A pipe joint interval opening control device for curve pipe jacking
By using a pipe section opening control device that combines tie rod jacks and hydraulic jacks in curved pipe jacking construction, the problem of difficult opening control in curved pipe jacking was solved, achieving high-precision axis control and reducing construction deviations.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG FOUND ENG GRP CO LTD
- Filing Date
- 2025-08-04
- Publication Date
- 2026-06-26
AI Technical Summary
In curved pipe jacking construction, it is difficult to accurately control the opening between pipe sections, which leads to deviation of the jacking axis and increases the construction difficulty and cost.
A pipe section opening control device, employing a combination of lever-type jacks and hydraulic jacks, actively adjusts the opening amount to ensure axis control quality and reduce the amount of correction required.
It achieves high-precision control of the opening between pipe sections, ensuring the accuracy of the axis of curved pipe jacking, and is applicable to pipe jacking of various cross-sectional sizes and forms, reducing construction deviations.
Smart Images
Figure CN224413658U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipe jacking construction technology, and in particular to a pipe section opening control device for curved pipe jacking. Background Technology
[0002] Pipe jacking is a construction technique that uses a jacking device to advance pipes section by section underground to form a tunnel. It is an important form of converting open-cut to cut-and-cover construction and is widely used in underground space construction. Curved pipe jacking is a cutting-edge technology in pipe jacking and is often used in pipeline laying and tunnel construction in central cities where obstacles in the direction of advancement require curvature, or in special pipe jacking projects with other special requirements that necessitate bending of the pipe jacking axis. It is generally suitable for socket-type pipe sections. The axis of a curved pipe jacking pipe appears curved from a macroscopic perspective, but is actually polygonal. Structurally, its curvature is concentrated at the joints between pipe sections.
[0003] Curved pipe jacking involves excavating a cavity with a specific arc using a pipe jacking machine. Straight, rigid pipe sections move along this arc-shaped trajectory, ultimately forming a curved tunnel. Since the pipe sections are straight, rigid bodies and cannot bend during movement, the formation of the curved pipe jacking axis depends on the difference in opening between the left and right sides of the socket-type pipe sections. Precisely controlling the opening between pipe sections is crucial for achieving high-precision curved pipe jacking. However, during the jacking process, to ensure the smooth movement of the straight pipe sections within the arc-shaped trajectory, the cavity excavated by the pipe jacking machine must allow for sufficient over-excavation. This necessary over-excavation significantly increases the difficulty of precisely controlling the opening between pipe sections. Therefore, this invention provides a pipe section opening control device for curved pipe jacking. Utility Model Content
[0004] To address the shortcomings of existing technologies, this invention provides a pipe section opening control device for curved pipe jacking, which solves the aforementioned problems.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A pipe section opening control device for curved pipe jacking includes a pipe section body, a connecting assembly on the facing surfaces of the pipe section body, a pre-embedded steel plate inside the pipe section body, a tension steel plate welded to the inner side of the pre-embedded steel plate, a first compression steel plate welded to the inner side of the pre-embedded steel plate, a second compression steel plate welded to the inner side of the pre-embedded steel plate, a hydraulic jack on the right side of the second compression steel plate, the output end of the hydraulic jack being connected to the first compression steel plate on another pipe section body, a fixing pin welded to the inner side of the pre-embedded steel plate, a pull rod type jack on the surface of the fixing pin, and the output end of the pull rod type jack being connected to the tension steel plate on another pipe section body.
[0007] Preferably, the connecting assembly includes a wooden pad filled on the facing surface of the pipe section body, and the outer and inner sides of the wooden pad are filled with polysulfide sealant.
[0008] Preferably, a first supporting steel plate is welded to the inner side of the embedded steel plate, and the first supporting steel plate is welded to the second pressure-bearing steel plate.
[0009] Preferably, a second supporting steel plate is welded to the inner side of the embedded steel plate, and the second supporting steel plate is welded to the tension steel plate.
[0010] Preferably, a third supporting steel plate is welded to the inner side of the embedded steel plate, and the third supporting steel plate is welded to the first pressure-bearing steel plate.
[0011] Preferably, a hook is welded to the outside of the pre-embedded steel plate, and the hook is embedded inside the pipe section body.
[0012] Preferably, the number of hooks is multiple, and the multiple hooks are symmetrically distributed.
