Pipe-jacking receiving well pipeline connecting structure
By using a multi-layer sealing structure and flexible connection in the pipe jacking receiving well, the leakage problem at the connection between the pipe jacking receiving well and the pipeline was solved, achieving high-efficiency sealing and seismic resistance requirements, and improving construction efficiency.
Patent Information
- Application Number
- CN202520795888.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-24
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-04-24
Smart Images
Figure CN223938897U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a pipe connection structure for a pipe jacking receiving well, belonging to the field of municipal engineering pipeline construction technology. Background Technology
[0002] Pipe jacking is a trenchless underground pipeline construction method that uses hydraulic jacking equipment to push reinforced concrete pipes section by section from a working shaft into the soil, eventually jacking them into a receiving shaft to form a continuous underground pipeline. However, in actual construction, due to limitations in construction skills, equipment, and other factors, the receiving holes for the pipe jacking machine in the receiving shaft are often quite large to ensure the smooth entry of the reinforced concrete pipes into the tunnel.
[0003] However, this larger reserved opening presents problems when sealing it later. The current conventional sealing method is to use expansive concrete to fill and seal it, but this method is easily affected by on-site operating conditions and poor quality filling materials, leading to leakage at the connection between the pipeline and the receiving manhole wall. Moreover, this traditional opening treatment method does not meet the requirements of the current "General Code for Seismic Resistance of Buildings and Municipal Engineering" (GB55002-2021) for flexible connections between underground pipelines and walls. If only simple rubber sealing rings are used for sealing, they are easily affected by groundwater pressure, soil corrosion, and other factors during long-term use, leading to aging, deformation, and a decline in sealing performance, resulting in leakage, affecting the normal use of the pipeline, and causing some pollution to the surrounding environment. Utility Model Content
[0004] This utility model provides a pipe connection structure for a pipe jacking receiving well to solve the problems of water leakage at the connection between the pipe and the receiving well wall caused by using expansive concrete to fill and seal, and the problem that using only simple rubber sealing rings for sealing is prone to aging and deformation due to groundwater pressure, soil corrosion and other factors during long-term use, resulting in a decline in sealing performance, leakage, affecting the normal use of the pipe and causing pollution to the surrounding environment.
[0005] This utility model is achieved through the following technical solution:
[0006] This utility model provides a pipe connection structure for a pipe jacking receiving well, including...
[0007] A pre-reserved opening in the receiving well is provided with a first sealing element and a second sealing element.
[0008] pipeline;
[0009] The pipe clamp is fitted around the outer periphery of the pipe, and the reserved opening of the receiving well is surrounded around the outer periphery of the pipe clamp; the pipe clamp includes a pipe clamp body and a flexible connection structure, the pipe clamp body abuts against the first sealing element and the second sealing element; the two sides of the flexible connection structure abut against the pipe clamp body and the pipe respectively.
[0010] In one embodiment of this utility model, the flexible connection structure includes sealant, asphalt-impregnated hemp fibers, and a waterstop strip, wherein the sealant and the asphalt-impregnated hemp fibers are symmetrically arranged on both sides of the waterstop strip.
[0011] In one embodiment of this utility model, the reserved opening of the receiving well includes a liner, which is a square liner. The liner assists in the alignment and leveling of the pipe clamp during installation.
[0012] In one embodiment of this utility model, the interval between two adjacent pads is 30°.
[0013] In one embodiment of this utility model, the reserved opening of the receiving well is stepped.
[0014] In one embodiment of this utility model, the pipe clamp body is stepped and is connected to the stepped part of the reserved opening of the receiving well.
[0015] In one embodiment of this utility model, the pipe clamp body is provided with reinforcing ribs. Multiple reinforcing ribs are distributed within the pipe clamp body to increase its strength.
[0016] In one embodiment of this utility model, a tongue and groove joint is included, the tongue and groove joint is inclined, and the second sealing member is located in the middle of the tongue and groove joint.
