A trenchless pipe jacking construction device and construction method

Abstract

The application relates to the technical field of pipeline laying devices, and particularly discloses a non-excavation pipe jacking construction device and a construction method, which are installed in a starting well and comprise a back plate, the back plate is arranged on the inner wall of the starting well, a plurality of oil cylinders are arranged on the side of the back plate away from the inner wall of the starting well, a guide rail is arranged on the inner bottom wall of the starting well, a support frame is arranged on the end of the guide rail close to the back plate, the guide rail is arranged perpendicularly to the back plate, a push plate is arranged on the side of the oil cylinder away from the back plate, and a limiting assembly and a driving assembly are arranged on the guide rail; the back plate can improve the supporting effect of the inner wall of the starting well on the oil cylinder, the support frame can support the oil cylinder, after the pipeline is hoisted to the guide rail by hoisting machinery, the push plate at the end of the oil cylinder can push the pipeline, the pipeline is pushed into the soil, when the pipeline retreats, the driving assembly can drive the limiting assembly to timely limit the pipeline, so that the displacement of the pipeline retreat is reduced.

Description

Technical Field

[0001] This application relates to the field of pipeline laying equipment technology, and in particular to a trenchless pipe jacking construction device and construction method. Background Technology

[0002] In the construction of pipelines for water supply, electricity, telecommunications, natural gas, coal gas, oil, etc., which are laid into the ground, pipe jacking is often used to install the pipes. When the pipes encounter hard soil, the construction workers often use pipe jacking devices to push the pipes into the ground in order to avoid excavating the soil.

[0003] Pipe jacking is a device used to lay various underground utilities without excavating the ground surface. Most pipe jacking devices currently include a backplate, on which hydraulic cylinders are mounted. Push plates are mounted on the hydraulic cylinders, and rails are installed below the hydraulic cylinders. After the pipe is placed on the rails, the drive hydraulic cylinder is activated, which in turn drives the pusher cylinder to push the pusher plate. The pusher plate then pushes the pipe along the rails, thus driving the pipe into relatively hard soil.

[0004] Regarding the aforementioned technologies, after the hydraulic cylinder pushes the pipe into the soil, when the push plate at the end of the hydraulic cylinder separates from the pipe, the pipe is often subjected to deformation and compression by the soil, causing it to retract backward. Therefore, improvements are needed to address this issue. Summary of the Invention

[0005] To reduce the amount of backward displacement of the pipeline, this application provides a trenchless pipe jacking construction device and construction method.

[0006] This application provides a trenchless pipe jacking construction device and method, which adopts the following technical solution: A trenchless pipe jacking construction device, installed inside a launching shaft, includes a back plate disposed on the inner wall of the launching shaft. Multiple hydraulic cylinders are disposed on the side of the back plate away from the inner wall of the launching shaft. A guide rail is disposed on the inner bottom wall of the launching shaft, perpendicular to the back plate. A support frame for supporting the hydraulic cylinders is disposed on the end of the guide rail near the back plate. A push plate for jacking the pipe is disposed on the side of the hydraulic cylinder away from the back plate. A limiting component for preventing pipe retraction is disposed on the guide rail, and a driving component for driving the limiting component to restrict the pipe.

[0007] By adopting the above technical solution, the back plate can transmit the reaction force received by the hydraulic cylinder to the inner wall of the launching well, thereby improving the support effect of the inner wall of the launching well on the hydraulic cylinder. The support frame can support the hydraulic cylinder and prevent relative movement between the hydraulic cylinder and the back plate after long-term use, thus reducing the jacking effect on the pipeline. After the pipeline is hoisted onto the guide rail by hoisting machinery, the push plate at the end of the hydraulic cylinder can push the pipeline and jack the pipeline into the soil. When the pipeline moves backward, the drive component can drive the limiting component to restrict the pipeline in time, thereby reducing the amount of backward displacement of the pipeline.