[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The pipe section opening control device for curved pipe jacking adopts a combination of tie rod jacks and hydraulic jacks to actively adjust the opening amount. It is not affected by the external soil properties and the over-excavation amount of the pipe jacking machine, and the axis control quality is effectively guaranteed. It controls the opening amount between pipe sections of curved pipe jacking with high precision, making the axis of curved pipe jacking accurate and reducing the amount of correction. It can be applied to pipe jacking with various cross-sectional sizes and shapes (circular, rectangular). In this embodiment, only two tie rod jacks and hydraulic jacks are used for each gap between pipe sections, which is the minimum number of jacks required to use this device. The number of jacks can be flexibly increased according to the cross-sectional size of the pipe jacking and the difficulty of opening. Attached Figure Description
[0014] Figure 1 This is a three-dimensional perspective view of the present invention;
[0015] Figure 2 This is a top sectional view of the present invention;
[0016] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle;
[0017] Figure 4 This is a partial structural diagram of the present invention;
[0018] Figure 5 This is a partial structural diagram of the present invention.
[0019] In the diagram: 1. Pipe section body; 2. Wooden pad; 3. Polysulfide sealant; 4. Embedded steel plate; 5. Hook; 6. First supporting steel plate; 7. Tension steel plate; 8. First compression steel plate; 9. Second compression steel plate; 10. Hydraulic jack; 11. Fixing pin; 12. Pull rod jack; 13. Second supporting steel plate; 14. Third supporting steel plate. Detailed Implementation
[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0021] Example: Refer to Figure 1-5 A pipe section opening control device for curved pipe jacking includes a pipe section body 1. Connecting components are arranged on opposite faces of the pipe section body 1. An embedded steel plate 4 is disposed inside the pipe section body 1. Hooks 5 are welded to the outer side of the embedded steel plate 4 and are embedded inside the pipe section body 1. Multiple hooks 5 are arranged symmetrically to ensure stable installation of the embedded steel plate 4 in the middle of the pipe section body 1 and prevent displacement. A tension steel plate 7, a first compression steel plate 8, and a second compression steel plate 9 are welded to the inner side of the embedded steel plate 4. A hydraulic jack 10 is disposed to the right of the second compression steel plate 9. The output end of the hydraulic jack 10 is connected to the first compression steel plate 8 on another pipe section body 1. The inner side of the embedded steel plate 4 is welded with… A fixing pin 11 is provided, and a tie rod type jack 12 is provided on the surface of the fixing pin 11. The output end of the tie rod type jack 12 is connected to the tension steel plate 7 on another pipe section body 1. This pipe section opening control device for curved pipe jacking uses tie rod type jack 12 and hydraulic jack 10 in combination to actively adjust the opening amount. It is not affected by the external soil properties and the over-excavation amount of the pipe jacking machine, and the axis control quality is effectively guaranteed. It controls the opening amount between pipe sections of curved pipe jacking with high precision, so that the axis of curved pipe jacking is accurate and the amount of correction is reduced. It can be applied to pipe jacking with various cross-sectional sizes and cross-sectional shapes (circular, rectangular). In this embodiment, only two tie rod type jacks 12 and hydraulic jacks 10 are used for each gap between a single pipe section, which is the minimum number of devices used. The number of jacks can be flexibly increased according to the cross-sectional size of the pipe jacking and the difficulty of opening.
[0022] Specifically, the connecting components include a wooden pad 2 filled on the facing surfaces of the pipe section body 1. Both the outer and inner sides of the wooden pad 2 are filled with polysulfide sealant 3. The wooden pad 2 and the polysulfide sealant 3 facilitate better sealing between the two pipe section bodies 1.
[0023] Specifically, a first supporting steel plate 6 is welded to the inner side of the embedded steel plate 4. The first supporting steel plate 6 is welded to the second compression steel plate 9. The first supporting steel plate 6 strengthens the second compression steel plate 9, making it less prone to bending. A second supporting steel plate 13 is welded to the inner side of the embedded steel plate 4. The second supporting steel plate 13 is welded to the tension steel plate 7. The second supporting steel plate 13 strengthens the tension steel plate 7, making it less prone to bending. A third supporting steel plate 14 is welded to the inner side of the embedded steel plate 4. The third supporting steel plate 14 is welded to the first compression steel plate 8. The third supporting steel plate 14 strengthens the first compression steel plate 8, making it less prone to bending.
