Pipe jacking construction vertical limiting device

Abstract

The utility model provides a kind of vertical limiting device for pipe jacking construction, including pipe body, vertical limiting device includes the door type frame of being erected in the pipe body outside, and the pullout resistance component of being anchored in ground is provided on door type frame, and the side of door type frame close to pipe body jacking direction is provided with inclined bracing frame, and the inner top wall of door type frame is provided with the sliding limiting component that is in contact with the top of pipe body activity resistance.The door type frame is set outside the pipe body, and the pullout resistance component anchored to the ground, lateral inclined bracing frame and top sliding limiting component are combined, to form a multidirectional collaborative restraint system, effectively solve the problems of machine head sinking and pipe body tail lifting caused by the heavy weight of machine head and weak stratum during the initial stage of pipe jacking.

Description

Technical Field

[0001] This utility model relates to the field of steel pipe jacking construction, and in particular to a vertical limiting device for pipe jacking construction. Background Technology

[0002] In current urban underground pipeline construction and integrated utility tunnel laying projects, traditional open-cut construction methods are prone to causing a series of problems such as traffic disruption, road surface damage, and disturbance to existing underground pipelines, making it difficult to meet the requirements of minimizing construction disturbance and refining operation and maintenance in high-density built-up areas. Against this backdrop, trenchless pipe jacking technology has become the core construction method for urban underground space development due to its advantages such as minimal impact on the surface environment, high construction efficiency, and good safety.

[0003] The initial stage of pipe jacking construction is a critical control link in the entire project, directly affecting the trajectory accuracy and construction safety of subsequent advancement. This stage requires accurately guiding the pipe jacking machine from the starting shaft to the pre-set underground axis. However, under adverse geological conditions such as soft soil and water-rich soil, the tunnel face is highly susceptible to instability and collapse, causing the pipe jacking machine head to sink. Simultaneously, due to low stratum bearing capacity and weak lateral restraint, the machine head's autonomous correction ability is significantly limited, easily leading to trajectory deviation. Once deviation occurs, it may not only damage the tunnel portal sealing device (such as water-stop rubber), causing mud and water leakage, but also affect the jacking accuracy, delay the construction period, and in severe cases, even lead to starting failure, jeopardizing the safety and success of the entire project. Therefore, a vertical limiting device for pipe jacking construction is proposed to solve the above problems. Utility Model Content

[0004] The main purpose of this utility model is to provide a vertical limiting device for pipe jacking construction, so as to solve the problems of pipe jacking head sinking, trajectory deviation and tunnel portal sealing failure caused by the self-weight of the jacking head and insufficient soil bearing capacity in the initial stage of existing pipe jacking.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a vertical limiting device for pipe jacking construction, including a pipe body, the vertical limiting device including a portal frame erected outside the pipe body, an anti-pull-out component anchored in the ground on the portal frame, a diagonal brace on the side of the portal frame near the pipe body jacking direction, and a sliding limiting component that moves against the top of the pipe body on the inner top wall of the portal frame.

[0006] In the preferred embodiment, the portal frame includes two uprights and a crossbeam disposed on top of the two uprights, with a gap provided on the crossbeam for the pull-out assemblies to pass through.

[0007] In the preferred embodiment, the pull-out resistant component includes an embedded part pre-embedded in the ground and an anchor rod connected to the embedded part, with the top of the anchor rod passing through the gap and equipped with a fastener.

[0008] In the preferred embodiment, the embedded part includes an embedded plate, on which an embedded rod is welded, and the top end of the embedded rod protrudes from the ground and is connected to the anchor rod through a connecting sleeve; The fasteners include a pad with a size larger than the clearance, on which a threaded fastening nut is tightened.

[0009] In the preferred embodiment, there are two pull-out resistant components, which are symmetrically arranged at both ends of the crossbeam.

[0010] In the preferred embodiment, the diagonal bracing includes diagonal bracing rods installed on the side of the upright, and a reinforcing rod is installed between the middle of the diagonal bracing rod and the bottom of the upright.

[0011] In the preferred embodiment, a support plate is welded to the top of the support frame. The support plate is located on the side of the crossbeam closest to the jacking direction of the tube body and is used to limit the crossbeam in the jacking direction.

[0012] In a preferred embodiment, the sliding limit assembly includes a limit roller, which is fixed to the bottom of the crossbeam by welding.