[0008] Optionally, the guide rail includes a first crossbeam and a second crossbeam, and the limiting component includes a clamping plate, a rotating rod, and a rotating roller. The rotating rod is disposed between the first crossbeam and the second crossbeam, and both ends of the rotating rod pass through the first crossbeam and the second crossbeam respectively. The rotating roller is sleeved on the rotating rod and is disposed between the first crossbeam and the second crossbeam. Both ends of the rotating rod are threaded. Two sets of clamping plates are provided, and the two sets of clamping plates are threaded to both ends of the rotating rod respectively. The clamping plates are provided with a limiting structure for limiting the clamping plates. When the pipe retracts, the driving component can drive the rotating rod to rotate.

[0009] By adopting the above technical solution, when the pipeline retracts, the drive assembly drives the rotating rod to rotate. Since the end of the rotating rod is threaded and the threads at the end of the clamping plate and the rotating plate are threadedly connected, the clamping plate can move closer to the pipeline to clamp the pipeline under the action of the limiting assembly, thereby restricting the retraction of the pipeline and reducing the displacement of the pipeline.

[0010] Optionally, the limiting structure includes two limiting blocks. Both the first crossbeam and the second crossbeam have limiting grooves. The two limiting blocks are slidably disposed in the limiting grooves. The two limiting blocks are respectively disposed on the two clamping plates. The clamping plates are threadedly connected to the rotating rod through the limiting blocks.

[0011] By adopting the above technical solution, when the rotating rod rotates, the threaded connection between the rotating rod and the limiting block can drive the limiting block to move in the limiting groove. The limiting block and the limiting groove can restrict the movement direction of the clamping plate, so that the clamping plate can only move towards the pipeline, thereby clamping the pipeline.

[0012] Optionally, a friction layer is attached to the clamping plate to increase the friction between the clamping plate and the pipe, and the friction layer is provided with a plurality of friction protrusions.

[0013] By adopting the above technical solution, the friction layer can improve the friction effect between the clamping plate and the pipe, thereby improving the clamping and restricting effect of the clamping plate on the pipe. The friction protrusions can further improve the friction effect between the clamping plate and the pipe, thereby further improving the clamping and restricting effect of the clamping plate on the pipe.

[0014] Optionally, the drive assembly includes a ratchet and a pawl, both of which are disposed inside the rotating roller. The ratchet is coaxially disposed on the rotating rod, and the pawl is disposed on the inner wall of the rotating roller. When the rotating rod drives the clamping plate closer to the pipe, the ratchet and the pawl engage.

[0015] By adopting the above technical solution, when the pipe retracts, the rotating roller rotates counterclockwise under the friction between the pipe and the rotating roller. At this time, the ratchet and pawl mesh, thereby driving the rotating rod to rotate counterclockwise, thus realizing the rotation drive of the rotating rod.

[0016] Optionally, a bearing is provided between the rotating rod and the rotating roller to facilitate relative rotation between the rotating rod and the rotating roller.

[0017] By adopting the above technical solution, the bearing can reduce the friction between the rotating rod and the rotating roller, which facilitates the pushing of the pipe on the rotating roller. At the same time, it can also prevent the rotating roller from driving the rotating rod to rotate when the rotating roller rotates clockwise, thereby affecting the initial position of the clamping plate.

[0018] Optionally, the first crossbeam and the second crossbeam are provided with mounting grooves at intervals on the sidewalls in contact with the pipe. The mounting grooves are provided with protrusions and reset members. The protrusions can extend out of the mounting grooves under the action of the reset members. The angle between the side of the protrusion extending out of the mounting groove and the sidewall of the first crossbeam and the second crossbeam is an obtuse angle.

[0019] By adopting the above technical solution, when the pipeline moves on the guide rail, the pipeline abuts against the end of the protrusion extending out of the mounting groove. Since the angle between the end of the protrusion extending out of the mounting groove and the side of the back plate and the side wall of the first crossbeam is an obtuse angle, the pipeline can push the protrusion into the mounting groove. After the pipeline has completely passed the protrusion, the protrusion extends out of the mounting groove under the action of the reset member. If the pipeline retracts and the clamping plate fails to effectively clamp and restrict the pipeline, the protrusion can block the pipeline, thereby improving the safety of the device.

[0020] Optionally, the bump is provided with a buffer layer to reduce the pressure of the bump colliding with the pipe.

