Pipe joint water stop structure for pipe jacking construction
By using a combination of a first waterstop and a fixing component in pipe jacking construction, the problem of poor sealing at pipe joints was solved, achieving sealing stability and waterproofing during construction.
Patent Information
- Application Number
- CN202423183227.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-23
- Publication Date
- 2026-02-03
- Estimated Expiration
- 2034-12-23
AI Technical Summary
During pipe jacking construction, misalignment can easily occur at the pipe section connection, leading to gaps in the sealing ring and allowing external mud and water to enter the pipe section, affecting normal use.
The first waterstop is wrapped around the inner circumferential wall axis of the pipe section and fixed to the inner wall of the pipe section by a fixing component. The middle part of the first waterstop is arched to accommodate the movement of the pipe section. Combined with the support ring and the fixing component, the bonding effect is improved and the risk of breakage is reduced.
This effectively reduces the possibility of external mud and water entering the pipe section through gaps, ensuring a sealing effect, preventing water accumulation inside the pipe section, and ensuring smooth construction.
Smart Images
Figure CN223868016U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the technical field of municipal construction, and in particular to a water-stopping structure for pipe joints used in pipe jacking construction. Background Technology
[0002] Pipe jacking is a trenchless construction method, a technique for laying pipe sections with little or no excavation. In pipe jacking, the jacking force generated by jacking equipment within the working pit overcomes the friction between the pipe section and the surrounding soil, pushing the pipe section into the ground at the designed slope, and then removing the excavated soil. After one pipe section is jacked into the soil, the second section is lowered and the jacking continues. The principle is to use the thrust from the main jacking cylinder and the sections between them, as well as intermediate jacking stations, to advance the tool pipe or tunneling machine from the working pit through the soil to the receiving pit where it is lifted. The pipe section is then buried between the two pits, following closely behind the tool pipe or tunneling machine.
[0003] When multiple pipe sections are connected, a sealing ring is usually installed between the two pipe sections for sealing. However, during the tunneling process, the pipe sections are pushed in the soil, and their connection points need to withstand a large pressure. Therefore, the two pipe sections are prone to misalignment. The thickness of the sealing ring itself is also limited, and gaps may appear between the two pipe sections. At this time, sewage in the external soil can easily enter the pipe section, affecting the normal use of the pipe section in the future. Therefore, improvements are needed. Utility Model Content
[0004] To reduce the possibility of external mud and water entering the pipe section through the gaps, this application provides a water-stopping structure for pipe joints in pipe jacking construction.
[0005] This application provides a water-stopping structure for pipe joints used in pipe jacking construction, which adopts the following technical solution:
[0006] A water-stopping structure for a pipe joint in pipe jacking construction includes a first water-stop strip wound around the axis of the inner circumferential wall of the pipe joint and a fixing component for fixing the first water-stop strip to the pipe joint. The two sides of the first water-stop strip abut against the inner circumferential walls of the two pipe joints respectively, and the middle part of the first water-stop strip is arched in a direction away from the pipe joint.
[0007] By adopting the above technical solution, the two sides of the first waterstop are abutted against the inner circumferential walls of the two pipe sections, and then fixed to the inner wall of the pipe section by fixing components. Since the pipe sections will move to a certain extent during the pipe jacking construction, the middle part of the first waterstop is arched away from the pipe section to accommodate the stretching during the movement of the two adjacent pipe sections, thereby waterproofing and reducing the possibility of the first waterstop breaking during the movement, thereby further reducing the possibility of external mud and water entering the pipe section through the gap.
[0008] Preferably, the fixing assembly includes a first adhesive layer disposed between the inner wall of the pipe section and the first waterstop, a support ring abutting against the surface of the first waterstop away from the pipe section, and a fixing member passing through the support ring to fix it to the inner wall of the pipe section. Two support rings are provided and abut against both sides of the first waterstop respectively.
[0009] By adopting the above technical solution, after the first adhesive layer is used for initial fixation, the first waterstop at the top may detach from the first adhesive layer due to gravity, resulting in a relatively poor bonding effect. To address this, a support ring is used for support, and the support ring is fixed by fixing bolts to further fix the first waterstop, thereby improving the bonding effect between the first adhesive layer and the first waterstop.
[0010] Preferably, the fastener includes a screw rod passing through the support ring, a nut threaded to the screw rod, and a second adhesive layer disposed outside the screw rod. The nut abuts against the support ring. The first waterstop strip has a first through hole along its thickness direction for the screw rod to pass through. The support ring has a second through hole along its thickness direction for the screw rod to pass through. The inner wall of the pipe section has an installation groove for the screw rod to be inserted. The second adhesive layer is disposed in the installation groove.