[0013] In the preferred embodiment, the crossbeam comprises two vertically arranged I-beams; The sliding limit assembly includes a lifting adjustment structure and a limit roller. The lifting adjustment structure includes an adjustment seat, which is adapted to the shape of the cavity formed between two I-beams and is installed therein. The adjustment seat is provided with two guide holes and one rotating hole. An internal threaded sleeve is rotatably provided in the rotating hole. The top of the limit roller is provided with two guide rods and a lead screw passing through the gap. The two guide rods respectively move through the guide rods of the corresponding guide holes. The lead screw thread passes through the internal threaded sleeve. The top of the internal threaded sleeve protrudes from the gap and is provided with a rotation control part for controlling the rotation of the internal threaded sleeve.

[0014] In the preferred embodiment, the rotation control unit is a driven gear, and a drive mechanism for driving the driven gear to rotate is provided on the crossbeam. The drive mechanism includes a drive device and a transmission gear disposed thereon that meshes with the rotation control unit.

[0015] This invention provides a vertical limiting device for pipe jacking construction. By setting a portal frame on the outside of the pipe body, combined with an anti-pull-out component anchored to the ground, a lateral bracing frame, and a top sliding limiting component, a multi-directional collaborative constraint system is formed. This effectively solves the problems of pipe head sinking and pipe tail tilting caused by the heavy weight of the jacking head and weak strata during the initial stage of pipe jacking. Among them, the anti-pull-out component provides a reliable vertical reaction force foundation to prevent the portal frame from floating as a whole; the bracing frame enhances the lateral stability of the structure and suppresses deflection and overturning; the sliding limiting component ensures the stability of the jacking head posture through limiting force while allowing the pipe body to advance normally. The device has a simple structure and is easy to install. It has both vertical limiting and horizontal drag reduction functions, significantly improving the accuracy of pipe jacking and construction safety, effectively protecting the tunnel portal sealing system, and avoiding leakage or engineering accidents caused by trajectory deviation. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is an overall structural diagram of the present invention; Figure 2 This is a structural diagram of the limiting device of this utility model; Figure 3 This is an exploded structural diagram of the crossbeam, the anti-pull-out component, and the sliding limiting component of this utility model; Figure 4 This is a utility model Figure 3 Enlarged view of the A-structure; Figure 5 This is a utility model Figure 2 Side view structural diagram; Figure 6 This is a utility model Figure 2 A front view of the structure; Figure 7 This is a partially exploded cross-sectional view of the lifting and adjusting structure of this utility model.

[0017] In the diagram: 1. Portal frame; 10. Upright; 11. Horizontal beam; 110. I-beam; 111. Support plate; 112. Gap; 2. Diagonal brace; 20. Diagonal brace rod; 21. Reinforcing rod; 3. Sliding limit assembly; 310. Adjusting seat; 311. Guide hole; 312. Rotating hole; 313. Internal threaded sleeve; 314. Rotation control unit; 315. Guide rod; 316. Lead screw; 317. Limiting roller; 32. Drive mechanism; 320. Drive device; 321. Transmission gear; 4. Pull-out component; 40. Embedded part; 401. Embedded plate; 402. Embedded rod; 403. Connecting sleeve; 41. Anchor bolt; 42. Fastener; 420. Pad; 421. Jacking nut; 5. Pipe rail; 6. Pipe body. Detailed Implementation

[0018] like Figure 1-7As shown, a vertical limiting device for pipe jacking construction includes a pipe jacking rail 5, a pipe body 6 placed on the pipe jacking rail 5, and a vertical limiting device erected outside the pipe jacking rail 5 and the pipe body 6. The vertical limiting device includes a portal frame 1 and a sliding limiting component 3 set on the inner top wall of the portal frame 1. The sliding limiting component 3 moves in contact with the top of the pipe body 6. An anti-pull-out component 4 anchored in the ground is also provided on the portal frame. A diagonal brace 2 is provided on the side of the portal frame 1 near the jacking direction of the pipe body 6.

[0019] With this design, the upper part of the tube 6 can be limited by the gantry frame 1 during the jacking process, thereby preventing it from tilting due to the top-heavy working condition. During this process, the sliding limit component 3 can reduce the friction caused by the pressure on the steel pipe by resisting the movement of the tube 6, thus avoiding affecting the normal jacking of the tube 6. In addition, the diagonal brace 2 and the anti-pull-out component 4 can effectively enhance its overall stability and anti-pull-out ability, thereby achieving the above-mentioned limiting effect.

[0020] Furthermore, the portal frame 1 includes two uprights 10 and a crossbeam 11 set on the top of the two uprights 10. There are two diagonal braces 2, which are welded to the side of the uprights 10 near the tube body 6 in the pushing direction. The diagonal braces 2 include diagonal bracing rods 20, and a reinforcing rod 21 is welded between the middle of the diagonal bracing rods 20 and the bottom of the uprights 10.