[0021] By adopting the above technical solution, the buffer layer can reduce the collision pressure when the pipe comes into contact with the protrusion, thereby reducing damage to the pipe.

[0022] Optionally, the push plate is provided with a rotating groove, in which a threaded rod is rotatably disposed. The push plate is also provided with a moving groove, which is connected to the rotating groove. A moving block is disposed in the moving groove, and the moving block is threadedly connected to the threaded rod. A support rod for supporting the inner wall of the pipe is disposed on the moving block.

[0023] By adopting the above technical solution, rotating the threaded rod allows the moving block to move within the moving groove due to the threaded connection between the threaded rod and the moving block. This adjusts the position of the support rod on the moving rod, enabling the support rod to support the inner wall of the pipe and improve the stability of the pipe.

[0024] This application also includes a trenchless pipe jacking construction method, comprising the following steps: S1: The pipe is hoisted and placed on the first and second crossbeams of the guide rail using a hoisting mechanism; S2: Activate the hydraulic cylinder, and the push plate at the end of the hydraulic cylinder abuts against the end of the pipe, pushing the pipe to move along the length direction of the guide rail; S3: The telescopic end of the cylinder continues to push the pipe to move, so that the end of the pipe away from the push plate abuts against the end of the pipe that has already been pushed into the soil, until the pipe on the guide rail is also pushed into the soil.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. When the pipe retracts, the drive assembly drives the rotating rod to rotate. Since the end of the rotating rod is threaded and the clamping plate is threadedly connected to the end of the rotating plate, the clamping plate can move closer to the pipe to clamp the pipe under the action of the limiting assembly, thereby limiting the retraction of the pipe and reducing the displacement of the pipe. 2. When the pipe moves on the guide rail, the pipe abuts against the end of the protrusion that extends out of the mounting groove. Since the angle between the end of the protrusion that extends out of the mounting groove and the side of the back plate and the side wall of the first crossbeam is an obtuse angle, the pipe can push the protrusion into the mounting groove. After the pipe has completely passed the protrusion, the protrusion extends out of the mounting groove under the action of the reset component. If the pipe moves backward and the clamping plate fails to effectively clamp and restrict the pipe, the protrusion can block the pipe, thereby improving the safety of the device. 3. Rotate the threaded rod. Since the threaded rod is connected to the moving block by a thread, the moving block can move within the moving groove, thereby adjusting the position of the support rod on the moving rod. This allows the support rod to support the inner wall of the pipe and improve the stability of the pipe. 4. Bearings can reduce the friction between the rotating rod and the rotating roller, making it easier to push the pipe on the rotating roller. At the same time, when the rotating roller rotates clockwise, it can also prevent the rotating roller from driving the rotating rod to rotate, thus affecting the initial position of the clamping plate. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application; Figure 2 yes Figure 1 A cross-sectional schematic diagram of part of the structure; Figure 3 yes Figure 2 Enlarged schematic diagram of part A; Figure 4 yes Figure 1 A cross-sectional schematic diagram of part of the structure.

[0028] Reference numerals: 1. Back plate; 2. Hydraulic cylinder; 21. Push plate; 3. Guide rail; 31. Support frame; 32. First crossbeam; 33. Second crossbeam; 4. Restriction assembly; 41. Clamping plate; 411. Friction layer; 412. Friction protrusion; 42. Rotating rod; 43. Rotating roller; 5. Drive assembly; 51. Ratchet; 52. Pawl; 53. Bearing; 6. Limiting structure; 61. Limiting block; 62. Stabilizing rod; 7. Mounting groove; 71. Protrusion; 711. Buffer layer; 8. Rotating groove; 81. Threaded rod; 82. Moving groove; 83. Moving block; 84. Support rod. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0030] This application discloses a trenchless pipe jacking construction device.

