effectively prevent various problems that arise during the construction process, thereby ensuring construction quality and being beneficial to the safety and environmental friendliness of the construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 Schematic diagram of the equipment status of step S6 in the construction method using the multifunctional micro-pipe jacking equipment provided in a specific embodiment of the present invention;

[0037] Figure 2 It is a structural schematic diagram of a multifunctional micro pipe jacking equipment set provided in a specific embodiment of the present invention;

[0038] Figure 3 It is a structural schematic diagram of a pipe jacking device provided in a specific embodiment of the present invention;

[0039] In the picture:

[0040] 1. Working well; 2. Receiving well; 3. Micro-jacking drill; 4. Pipe jacking device; 5. Pipe jacking machine base; 6. Pipe jacking cylinder; 7. Pressure plate; 8. Pipe bracket; 9. Pipe; 10. Reamer; 11. Power clamping device; 12. Clamping frame; 13. Guide drill rod; 14. Support back plate; 15. Support bottom plate; 16. Stabilizing device; 17. Lifting device; 18. Lifting base; 19. Lifting bracket; 20. Roller; 21. Mounting ring. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0042] As shown in the figure, the present invention provides a multifunctional micro-pipe jacking complete set of equipment, including a micro-jacking drill 3 arranged in a working well 1 and a pipe jacking device 4 arranged in a receiving well 2; the pipe jacking device 4 includes a pipe jacking machine base 5, one end of which is fixedly provided with a pipe jacking cylinder 6, and the output end of the pipe jacking cylinder 6 is provided with a pressure plate 7. The pipe jacking machine base is provided with a pipe bracket 8, and the pipe bracket 8 is provided with a pipe 9. The pipe bracket 8 supports the pipe 9 and keeps the pipe 9 moving in the longitudinal direction to ensure that the pipe 9 does not deviate when the pipe jacking cylinder 6 is pushed forward. The end of the pipe 9 close to the pipe jacking cylinder 6 contacts the pressure plate 7, and the end of the pipe 9 away from the pipe jacking cylinder 6 is connected to the reamer 10;

[0043] The micro-jacking drill rig 3 includes a base, on which is mounted a power clamping device 11 for clamping and rotating a guide drill rod 13. The power clamping device 11 is movably mounted on the base, and a clamping frame 12 is provided on one side of the power clamping device 11. One end of the guide drill rod 13 is fixedly clamped to the power clamping device 11, and the other end of the guide drill rod 13 passes through the clamping frame 12 and is connected to the reamer 10. The power clamping device 11 clamps the guide drill rod 13, and one end of the guide drill rod 13 is connected to the reamer 10. When the reamer 10 is pulled back, the power clamping device 11 drives the guide drill rod 13 to rotate and pull back, thereby driving the reamer 10 to rotate and pull back, achieving excavation. As the reamer 10 is pulled back, the pipe 9 placed on the pipe bracket 8 moves forward along with the reamer 10 under the action of the pipe jacking cylinder 6. When one pipe 9 is fully pushed in, the pipe jacking cylinder 6 retracts, inserting the next pipe 9, and repeating the above steps.

[0044] Among them, the pipe jacking machine base 5 includes a supporting rear plate 14 and a supporting bottom plate 15. The supporting rear plate 14 is vertically arranged at one end of the supporting bottom plate 15. The supporting rear plate 14 is an arc-shaped plate, so that the supporting rear plate 14 fits the inner wall of the receiving well 2. The pipe jacking cylinder 6 is fixedly installed on the supporting rear plate 14. When the pipe jacking cylinder 6 is working, the entire pipe jacking device 4 will not move, ensuring that the pipeline 9 moves along the designed direction.

[0045] Among them, the pipe bracket 8 includes a stabilizing device 16 and a lifting device 17. The stabilizing device 16 is arranged on the supporting base plate 15 and is located on both sides of the pipe 9, and is used to assist in limiting the pipe 9 from being deflected; the lifting device 17 is arranged on the supporting base plate 15 and is located on both sides of the bottom end of the pipe 9, and is used to support and lift the pipe 9.

[0046] Specifically, the lifting device 17 includes several lifting bases 18, which are fixedly mounted on the supporting base plate 15 and distributed on both sides of the bottom end of the pipe 9. A slope is provided on the top of the lifting base 18, and a lifting bracket 19 is mounted on the slope. The lifting bracket 19 is mounted with a roller 20, which fits the outer surface of the pipe 9. The rollers 20 fit on both sides of the bottom end of the pipe 9 to prevent the pipe 9 from deviating from the designed route, and when the pipe 9 moves, the rollers 20 can assist the pipe 9 to move forward.