[0024] All electrical components mentioned in this article are connected to an external main controller and 220V AC mains power. The main controller can be any conventional known device, such as a computer, that can control the operation of the electrical components mentioned in the article.
[0025] In use: The hook 5 on the pipe section body 1 is embedded inside the pipe section body 1. Generally, the pre-embedded steel plate 4 is installed at the front and rear middle positions of the pipe section body 1. Wooden pads 2 and polysulfide sealant 3 are filled between two pipe sections body 1. Then, the hydraulic jack 10 is installed between the second pressure-bearing steel plate 9 and the first pressure-bearing steel plate 8 on another pipe section body 1. The hydraulic jack 10 is connected to the oil pump station and linked to the main controller. The pull rod jack 12 is installed between the fixed pin 11 and the tension steel plate 7 on another pipe section body 1. This process is repeated to complete the installation between multiple pipe sections body 1. The pipe section body 1 is lowered into the well by hoisting, followed by pipe jacking. When entering the curved section for jacking, the hydraulic jack 10 extends according to the calculated opening amount in the opening zone. The extension rate matches the jacking speed. Once the predetermined opening amount is reached, the extension of the hydraulic jack 10 stops. Maintain the extension of the jacks while appropriately tightening the tie rod jacks 12. Keep the tie rod jacks 12 tightened in the tightened area. When operating on multi-radius curve jacking, the opening amount can be controlled with high precision and flexibility by using tie rod jacks 12 and hydraulic jacks 10 in combination. When operating on a curve-to-straight curve jacking, the tie rod jacks 12 on both sides can be tightened when entering the straight section, so that the opening amount of the straight section is 0. When operating on a reverse curve jacking, the tie rod jacks 12 in the tightened area can be loosened when entering the reverse section of the curve, and the hydraulic jacks 10 can be extended. At the same time, the tie rod jacks 12 in the opening area can be tightened to achieve rapid entry into the reverse section. After the tunnel is completed, the opening gap between the pipe sections 1 in the opening area is filled with conventional filler material and solidified. At the same time, the mud around the pipe is replaced and the tunnel perimeter is solidified. Then the oil pump is released and the jacks, steel components, etc. are removed.
[0026] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A pipe section opening control device for curved pipe jacking, comprising a pipe section body (1), characterized in that, The pipe section body (1) is provided with a connecting component facing each other. The pipe section body (1) is provided with a pre-embedded steel plate (4). A tension steel plate (7) is welded to the inside of the pre-embedded steel plate (4). A first compression steel plate (8) is welded to the inside of the pre-embedded steel plate (4). A second compression steel plate (9) is welded to the inside of the pre-embedded steel plate (4). A hydraulic jack (10) is provided on the right side of the second compression steel plate (9). The output end of the hydraulic jack (10) is connected to the first compression steel plate (8) on another pipe section body (1). A fixing pin (11) is welded to the inside of the pre-embedded steel plate (4). A tie rod jack (12) is provided on the surface of the fixing pin (11). The output end of the tie rod jack (12) is connected to the tension steel plate (7) on another pipe section body (1).
2. The pipe segment opening control device for curved pipe jacking according to claim 1, characterized in that, The connecting assembly includes a wooden pad (2) filled on the facing side of the pipe section body (1), and the outer and inner sides of the wooden pad (2) are filled with polysulfide sealant (3).
3. The pipe section opening control device for curved pipe jacking according to claim 1, characterized in that, The first supporting steel plate (6) is welded to the inner side of the pre-embedded steel plate (4), and the first supporting steel plate (6) is welded to the second pressure-bearing steel plate (9).
4. The pipe section opening control device for curved pipe jacking according to claim 1, characterized in that, The inner side of the pre-embedded steel plate (4) is welded with a second supporting steel plate (13), and the second supporting steel plate (13) is welded to the tension steel plate (7).
5. The pipe section opening control device for curved pipe jacking according to claim 1, characterized in that, The inner side of the pre-embedded steel plate (4) is welded with a third supporting steel plate (14), and the third supporting steel plate (14) is welded to the first pressure-bearing steel plate (8).
6. The pipe segment opening control device for curved pipe jacking according to claim 1, characterized in that, The pre-embedded steel plate (4) is welded with hooks (5) on the outside, and the hooks (5) are embedded inside the pipe section body (1).
7. A pipe section opening control device for curved pipe jacking according to claim 6, characterized in that, The number of hooks (5) is multiple, and the multiple hooks (5) are symmetrically distributed.