[0021] In a preferred embodiment, the crossbeam 11 is provided with a gap 112 for the pull-out resisting component 4 to pass through. In this embodiment, the crossbeam 11 specifically includes two vertically arranged I-beams 110, with a gap 112 formed between the two I-beams 110. The I-beams 110 can be fixed or placed on the two uprights 10. The fixing method can be welding or bolt connection. In this embodiment, the I-beams 110 are placed on the two uprights 10.

[0022] In addition, a support plate 111 is welded to the top of the support frame 10. The support plate 111 is located on the side of the crossbeam 11 near the jacking direction of the tube body 6. It is used to limit the crossbeam 11 in the jacking direction, provide it with support force, and prevent the main beam 1 from sliding forward during use.

[0023] Furthermore, there are two anti-pull-out components 4, which are symmetrically arranged at both ends of the crossbeam 11. Specifically, they include embedded parts 40 pre-embedded in the ground and anchor rods 41 connected to the embedded parts 40. The top of the anchor rods 41 passes through the gap 112 and is provided with fasteners 42.

[0024] The embedded part 40 includes an embedded plate 401, which can be a steel plate. An embedded rod 402 is welded on the embedded plate 401. The embedded rod 402 is an L-shaped fine-rolled threaded steel bar. Its horizontal section is welded to the embedded plate 401. A threaded end is provided at the top and passes through the ground. A connecting sleeve 403 is installed on the threaded end.

[0025] It should be noted that the connecting sleeve 403 is a common commercially available steel bar connecting sleeve, so it will not be described here.

[0026] Anchor rod 41 is a vertical fine-rolled threaded steel bar with threaded ends at both the top and bottom. The threaded end at the bottom is connected to the connecting sleeve 403, thereby realizing its connection with the embedded part 40.

[0027] Fastener 42 includes a pad 420 with a size larger than the gap 112. The pad 420 may be a steel plate. The pad 420 is placed on the gap 112 and a fastening nut 421 with a threaded attachment installed on the top thread of the anchor rod 41 is tightened on it.

[0028] This design creates an effective pull-out anchoring structure.

[0029] The sliding limit assembly 3 includes a limit roller 317, which can be fixed to the bottom of the crossbeam 11 by welding.

[0030] In another embodiment, a lifting adjustment structure is also included, wherein the limiting roller 317 is movably and heightably mounted on the lifting adjustment structure, thereby achieving the effect of adjusting its specific height.

[0031] The lifting and adjusting structure includes an adjusting seat 310, which is adapted to the shape of the cavity formed between the two I-beams 110 and is installed therein. The adjusting seat 310 is provided with two guide holes 311 and one rotating hole 312. The rotating hole 312 is located between the two guide holes 311. An internally threaded sleeve 313 is rotatably disposed in the rotating hole 312. The internally threaded sleeve 313 is rotatably disposed in the rotating hole 312 via a bearing, and a concave-convex fit is provided between the internally threaded sleeve 313 and the rotating hole 312. The structure includes two guide rods 315 and a lead screw 316 on the top of the limiting roller 317. The two guide rods 315 are movably inserted through the corresponding guide holes 311. The lead screw 316 is threaded through the internal thread sleeve 313. The lengths of the lead screw 316 and the guide rods 315 meet the requirements of the lifting range of the limiting roller 317. In addition, the two ends of the lead screw 316 and the guide rods 315 pass through their cavities through the gap 112. The top of the internal thread sleeve 313 passes through the gap 112 and is provided with a rotation control part 314.

[0032] With this design, the rotation of the inner threaded sleeve 313 can be controlled by the rotation control unit 314, and then the height of the limiting roller 317 can be adjusted by the lead screw 316 installed in its internal thread, as well as the guide rod 315 and the guide hole 311.

[0033] In a preferred embodiment, the rotation control unit 314 is a driven gear, and a drive mechanism 32 for driving the driven gear to rotate is provided on the crossbeam 11. The drive mechanism 32 includes a drive device 320 and a transmission gear 321 that meshes with the rotation control unit 314. Specifically, the drive device 320 is a transmission combination device of a motor and a reducer. In this embodiment, the driven gear and the transmission gear 321 are compatible bevel gears.

[0034] With this design, the height of the limit roller 317 can be adjusted by controlling the operation of the drive device 320.