[0011] By adopting the above technical solution, after applying adhesive to the mounting groove, the screw is inserted into the mounting groove. After the adhesive solidifies, a second adhesive layer is formed to fix the screw. Compared with directly fixing the support ring to the first waterstop with bolts, the connection strength between the screw and the pipe section is relatively stronger, which can reduce the possibility of relative rotation of the screw due to external forces. Then, adhesive is applied to the inner circumferential walls of the two pipe sections, and the first waterstop is bonded to the inner wall of the pipe section with adhesive. Then, the support ring is installed on the first waterstop for fixation with a nut.
[0012] Preferably, the support ring comprises a plurality of abutting arc-shaped plates.
[0013] By adopting the above technical solution, compared with the integrally formed support ring, the support ring formed by several mutually abutting arc-shaped plates will have a relatively better fixing effect on the first waterstop and will be more suitable. This can reduce the possibility of gaps between the integrally formed support ring and the first waterstop, thereby further improving the fixing effect on the first waterstop.
[0014] Preferably, one of the two adjacent arc-shaped plates has a first inclined surface that is inclined downward on its end face, and the other arc-shaped plate has a second inclined surface that abuts against the first inclined surface.
[0015] By adopting the above technical solution, and by setting the first inclined surface and the second inclined surface, during the process of connecting the first inclined surface to the second inclined surface and the screw rod by the nut thread, one of the arc-shaped plates can apply a certain pressure to the other arc-shaped plate in the vertical direction, thereby increasing the pressure on the first waterstop and improving the connection strength in the vertical direction.
[0016] Preferably, the two end faces of the arc plate are respectively provided with a third inclined surface and a fourth inclined surface. The third inclined surface and the fourth inclined surface are symmetrically arranged along the thickness direction of the arc plate. The third inclined surface of two adjacent arc plates abuts against the fourth inclined surface. The second through hole on at least one arc plate is a round hole, and the second through hole on the other arc plates is an oblong hole.
[0017] By adopting the above technical solution, when the nut is installed on the screw, since the second through hole on one of the arc plates is a round hole, during the compression and fixing process, the other arc plates can be pushed to move relative to each other to compress the first waterstop, thereby improving the fixing effect of the first waterstop.
[0018] Preferably, the two ends of the first waterstop are respectively inserted into the gap between the ends of two of the arc-shaped plates, and respectively abut against the surfaces of the two arc-shaped plates away from the pipe section.
[0019] By adopting the above technical solution, the two ends of the first waterstop are respectively inserted into the gap between the ends of the two arc-shaped plates and respectively abut against the surfaces of the two arc-shaped plates away from the pipe section. Compared with setting the ends of the first waterstop in an overlapping manner and then fixing it through the arc-shaped plates, the possibility of gaps appearing between the first waterstop and the arc-shaped plates can be reduced, thereby improving the fixing effect of the first waterstop.
[0020] Preferably, it further includes a second waterstop strip wound around the outer peripheral wall of the pipe section, with the two sides of the second waterstop strip abutting against the outer peripheral walls of the two pipe sections respectively. The outer peripheral wall of the pipe section is provided with a slot for inserting the second waterstop strip. A third adhesive layer is provided between the pipe section and the second waterstop strip. The pipe section is provided with a fixing ring that is fitted into the slot. The end face of the pipe section is provided with a guide surface communicating with the slot. The middle part of the second waterstop strip is arched towards the guide surface.
[0021] By adopting the above technical solution, the second waterstop is bonded to both sides of the pipe section via a third adhesive layer and fixed with retaining rings. This fixes both pipe sections and provides a certain degree of fixation for the second waterstop. Furthermore, the middle of the second waterstop is arched towards the guide surface to accommodate potential relative movement between adjacent pipe sections, thereby providing initial water-stopping effects on gaps in the outer perimeter of the pipe section.