[0017] In one embodiment of this utility model, the second sealing element is a Q-type rubber ring with different thicknesses at both ends. This facilitates compression at the front end when the pipe clamp is connected to the reserved opening in the receiving well, increasing the sealing between the pipe clamp and the reserved opening in the receiving well, thus forming a second line of defense against water damage.
[0018] In one embodiment of this utility model, the first sealing element is an O-ring rubber ring, forming the first waterproof line between the reserved opening of the receiving well and the pipe clamp.
[0019] Beneficial effects
[0020] The pipe connection structure for the receiving well provided by this utility model includes a reserved opening in the receiving well, a pipe, and a pipe clamp. The reserved opening in the receiving well is equipped with a first sealing element and a second sealing element. The pipe clamp includes a pipe clamp body and a flexible connection structure. The pipe clamp body achieves water stoppage at the reserved opening in the receiving well by compressing the first and second sealing elements. The flexible connection structure is embedded between the pipe clamp body and the pipe. The flexible connection structure is composed of sealant, asphalt-impregnated hemp fibers, and a water-stop strip, fulfilling the requirement of flexible connection between the pipe clamp body and the pipe, and also solving the problem of leakage after the pipe deforms within a certain range. Moreover, the pipe clamp body can be prefabricated in the factory, which not only ensures the quality of the pipe clamp body but also shortens the construction cycle and improves work efficiency. Attached Figure Description
[0021] Figure 1 A cross-sectional view of the pipe connection provided by this utility model;
[0022] Figure 2 A cross-sectional view of the reserved opening for the receiving well provided by this utility model;
[0023] Figure 3 A cross-sectional view of the pipe clamp provided by this utility model;
[0024] Figure 4 A cross-sectional view of the pipe clamp body provided by this utility model;
[0025] Figure 5 A schematic diagram of the installation process provided by this utility model;
[0026] In the picture:
[0027] 1. Receiving well reserved opening; 11. Tongue and groove joint; 12. First sealing element; 13. Gasket; 14. Second sealing element; 2. Pipe clamp; 21. Pipe clamp body; 22. Flexible connection structure; 221. Sealant; 222. Asphalt-impregnated hemp fiber; 223. Waterstop strip; 25. Reinforcing rib; 3. Pipeline. Detailed Implementation
[0028] 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, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.
[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0030] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.
[0031] like Figures 1 to 5 As shown in the figure, this application embodiment provides a pipe connection structure for a pipe jacking receiving well. This pipe connection structure is installed between the reserved opening 1 of the receiving well and the pipe 3, which can avoid water leakage at the connection between the pipe 3 and the well wall of the reserved opening 1, ensuring the normal use of the pipe 3. The pipe connection structure for the pipe jacking receiving well includes a reserved opening 1, a pipe clamp 2, and a pipe 3. Both the reserved opening 1 and the pipe clamp 2 are annular. The pipe clamp 2 is fitted around the outer circumference of the pipe 3, and the reserved opening 1 is fitted around the outer circumference of the pipe clamp 2 and abuts against the pipe clamp 2. The side of the reserved opening 1 near the pipe clamp 2 is stepped, and the side of the pipe clamp 2 near the reserved opening 1 is also stepped, which can cooperate with the step of the reserved opening 1 to make the pipe clamp 2 and the reserved opening 1 of the receiving well socketed. The pipe clamp 2 and the reserved opening 1 of the receiving well are rigidly connected, which can seal the reserved opening of the reserved opening 1 of the receiving well to stop water. The pipe clamp 2 and the pipe 3 are connected flexibly, which can seal the pipe 3 and prevent it from leaking.