[0031] A trenchless pipe jacking construction device, referring to Figure 1 , Figure 2 and Figure 3Installed inside the launching well, it includes a back plate 1, which is a steel plate. Anchor bolts are installed on the back plate 1, and the back plate 1 is fixedly installed on the inner wall of the launching well by the anchor bolts. Four hydraulic cylinders 2 are fixedly installed on the side of the back plate 1 away from the inner wall of the launching well. Four is a preferred embodiment. In other embodiments, the number of hydraulic cylinders 2 can be adjusted according to actual needs. A guide rail 3 is installed on the inner bottom wall of the launching well. A support frame 31 is welded and installed on the end of the guide rail 3 near the back plate 1. The guide rail 3 is installed perpendicular to the back plate 1. A push plate 21 is provided on the side of the hydraulic cylinder 2 away from the back plate 1. A limiting component 4 and a driving component 5 are provided on the guide rail 3.

[0032] The back plate 1 can transmit the reaction force received by the hydraulic cylinder 2 to the inner wall of the launching well, thereby improving the support effect of the inner wall of the launching well on the hydraulic cylinder 2. The support frame 31 can support the hydraulic cylinder 2, preventing relative movement between the hydraulic cylinder 2 and the back plate 1 after prolonged use, thus reducing the jacking effect on the pipeline. After the pipeline is hoisted onto the guide rail 3 by hoisting machinery, the push plate 21 at the end of the hydraulic cylinder 2 can push the pipeline and jack it into the soil. When the pipeline moves backward, the drive component 5 can drive the limiting component 4 to restrict the pipeline in time, thereby reducing the amount of backward displacement of the pipeline.

[0033] To achieve clamping and restraint of the pipe, refer to Figure 1 , Figure 2 and Figure 3 In this embodiment, the guide rail 3 includes a first crossbeam 32 and a second crossbeam 33. The limiting component 4 includes a clamping plate 41, a rotating rod 42, and a rotating roller 43. The rotating rod 42 is rotatably installed between the first crossbeam 32 and the second crossbeam 33, and both ends of the rotating rod 42 are respectively installed through the first crossbeam 32 and the second crossbeam 33. The rotating roller 43 is sleeved on the rotating rod 42 and is installed between the first crossbeam 32 and the second crossbeam 33. Both ends of the rotating rod 42 are threaded. Two sets of clamping plates 41 are installed, and the two sets of clamping plates 41 are respectively threaded to both ends of the rotating rod 42. The clamping plate 41 is provided with a limit structure 6. When the pipe retracts, the driving component 5 can drive the rotating rod 42 to rotate.

[0034] When the pipe retracts, the drive assembly 5 drives the rotating rod 42 to rotate. Since the end of the rotating rod 42 is threaded and the clamping plate 41 is threadedly connected to the thread at the end of the rotating plate, the clamping plate 41 can move closer to the pipe and clamp the pipe under the action of the limiting assembly, thereby limiting the retraction of the pipe and reducing the displacement of the pipe. In this embodiment, the limiting assembly 4 is provided in two sets. Two sets are a preferred embodiment. In other embodiments, the number of limiting assemblies 4 can be adjusted according to actual needs.

[0035] In this embodiment, the clamping plate 41 needs to move closer to the pipe to clamp it, as shown in the reference. Figure 3 Therefore, the limiting structure 6 in this embodiment includes two limiting blocks 61. Limiting grooves are provided on the first crossbeam 32 and the second crossbeam 33. The two limiting blocks 61 are slidably installed in the limiting grooves. The two limiting blocks 61 are welded to the two clamping plates 41. The limiting blocks 61 are threadedly connected to the rotating rod 42. A stabilizing rod 62 is also movably installed on the limiting block 61. The stabilizing rod 62 is fixedly installed in the limiting groove along the width direction of the guide rail 3. In this embodiment, the limiting structure 6 and the limiting component 4 are provided in two sets.

[0036] When the rotating rod 42 rotates, the threaded connection between the rotating rod 42 and the limiting block 61 causes the limiting block 61 to move in the limiting groove. The limiting block 61 and the limiting groove can restrict the movement direction of the clamping plate 41, so that the clamping plate 41 can only move towards the pipeline, thereby clamping the pipeline. The stabilizing rod 62 can improve the stability of the limiting block 61 when it moves, thereby allowing the clamping plate 41 to better clamp the pipeline.