[0047] A mounting ring 21 is fixedly provided on the side of the pressure plate 7 that contacts the pipe 9. The diameter of the mounting ring 21 is equal to the inner diameter of the pipe 9. One end of the pipe 9 is sleeved on the mounting ring 21 to ensure that the pipe 9 does not deviate from the center of the pressure plate 7 when the pressure plate 7 pushes the pipe 9 forward.

[0048] The present invention provides a construction method using a multifunctional micro-pipe jacking complete set of equipment, comprising the following construction steps:

[0049] S1, alignment measurement;

[0050] A theodolite was set up along the centerline between working shaft 1 and receiving shaft 2 to determine the position of working shaft 1 along the line passing through the centerpoints. A level line was then drawn connecting the two points, and the position of the micro-tube jacking drill rig was determined using a plumb line and a measuring tape. This enabled precise and efficient measurement and layout operations, significantly improving construction efficiency. First, the theodolite's high-precision positioning function allowed engineers to precisely determine the centerline between working shaft 1 and receiving shaft 2. This helped ensure that the subsequent well structure layout remained symmetrical and stable, preventing deformation or tilt. By drawing a level line connecting the two points, engineers could more accurately position the micro-tube jacking drill rig. This ensured the drill rig was always in the optimal working position, reducing the need for equipment adjustment and relocation, significantly improving work efficiency. Using a plumb line and measuring tape to determine the equipment position ensured that the drill rig maintained the correct distance from working shaft 1 during construction, thereby improving construction safety. This also helped reduce wear on the equipment and the wellbore wall, extending its service life and lowering project operating costs.

[0051] In short, by combining tools such as theodolite, level line and plumb line with micro pipe jacking drill equipment, engineers can achieve precise and efficient construction layout and equipment positioning, thereby significantly improving the efficiency and quality of engineering construction.

[0052] S2, micro top drilling rig 3 installation;

[0053] Hoist the multifunctional micro-jacking drill 3 into the working well 1, with its back close to the well wall, install and debug the multifunctional micro-jacking drill 3 according to the designed elevation and drilling trajectory, and fix it;

[0054] S3, installation of pipe jacking device 4;

[0055] Hoist the jacking device 4 into the receiving well 2, with its back close to the well wall, install and debug the jacking device 4 according to the designed elevation and jacking trajectory, and fix it.

[0056] S4, pilot hole construction;

[0057] A pilot hole is drilled between the working well 1 and the receiving well 2 using a micro-jacking drill rig 3 and a pilot drill bit mounted on a pilot drill rod 13;

[0058] The specific steps are as follows: Step 1, connect the drill rod to the power clamping device 11 and the clamping frame 12 on the micro-jacking drill rig 3, and connect the guide drill bit to the front end of the guide drill rod 13; Step 2, the power clamping device 11 drives the guide drill rod 13 to rotate, thereby driving the guide drill bit to drill from the working well 1 toward the receiver; Step 3, use a handheld guide instrument to track the hole according to the designed drilling curve, monitor the drilling direction, depth, drill plate status, signal rod temperature at any time, and keep in touch with the driller. It is strictly forbidden to rotate the drill rod counterclockwise during drilling / pulling back.

[0059] S5, retest prediction;

[0060] After the drilling is completed, check whether the axis and elevation of the hole are consistent with the design. If the deviation meets the requirements of the specification, then the hole can be excavated and expanded. Otherwise, the drill rod must be retracted and the hole must be drilled again to correct the deviation.

[0061] When a new borehole deviates, we can verify the borehole's axis and elevation against the design data to ensure consistency. This prevents further deviation after expansion and ensures smooth subsequent construction. Furthermore, when the borehole deviation meets regulatory requirements, excavation and hole enlargement can begin, improving work efficiency and ensuring project quality. This approach ensures that both drilling and enlarging meet project design requirements before proceeding, reducing unnecessary rework and losses.

[0062] S6, back-expanding excavation and jacking pipeline 9;

[0063] According to the soil layer, the corresponding chemical mud is selected for back-expansion excavation. At the same time, the micro-jacking rig 3 cooperates with the jacking device 4 in the receiving well 2 to jack the pipeline 9 while pulling back. A vacuum mud truck should be equipped during construction, and a mud box should be equipped for temporary storage when the environment does not allow.