[0032] like Figure 2As shown, in some embodiments, the reserved opening 1 of the receiving well includes a tongue and groove joint 11, a first sealing element 12, a gasket 13, and a second sealing element 14. The tongue and groove joint 11 is provided on the side of the reserved opening 1 of the receiving well near the pipe clamp 2, and the tongue and groove joint 11 is inclined. The first sealing element 12 is provided on the horizontal cross-section of the reserved opening 1 of the receiving well, and the first sealing element 12 is located between the reserved opening 1 of the receiving well and the pipe clamp 2. The first sealing element 12 is an O-ring rubber ring. By pressing the first sealing element 12 against the pipe clamp 2, the first waterproof line between the reserved opening 1 of the receiving well and the pipe clamp 2 is formed. The reserved opening 1 of the receiving well is stepped, and a gasket 13 is provided at the center of its vertical cross-section. The gaskets 13 are evenly distributed around the opening, and the interval between two adjacent gaskets 13 is 30°. The gaskets 13 can assist in the alignment and leveling of the pipe clamp 2 during the installation process. The second sealing element 14 is located in the middle of the tongue and groove joint 11. The second sealing element 14 is a Q-type rubber ring. The thickness of the end closest to the first sealing element 12 is greater than the thickness of the other end, which facilitates the front end to be squeezed when the pipe clamp 2 is connected to the reserved opening 1 of the receiving well, thereby increasing the sealing between the pipe clamp 2 and the reserved opening 1 of the receiving well and forming a second waterproof line. By setting the first sealing element 12, the gasket 13 and the second sealing element 14, and making the reserved opening 1 of the receiving well and the pipe clamp 2 into a stepped shape, the water-stopping effect at the reserved opening 1 of the receiving well can be improved.
[0033] like Figure 1 , Figure 3 and Figure 4 As shown, in some embodiments, the clamp 2 includes a clamp body 21, which is an annular clamp fitted onto the outside of the pipe 3. Its shape is stepped, matching the shape of the pre-reserved opening 1 in the receiving well. Reinforcing ribs 25 are provided inside the clamp body 21, with multiple reinforcing ribs 25 distributed within the clamp body 21 to increase its strength. The clamp body 21 can be prefabricated in a factory, ensuring its quality and shortening the construction cycle while improving work efficiency. A flexible connection structure 22 is filled between the clamp body 21 and the pipe 3. The flexible connection structure 22 surrounds the outer circumference of the pipe 3. The flexible connection structure 22 can solve the problem of water leakage after the concrete pipe 3 deforms within a certain range and also meets the requirements of the "General Code for Seismic Design of Buildings and Municipal Engineering" (GB55002-2021) for flexible connections between underground pipelines and walls. The flexible connection structure 22 includes sealant 221, asphalt-impregnated hemp fiber 222, and a waterstop strip 223. Starting from the end of the pipe clamp body 21 near the first sealing element 12, the flexible connection structure 22 is filled in sequence, followed by the filling of sealant 221, asphalt hemp fiber 222, waterstop strip 223, asphalt hemp fiber 222 and sealant 221. The sealant 221 and asphalt hemp fiber 222 are symmetrically arranged about the waterstop strip 223.
[0034] Optionally, the pad 13 is a 20x50mm square pad with a flat surface.
[0035] Optionally, the waterstop strip 223 is a water-swellable rubber waterstop strip, and the sealant 221 is a polyurethane sealant.
[0036] like Figure 5 As shown, this application provides a method for connecting pipelines in a pipe jacking receiving well, including the following steps:
[0037] Step 1: Reserve the opening of the receiving well
[0038] according to Figure 2 The structure of the reserved opening 1 of the receiving well is shown. The second sealing element 14 is pre-embedded at the center of its inclined surface. A ring of gasket 13 is pre-embedded at the center of the vertical section of the reserved opening 1 of the receiving well. The interval between two adjacent gaskets 13 is 30°. The first sealing element 12 is pre-embedded at the center of the horizontal section.
[0039] Step 2: Lowering the receiving well and positioning the pipeline.
[0040] After the receiving well is lowered and sealed at the design elevation, the axis and elevation of the jacking pipe are checked using a total station or laser rangefinder; ultrasonic or radiographic testing is performed on the concrete pipe wall to check for hidden cracks or damage.