[0037] To enable the clamping plate 41 to better clamp the pipe, a friction layer 411 is attached to the surface of the clamping plate 41 that contacts the pipe in this embodiment. The friction layer 411 can improve the friction effect between the clamping plate 41 and the pipe, thereby improving the clamping and restricting effect of the clamping plate 41 on the pipe. (Refer to...) Figure 3 In this embodiment, a plurality of friction protrusions 412 are integrally formed on the friction layer 411. The friction protrusions 412 can further improve the friction effect between the clamping plate 41 and the pipe, thereby further improving the clamping and restricting effect of the clamping plate 41 on the pipe. In this embodiment, the friction layer 411 is a rubber layer, which is a preferred embodiment. In other embodiments, the friction layer 411 can be a soft plastic layer.

[0038] Only when the rotating rod 42 rotates can it drive the clamping plate 41 to move closer and clamp towards the pipe, as shown in the reference. Figure 3 Therefore, the drive assembly 5 in this embodiment includes a ratchet 51 and a pawl 52. Both the ratchet 51 and the pawl 52 are installed inside the rotating roller 43. The ratchet 51 is coaxially welded to the rotating rod 42, and the pawl 52 is rotatably installed on the inner wall of the rotating roller 43. When the rotating rod 42 drives the clamping plate 41 to move towards the pipe, the ratchet 51 and the pawl 52 mesh with each other. When the pipe moves backward, the rotating roller 43 rotates under the friction between the pipe and the rotating roller 43. At this time, the ratchet 51 on the rotating rod 42 and the pawl 52 on the inner wall of the rotating roller 43 mesh with each other, thereby driving the rotating rod 42 and the ratchet to rotate synchronously, thus realizing the rotation drive of the rotating rod.

[0039] If the friction between the rotating rod 42 and the rotating roller 43 is large, the rotating roller 43 may also drive the rotating rod 42 to rotate as the pipe advances, thus affecting the initial position of the clamping plate 41. This would cause the clamping plate 41 to fail to clamp the retracting pipe in time. (Refer to...) Figure 3 Therefore, in this embodiment, a bearing 53 is installed between the rotating rod 42 and the rotating roller 43. The side wall of the rotating rod 42 is welded to the inner wall of the bearing 53, and the outer wall of the bearing 53 is welded to the inner wall of the rotating roller 43. Compared with directly pushing the pipe, the bearing 53 can also convert the static friction force received by the pipe during the jacking process into static friction force, thereby reducing the load on the cylinder 2. In this embodiment, two sets of drive components 5 are provided between a single rotating rod 42 and a single rotating roller 43. The two sets of drive components 5 are a preferred embodiment. In other embodiments, the number of drive components 5 can be increased or decreased according to actual needs.

[0040] During pipeline construction, operator errors can inevitably lead to significant pipeline retraction, potentially posing a safety hazard to workers. (Refer to...) Figure 3 Therefore, in this embodiment, mounting grooves 7 are provided at intervals on the side walls of the first crossbeam 32 and the second crossbeam 33 that contact the pipe. A protrusion 71 and a reset member are installed in the mounting groove 7, and the reset member is installed below the protrusion 71. The protrusion 71 can extend out of the mounting groove 7 under the action of the reset member. The angle between the side of the protrusion 71 extending out of the mounting groove 7 and the side wall of the first crossbeam 32 and the second crossbeam 33 is an obtuse angle. When the pipe moves on the guide rail 3, the pipe abuts against the end of the protrusion 71 extending out of the mounting groove 7. Since the angle between the end of the protrusion 71 extending out of the mounting groove 7 and the side wall of the first crossbeam 32 is an obtuse angle, the pipe can push the protrusion 71 into the mounting groove 7. After the pipe has completely passed the protrusion 71, the protrusion 71 extends out of the mounting groove 7 under the action of the reset member. If the pipe moves backward and the clamping plate 41 fails to effectively clamp and restrict the pipe, the protrusion 71 can block the pipe, thereby improving the safety of the device.

[0041] Reference Figure 3 In this embodiment, the reset element is a spring, which is a preferred embodiment. In other embodiments, the reset element may be an elastic pad or the like. When the protrusion 71 collides with the pipe, it may damage the pipe. Therefore, in this embodiment, a buffer layer 711 is also attached to the protrusion 71. The buffer layer 711 is attached to the side of the protrusion 71 away from the back side. In this embodiment, the buffer layer 711 is a rubber layer, which is a preferred embodiment. In other embodiments, the buffer layer 711 may be a soft plastic layer or the like.