[0035] In use, firstly, embed the pre-embedded part 40 in the concrete base plate as the force point of the pull-out component 4. Then, fix the two uprights 10, the diagonal brace 2 and the support plate 111 of the portal frame 1 in the concrete base plate. Then, place the pipe body 6 on the jacking pipe slide rail 5, install the sliding limit component 3 at the bottom center of the crossbeam 11, and place the crossbeam 11 on the two uprights 10 so that the sliding limit component 3 is located at the highest point of the pipe body 6. Then, connect the anchor rod 41 to the pre-embedded part 40, and tighten it with fastener 42 after passing through the gap 112 on the crossbeam 11 from the top, thereby pulling the crossbeam 11 and limiting the upward displacement of the pipe body 6.

[0036] The above embodiments are merely preferred technical solutions of this utility model and should not be considered as limitations on this utility model. The protection scope of this utility model should be the technical solution described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the protection scope of this utility model.

Claims

1. A vertical limiting device for pipe jacking construction, comprising a pipe body (6), characterized in that: The vertical limiting device includes a portal frame (1) erected outside the tube (6), an anti-pull-out component (4) anchored in the ground on the portal frame (1), a diagonal brace (2) on the side of the portal frame (1) near the tube (6) in the jacking direction, and a sliding limiting component (3) that moves against the top of the tube (6) on the inner top wall of the portal frame (1).

2. The vertical limiting device for pipe jacking construction according to claim 1, characterized in that: The portal frame (1) includes two uprights (10) and a crossbeam (11) set on top of the two uprights (10), with a gap (112) provided on the crossbeam (11) for the pull-out component (4) to pass through.

3. The vertical limiting device for pipe jacking construction according to claim 2, characterized in that: The pull-out component (4) includes an embedded part (40) pre-embedded in the ground and an anchor rod (41) connected to the embedded part (40). The top of the anchor rod (41) passes through the gap (112) and is provided with a fastener (42).

4. The vertical limiting device for pipe jacking construction according to claim 3, characterized in that: The embedded part (40) includes an embedded plate (401), on which an embedded rod (402) is welded. The top end of the embedded rod (402) passes through the ground and is connected to the anchor rod (41) through a connecting sleeve (403). The fastener (42) includes a pad (420) with a size larger than the gap (112), and a fastening nut (421) with a threaded attachment on the pad (420) mounted on the top of the anchor rod (41).

5. A vertical limiting device for pipe jacking construction according to claim 3 or 4, characterized in that: There are two pull-out assemblies (4), which are symmetrically arranged at both ends of the crossbeam (11).

6. The vertical limiting device for pipe jacking construction according to claim 2, characterized in that: The diagonal bracing (2) includes diagonal bracing rods (20) provided on the side of the upright (10), and a reinforcing rod (21) is provided between the middle of the diagonal bracing rod (20) and the bottom of the upright (10).

7. The vertical limiting device for pipe jacking construction according to claim 2, characterized in that: The top of the support frame (10) is also welded with a support plate (111), which is located on the side of the crossbeam (11) near the tube body (6) in the jacking direction, and is used to limit the crossbeam (11) in the jacking direction.

8. The vertical limiting device for pipe jacking construction according to claim 2, characterized in that: The sliding limit assembly (3) includes a limit roller (317), which is fixed to the bottom of the crossbeam (11) by welding.

9. The vertical limiting device for pipe jacking construction according to claim 2, characterized in that: The crossbeam (11) comprises two vertically arranged I-beams (110); The sliding limit assembly (3) includes a lifting adjustment structure and a limit roller (317). The lifting adjustment structure includes an adjustment seat (310). The adjustment seat (310) is adapted to the shape of the cavity formed between the two I-beams (110) and is installed therein. The adjustment seat (310) is provided with two guide holes (311) and a rotating hole (312). The rotating hole (312) is rotatably provided with an internal thread sleeve (313). The top of the limit roller (317) is provided with two guide rods (315) and a screw (316) that pass through the gap (112). The two guide rods (315) respectively move through the guide rods (315) of the corresponding guide holes (311). The screw (316) is threaded through the internal thread sleeve (313). The top of the internal thread sleeve (313) passes out from the gap (112) and is provided with a rotation control part (314) for controlling the rotation of the internal thread sleeve (313).

10. A vertical limiting device for pipe jacking construction according to claim 9, characterized in that: The rotation control unit (314) is a driven gear, and a drive mechanism (32) for driving the driven gear to rotate is provided on the crossbeam (11). The drive mechanism (32) includes a drive device (320) and a transmission gear (321) that meshes with the rotation control unit (314) on it.

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