[0041] Step 3: Installation of pipe clamp body 21
[0042] Before installing the clamp body 21, remove the mud, sand, and debris from the inside of the tongue and groove joint 11 and apply lubricant. Use a support to move the clamp body 21 to the opening, align the clamp axis with a total station, and then slowly insert the clamp body 21 into the bottom of the tongue and groove joint 11, avoiding deviation. Mark the positioning line at the end of the clamp body to ensure that the insertion depth of the clamp body meets the requirements. After installation, check whether the second sealing element 14 is evenly compressed. If there is serious misalignment or leakage, it needs to be removed and reinstalled.
[0043] Step 4: Filling the flexible connection structure 22
[0044] After the pipe clamp body 21 is installed, the gap between the pipe clamp body 21 and the pipe 3 needs to be filled. Apply sealant 221 evenly to the far end of the pipe 3 with a tool. After the sealant 221 has cured and set, continue to fill the gap with asphalt-impregnated hemp fibers 222 that are half the width of the gap. Then fill the gap symmetrically with waterstop strips 223. Then fill the remaining gap with asphalt-impregnated hemp fibers 222. Finally, apply sealant 221 to the near end to seal it, forming a flexible connection between the pipe clamp body 21 and the pipe 3.
[0045] Step 5: Water tightness test
[0046] After the flexible connection between the pipe clamp body 21 and the pipe 3 is completed and accepted, a water tightness test is carried out according to the design requirements.
[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0048] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model.
[0049] This document uses specific embodiments to illustrate the principles and implementation methods of this utility model. The descriptions of these embodiments are merely for the purpose of helping to understand the method and core ideas of this utility model. It should be noted that those skilled in the art can make various improvements and modifications to this utility model without departing from its principles, and these improvements and modifications also fall within the protection scope of the claims of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.
Claims
1. A pipe connection structure for a pipe jacking receiving well, characterized in that, include: The receiving well has a reserved opening (1), which is provided with a first sealing element (12) and a second sealing element (14); Pipeline (3); Pipe clamp (2), the pipe clamp (2) is fitted around the outer periphery of the pipe (3), and the reserved opening (1) of the receiving well is arranged around the outer periphery of the pipe clamp (2); the pipe clamp (2) includes a pipe clamp body (21) and a flexible connection structure (22), the pipe clamp body (21) abuts against the first sealing element (12) and the second sealing element (14); the flexible connection structure (22) abuts against the pipe clamp body (21) and the pipe (3) on both sides respectively.
2. The pipe connection structure for a pipe jacking receiving well according to claim 1, characterized in that, The flexible connection structure (22) includes sealant (221), asphalt-impregnated hemp fibers (222), and a waterstop strip (223). The sealant (221) and the asphalt-impregnated hemp fibers (222) are symmetrically arranged on both sides of the waterstop strip (223).
3. The pipe connection structure for a pipe jacking receiving well according to claim 1, characterized in that, The reserved opening (1) of the receiving well includes a liner (13), which is a square liner.
4. The pipe connection structure for a pipe jacking receiving well according to claim 3, characterized in that, The two adjacent pads (13) are spaced 30° apart.
5. The pipe connection structure for a pipe jacking receiving well according to claim 3, characterized in that, The reserved opening (1) of the receiving well is stepped.
6. The pipe connection structure for a pipe jacking receiving well according to claim 5, characterized in that, The pipe clamp body (21) is stepped and is connected to the stepped part of the reserved opening (1) of the receiving well.
7. The pipe connection structure for a pipe jacking receiving well according to claim 6, characterized in that, The clamp body (21) is provided with reinforcing ribs (25) inside.
8. The pipe connection structure for a pipe jacking receiving well according to claim 1, characterized in that, It includes a tongue and groove joint (11), which is inclined, and the second seal (14) is located in the middle of the tongue and groove joint (11).
9. A pipe connection structure for a pipe jacking receiving well according to claim 8, characterized in that, The second seal (14) is a Q-type rubber ring with different thicknesses at its two ends.
10. The pipe connection structure for a pipe jacking receiving well according to claim 1, characterized in that, The first sealing element (12) is an O-ring.