[0042] During pipe jacking, pipe swaying is inevitable. To reduce swaying and improve the accuracy of pipe jacking, refer to... Figure 1 , Figure 4 In this embodiment, a rotating groove 8 is provided on the push plate 21, and a threaded rod 81 is rotatably installed in the rotating groove 8. A moving groove 82 is also provided on the push plate 21, and the moving groove 82 is connected to the rotating groove 8. A moving block 83 is installed in the moving groove 82, and the moving block 83 is threadedly connected to the threaded rod 81. A support rod 84 is welded and installed on the side of the moving block 83 away from the back plate 1. By rotating the threaded rod 81, since the threaded rod 81 is threadedly connected to the moving block 83, the moving block 83 can move in the moving groove 82, thereby adjusting the position of the support rod 84 on the moving rod. This allows the support rod 84 to support the inner wall of the pipe, improving the stability of the pipe. In this embodiment, there are three rotating grooves 8, which means there are also three support rods 84 supporting the inner wall of the pipe. Three is a preferred embodiment, and in other embodiments, it can be adjusted according to actual needs.

[0043] The implementation principle of a trenchless pipe jacking construction device according to an embodiment of this application is as follows: When it is necessary to push the pipeline forward, hoisting machinery is used to hoist the pipeline and place it on the guide rail 3. The hydraulic cylinder 2 is activated, and the hydraulic cylinder 2 pushes the push plate 21 to abut against the pipeline, thereby pushing the pipeline forward through the push plate 21.

[0044] When the pipe retracts, the pipe drives the rotating roller 43 to rotate counterclockwise. When the rotating roller 43 rotates counterclockwise, it drives the ratchet 51 on the inner wall of the rotating roller 43 to mesh with the ratchet 51 on the rotating rod 42, so that the rotating rod 42 rotates counterclockwise synchronously. Since the two ends of the rotating rod 42 are threadedly connected to the clamping plate 41, the clamping plate 41 can be driven to move closer to the pipe, thereby clamping the pipe.

[0045] Reference Figure 1-4 This application also discloses a trenchless pipe jacking construction method, including the following steps.

[0046] S1: The pipe is hoisted and placed on the first crossbeam 32 and the second crossbeam 33 of the guide rail 3 using a hoisting mechanism; S2: Start the hydraulic cylinder 2, and the push plate 21 at the end of the hydraulic cylinder 2 abuts against the end of the pipe, pushing the pipe to move along the length direction of the guide rail 3; S3: The telescopic end of the hydraulic cylinder 2 continues to push the pipe to move, so that the end of the pipe away from the push plate 21 abuts against the end of the pipe that has already been pushed into the soil, until the pipe on the guide rail 3 is also pushed into the soil.