[0064] In steps S2 and S3, the micro-jacking rig 3 and the pipe jacking device 4 are repeatedly measured and calculated using instruments during installation to ensure that the installation errors of the micro-jacking rig 3 and the pipe jacking device 4 are within the allowable range. This is a prerequisite for the accuracy of the axis and elevation of the pipeline 9 when laying the pipeline 9.

[0065] Among them, S6 includes the following construction steps:

[0066] The first step is to remove the pilot drill bit and connect the special composite reamer 10 to the front end of the pilot drill rod 13;

[0067] The second step is to operate the control valves of the power clamping device 11 and the clamping frame 12 of the micro-jacking drill 3, so that the power clamping device 11 performs a back-dragging motion while driving the guide drill rod 13 and the composite reamer 10 to rotate, thereby achieving back-reaming excavation;

[0068] The third step is to hoist the pipe 9 onto the pipe bracket 8 placed on the pipe jacking device 4, open the pipe jacking device 4, and slowly push the pipe 9 into the pipe 9 positioning ring of the composite reamer 10 until it fits tightly;

[0069] In the fourth step, the operator in the working well 1 operates the control valves of the power clamping device 11 and the clamping frame 12, causing the power clamping device 11 to rotate and pull back. The guide drill rod 13 drives the composite reamer 10 to rotate and pull back, realizing back-reaming excavation. At the same time, the operator in the receiving well 2 operates the pipe jacking device 4 to slowly push the pipe 9 forward.

[0070] Step 5: Repeat steps 3 and 4 until the pipeline 9 is laid.

[0071] Step 6: After the pipeline 9 is laid, the equipment is dismantled and removed from the site.

[0072] The present invention is described through preferred embodiments. Those skilled in the art will appreciate that various modifications or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. The present invention is not limited to the specific embodiments disclosed herein; other embodiments falling within the scope of the claims of this application are intended to be protected by the present invention.

Claims

1. A multifunctional micro pipe jacking equipment, characterized by: It comprises a micro-jacking drill (3) arranged in a working well (1) and a pipe jacking device (4) arranged in a receiving well (2); The pipe jacking device (4) includes a pipe jacking machine base (5), a pipe jacking cylinder (6) is fixedly provided at one end of the pipe jacking machine base (5), a pressure plate (7) is provided at the output end of the pipe jacking cylinder (6), a pipe bracket (8) is provided on the pipe jacking machine base (5), a pipe (9) is provided on the pipe bracket (8), an end of the pipe (9) close to the pipe jacking cylinder (6) contacts the pressure plate (7), and an end of the pipe (9) away from the pipe jacking cylinder (6) is connected to a reamer (10); The micro-top drilling machine (3) includes a base, and a power clamping device (11) for clamping and rotating a guide drill rod (13) is provided on the base. The power clamping device (11) is movably arranged on the base, and a clamping frame (12) is provided on one side of the power clamping device (11). One end of the guide drill rod (13) is fixedly clamped on the power clamping device (11), and the other end of the guide drill rod (13) penetrates the clamping frame (12) and is connected to the reamer (10); The pipe jacking machine base (5) includes a supporting rear plate (14) and a supporting bottom plate (15), wherein the supporting rear plate (14) is vertically arranged at one end of the supporting bottom plate (15), the supporting rear plate (14) is an arc-shaped plate, and the supporting rear plate (14) is in contact with the inner wall of the receiving well (2), and the pipe jacking cylinder (6) is fixedly mounted on the supporting rear plate (14); The pipe bracket (8) includes a stabilizing device (16) and a lifting device (17), wherein the stabilizing device (16) is arranged on the supporting base plate (15) and is located on both sides of the pipe (9), and the lifting device (17) is arranged on the supporting base plate (15) and is located on both sides of the bottom end of the pipe (9); The lifting device (17) includes a plurality of lifting bases (18), which are fixedly mounted on the supporting base plate (15) and distributed on both sides of the bottom end of the pipe (9). The top of the lifting base (18) is provided with an inclined surface, and a lifting bracket (19) is mounted on the inclined surface. A roller (20) is mounted on the lifting bracket (19), and the roller (20) is in contact with the outer surface of the pipe (9).