[0022] In summary, this utility model has the following beneficial effects:
[0023] After the two sides of the first waterstop are abutted against the inner circumferential walls of the two pipe sections, they are fixed to the inner wall of the pipe sections by fixing components. Since the pipe sections will move to a certain extent during the pipe jacking construction, the middle part of the first waterstop is arched away from the pipe section to accommodate the stretching during the movement of the two relative pipe sections, thereby waterproofing and reducing the possibility of the first waterstop breaking during the movement, thereby further reducing the possibility of external mud and water entering the pipe section through the gaps. Attached Figure Description
[0024] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application;
[0025] Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of this application;
[0026] Figure 3 yes Figure 2 A magnified view of part A in the middle;
[0027] Figure 4 yes Figure 1 A magnified view of part B in the middle section;
[0028] Figure 5 yes Figure 1 A magnified view of part C in the middle;
[0029] Figure 6 This is a schematic diagram of the structure of Embodiment 2 of this application;
[0030] Figure 7 This is a schematic diagram of the support ring structure in Embodiment 3 of this application;
[0031] Figure 8 This is a schematic diagram of the support ring structure in Embodiment 4 of this application.
[0032] Explanation of reference numerals in the attached drawings: 1. Pipe section; 11. Slot; 111. Guide surface; 12. Mounting groove; 2. First waterstop; 21. First arch; 22. First perforation; 3. Fixing component; 31. First adhesive layer; 32. Support ring; 321. Arc plate; 33. Fixing element; 331. Screw; 332. Second adhesive layer; 333. Spring washer; 334. Rubber washer; 335. Nut; 4. Fixing ring; 5. Second perforation; 6. Second waterstop; 61. Third adhesive layer; 62. Second arch; 7. First inclined surface; 71. Second inclined surface; 8. Third inclined surface; 81. Fourth inclined surface. Detailed Implementation
[0033] The following is in conjunction with the appendix Figure 1-8 This application will be described in further detail below.
[0034] This application discloses a water-stopping structure for pipe joints used in pipe jacking construction.
[0035] Example 1:
[0036] A water-stopping structure for pipe joints used in pipe jacking construction, referring to Figure 1 , Figure 2 The system includes a first waterstop 2 wound around the inner circumferential wall axis of pipe section 1 and a fixing assembly 3 for fixing the first waterstop 2 to pipe section 1. It should be noted that the pipe sections 1 can be fixed by fixing rings 4. The outer circumferential wall of pipe section 1 is provided with slots 11 for the fixing rings 4 to be inserted. The fixing rings 4 can be, for example, in the form of clamps to fix the two pipe sections 1. Since clamps are existing technology, they will not be described in detail here.
[0037] In this embodiment, the first waterstop 2 can be made of rubber or polyurethane, depending on the specific requirements. Both have a certain degree of sealing, softness and elasticity. The two sides of the first waterstop 2 abut against the inner peripheral walls of the two pipe sections 1 respectively, and the middle part of the first waterstop 2 is arched in the direction away from the pipe section 1 to form the first arched part 21 to accommodate the stretching when the two adjacent pipe sections 1 move.
[0038] Reference Figure 2 , Figure 3 Regarding the fixing of the first waterstop 2, in this embodiment, the fixing component 3 specifically includes a first adhesive layer 31 disposed between the inner wall of the pipe section 1 and the first waterstop 2, a support ring 32 abutting against the surface of the first waterstop 2 away from the pipe section 1, and a fixing member 33 passing through the support ring 32 to fix it to the inner wall of the pipe section 1. In this embodiment, the first adhesive layer 31 can be formed by curing epoxy resin adhesive or neoprene rubber adhesive, depending on the requirements. There are two first adhesive layers 31, which are respectively disposed on both sides of the first waterstop 2, for bonding the first waterstop 2 to the pipe section 1.
[0039] Reference Figure 2 , Figure 4 The support ring 32 has two parts and abuts against both sides of the first waterstop 2. The support ring 32 specifically includes several abutting arc-shaped plates 321. In this embodiment, a support ring 32 has at least three arc-shaped plates 321. The arc-shaped plates 321 are made of steel plates, specifically stainless steel plates, which can reduce the possibility of rust. The arc-shaped plates 321 abut against the surface of the first waterstop 2 away from the pipe section 1.
[0040] Reference Figure 5It should be noted that, in this embodiment, the two ends of the first waterstop 2 are respectively inserted through the gap between the ends of the two arc-shaped plates 321, and respectively abut against the surfaces of the two arc-shaped plates 321 away from the pipe section 1. The ends of the first waterstop 2 can be glued to the surfaces of the arc-shaped plates 321 away from the pipe section 1 with adhesive.