[0047] Unless otherwise defined, the technical or scientific terms used in this application shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," "third," and similar terms used in this application specification and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar terms mean that the elements or objects preceding "comprising" or "including" encompass the elements or objects listed following "comprising" or "including" and their equivalents, and do not exclude other elements or objects. "Above," "below," "left," "right," etc., are used only to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0048] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A trenchless pipe jacking construction device, installed in a launching shaft, comprising a back plate (1), the back plate (1) being disposed on the inner wall of the launching shaft, characterized in that: Multiple hydraulic cylinders (2) are provided on the side of the back plate (1) away from the inner wall of the launching well. A guide rail (3) is provided on the inner bottom wall of the launching well. The guide rail (3) is perpendicular to the back plate (1). A support frame (31) for supporting the hydraulic cylinder (2) is provided on the end of the guide rail (3) near the back plate (1). A push plate (21) for jacking the pipeline is provided on the side of the hydraulic cylinder (2) away from the back plate (1). A limiting component (4) for preventing the pipeline from retracting is provided on the guide rail (3), and a mechanism for driving the limiting component (4) to support the hydraulic cylinder (2) is provided. The guide rail (3) includes a first crossbeam (32) and a second crossbeam (33). The limiting component (4) includes a clamping plate (41), a rotating rod (42), and a rotating roller (43). The rotating rod (42) is disposed between the first crossbeam (32) and the second crossbeam (33), and both ends of the rotating rod (42) pass through the first crossbeam (32) and the second crossbeam (33) respectively. The rotating roller (43) is sleeved on the rotating rod (42), and the rotating roller (43) is disposed between the first crossbeam (32) and the second crossbeam (33). Between the two crossbeams (33), both ends of the rotating rod (42) are threaded. Two sets of clamping plates (41) are provided, and the two sets of clamping plates (41) are threaded to both ends of the rotating rod (42). The clamping plates (41) are provided with limiting structures (6) for limiting the clamping plates (41). The driving assembly (5) includes a ratchet (51) and a pawl (52). The ratchet (51) and the pawl (52) are both provided inside the rotating roller (43), and the ratchet (51) is coaxially provided on the rotating rod (42). The pawl (52) is provided with... On the inner wall of the rotating roller (43); when the pipe retracts, the rotating roller (43) rotates under the friction between the pipe and the rotating roller (43), the ratchet (51) on the rotating rod (42) and the pawl (52) on the inner wall of the rotating roller (43) mesh, thereby driving the rotating rod (42) and the ratchet (51) to rotate synchronously; the two ends of the rotating rod (42) are respectively threaded to the clamping plate (41) to drive the clamping plate (41) to move closer to the pipe, so as to clamp the pipe.

2. The trenchless pipe jacking construction device according to claim 1, characterized in that: The limiting structure (6) includes two limiting blocks (61). Limiting grooves are provided on the first crossbeam (32) and the second crossbeam (33). The two limiting blocks (61) are slidably disposed in the limiting grooves. The two limiting blocks (61) are respectively disposed on the two clamping plates (41). The clamping plates (41) are threadedly connected to the rotating rod (42) through the limiting blocks (61).

3. The trenchless pipe jacking construction device according to claim 1, characterized in that: A friction layer (411) is attached to the clamping plate (41) to improve the friction between the clamping plate (41) and the pipe, and a plurality of friction protrusions (412) are provided on the friction layer (411).

4. The trenchless pipe jacking construction device according to claim 1, characterized in that: A bearing (53) is provided between the rotating rod (42) and the rotating roller (43) to facilitate relative rotation between the rotating rod (42) and the rotating roller (43).

5. The trenchless pipe jacking construction device according to claim 1, characterized in that: The first crossbeam (32) and the second crossbeam (33) are provided with mounting grooves (7) spaced apart on the sidewalls that contact the pipe. The mounting grooves (7) are provided with protrusions (71) and reset members. The protrusions (71) can extend out of the mounting grooves (7) under the action of the reset members. The angle between the side of the protrusion (71) extending out of the mounting grooves (7) near the back plate (1) and the sidewalls of the first crossbeam (32) and the second crossbeam (33) is an obtuse angle.

6. The trenchless pipe jacking construction device according to claim 5, characterized in that: The bump (71) is provided with a buffer layer (711) for reducing the collision pressure between the bump (71) and the pipe.

7. The trenchless pipe jacking construction device according to claim 1, characterized in that: The push plate (21) is provided with a rotating groove (8), and a threaded rod (81) is rotatably arranged in the rotating groove (8). The push plate (21) is also provided with a moving groove (82), which is connected to the rotating groove (8). A moving block (83) is provided in the moving groove (82), and the moving block (83) is threadedly connected to the threaded rod (81). A support rod (84) for supporting the inner wall of the pipe is provided on the moving block (83).

8. A trenchless pipe jacking construction method, based on a trenchless pipe jacking construction device according to any one of claims 2 to 7, characterized in that: Includes the following steps: S1: The pipe is hoisted and placed on the first crossbeam (32) and the second crossbeam (33) of the guide rail (3) using a hoisting mechanism; S2: Start the oil cylinder (2), the push plate (21) at the end of the oil cylinder (2) abuts against the end of the pipe, and pushes the pipe to move along the length direction of the guide rail (3); S3: The telescopic end of the cylinder (2) continues to push the pipe to move until the pipe on the guide rail (3) is pushed into the soil.

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