2. The multifunctional micro pipe jacking equipment according to claim 1 is characterized in that: A mounting ring (21) is fixedly provided on the surface of the pressure plate (7) that contacts the pipe (9).

3. A construction method using the multifunctional micro-pipe jacking equipment according to any one of claims 1-2, characterized in that: The construction steps include: S1, alignment measurement; The theodolite is set up on the center point line of the working well (1) and the receiving well (2) to determine the position of the working well (1) along the line passing through the center point, a level line is drawn connecting the two points, and the equipment position of the micro-jacking pipe drilling rig is determined using a plumb line and a tape measure; S2, micro-jacking rig (3) installation; The multifunctional micro-jacking drill (3) is hoisted into the working well (1), with its back close to the well wall, and the multifunctional micro-jacking drill (3) is installed, debugged and fixed according to the designed elevation and drilling trajectory; S3, installation of pipe jacking device (4); The pipe jacking device (4) is hoisted into the receiving well (2), with its back close to the well wall, and the pipe jacking device (4) is installed and debugged according to the designed elevation and jacking trajectory and fixed; S4, pilot hole construction; A pilot hole is drilled between the working well (1) and the receiving well (2) using a micro-jacking drill (3) and a pilot drill bit mounted on a pilot drill rod (13); S5, retest prediction; After the drilling is completed, check whether the axis and elevation of the hole are consistent with the design. If the deviation meets the requirements of the specification, then excavation and hole expansion will be carried out. Otherwise, the drill rod must be withdrawn and the drilling must be repeated to correct the deviation. S6, back-expanding excavation and jacking of pipeline (9); The corresponding chemical slurry is selected according to the soil layer, and the excavation is carried out backwards. At the same time, the micro-jacking drill (3) cooperates with the jacking device (4) in the receiving well (2) to jack the pipeline (9) while pulling back.

4. The construction method using the multifunctional micro-pipe jacking equipment according to claim 3 is characterized in that: Step S4: Guide hole construction The following steps are involved: The first step is to connect the guide drill rod (13) with the power clamping device (11) and the clamping frame (12) on the micro-jacking drill (3), and connect the guide drill bit with the front end of the guide drill rod (13); In the second step, the power clamping device (11) drives the guide drill rod (13) to rotate, thereby driving the guide drill bit to drill a hole from the working well (1) toward the receiver; The third step is to use a handheld guide instrument to track the drilling on foot, control the drilling according to the designed drilling curve, monitor the drilling direction, depth, drill plate status, signal rod temperature at any time, and keep in touch with the driller. It is strictly forbidden to rotate the drill rod counterclockwise during drilling / pulling back.

5. The construction method using the multifunctional micro-pipe jacking equipment according to claim 3 is characterized in that: In step S6, a vacuum mud truck should be provided for construction, and a mud box should be provided for temporary storage when the environment does not allow.

6. The construction method using the multifunctional micro-pipe jacking equipment according to claim 3 is characterized in that: In steps S2 and S3, the micro-jacking drill (3) and the pipe jacking device (4) are installed by repeatedly measuring and calculating with instruments to ensure that the installation errors of the micro-jacking drill (3) and the pipe jacking device (4) are within the allowable range.

7. The construction method using the multifunctional micro-pipe jacking equipment according to claim 3 is characterized in that: S6 includes the following construction steps: The first step is to remove the pilot drill bit and connect the special composite reamer (10) to the front end of the pilot drill rod (13); The second step is to operate the control valves of the power clamping device (11) and the clamping frame (12) of the micro-jacking drill (3) to make the power clamping device (11) perform a back-dragging motion while driving the guide drill rod (13) and the composite reamer (10) to rotate, thereby realizing back-reaming excavation; The third step is to hang the pipe (9) on the pipe bracket (8) placed on the pipe jacking device (4), open the pipe jacking device (4), and slowly push the pipe (9) into the pipe (9) positioning ring of the composite reamer (10) until it fits tightly; In the fourth step, the operator in the working well (1) operates the control valves of the power clamping device (11) and the clamping frame (12), causing the power clamping device (11) to rotate and pull back, and the guide drill rod (13) drives the composite reamer (10) to rotate and pull back, thereby realizing back-expansion excavation. At the same time, the operator in the receiving well (2) operates the pipe jacking device (4) to slowly push the pipe (9); Step 5: Repeat steps 3 and 4 until the pipeline (9) is laid. Step 6: After the pipeline (9) is laid, the equipment is dismantled and removed from the site.

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