[0041] Back Figure 2 , Figure 3 The fixing element 33 is provided at intervals along the axis of the arc plate 32, with at least two elements. Specifically, the fixing element 33 includes a screw 331 passing through the arc plate 321, a second adhesive layer 332 outside the screw 331, a spring washer 333 and a rubber washer 334 sleeved on the screw 331, and a nut 335 threaded to the screw 331. For fixing the screw 331, the inner circumferential wall of the pipe section 1 has an installation groove 12 for inserting the screw 331. The second adhesive layer 332 is built into the installation groove 12. It should be noted that the second adhesive layer 332 can also use the same adhesive as the first adhesive layer 31 to fix the screw 331. Since chemical adhesive tubing is existing technology, it will not be described in detail here. The first waterstop 2 has a first through hole 22 through its thickness for the screw 331 to pass through, and the arc plate 321 has a second through hole 5 through its thickness for the screw 331 to pass through. In this embodiment, the second through hole 5 is a circular hole. The spring washer 333 abuts against the upper surface of the arc plate 321, the rubber washer 334 abuts against the upper surface of the spring washer 333, and the nut 335 abuts against the rubber washer 334.
[0042] The implementation principle of the pipe joint waterstop structure for pipe jacking construction in this application embodiment is as follows: After the two sides of the first waterstop 2 are abutted against the inner peripheral walls of the two pipe sections 1, they are fixed to the inner wall of the pipe section 1 by the fixing component 3. Since the pipe section 1 will have a certain relative movement during the pipe jacking construction, the middle part of the first waterstop 2 is arched away from the pipe section 1 to accommodate the stretching amount when the two adjacent pipe sections 1 move, thereby waterproofing and reducing the possibility of the first waterstop 2 breaking during the movement, thereby further reducing the possibility of external mud and water entering the pipe section 1 through the gap.
[0043] Example 2:
[0044] Reference Figure 6The difference from Embodiment 1 is that it also includes a second waterstop 6 wrapped around the outer peripheral wall of the pipe section 1. The two sides of the second waterstop 6 abut against the outer peripheral walls of the two pipe sections 1 respectively. The second waterstop 6 is inserted into the slot 11. A third adhesive layer 61 is provided between the pipe section 1 and the second waterstop 6. The end face of the pipe section 1 is provided with a guide surface 111 that communicates with the slot 11. The middle part of the second waterstop 6 is arched in the direction close to the guide surface 111 to form a second arched part 62 to accommodate the stretching when the two adjacent pipe sections 1 move.
[0045] Example 3:
[0046] Reference Figure 7 The difference from Embodiment 1 is that one of the two adjacent arc plates 321 has a first inclined surface 7 that is inclined downward on the end face, and the other arc plate 321 has a second inclined surface 71 that abuts against the first inclined surface 7.
[0047] Example 4:
[0048] Reference Figure 8 The difference from Embodiment 3 is that the two end faces of the arc plate 321 are respectively provided with a third inclined surface 8 and a fourth inclined surface 81. The third inclined surface 8 and the fourth inclined surface 81 are symmetrically arranged along the thickness direction of the arc plate 321. The third inclined surface 8 of two adjacent arc plates 321 abuts against the fourth inclined surface 81. Due to the symmetrical arrangement, the lower ends of some third inclined surfaces 8 and fourth inclined surfaces 81 are inclined towards the arc plate 321 or towards each other. Therefore, in this embodiment, the number of arc plates 321 must be an even multiple, specifically four arc plates 321 are shown. It should be noted that the second through hole 5 on at least one arc plate 321 is a circular hole, while the second through hole 5 on the remaining arc plates 321 is an oblong hole.
[0049] The above are all preferred 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 water-stopping structure for pipe joints used in pipe jacking construction, characterized in that: It includes a first waterstop (2) that is wound around the inner peripheral wall axis of the pipe section (1) and a fixing assembly (3) for fixing the first waterstop (2) to the pipe section (1). The two sides of the first waterstop (2) abut against the inner peripheral walls of the two pipe sections (1) respectively, and the middle part of the first waterstop (2) is arched in a direction away from the pipe section (1). The fixing component (3) includes a first adhesive layer (31) disposed between the inner wall of the pipe section (1) and the first waterstop (2), a support ring (32) abutting against the surface of the first waterstop (2) away from the pipe section (1), and a fixing member (33) passing through the support ring (32) to fix it to the inner wall of the pipe section (1). There are two support rings (32) and they abut against the two sides of the first waterstop (2) respectively. The fastener (33) includes a screw (331) passing through the support ring (32), a nut (335) threaded to the screw (331), and a second adhesive layer (332) disposed outside the screw (331). The nut (335) abuts against the support ring (32). The first waterstop (2) has a first through hole (22) through which the screw (331) passes along its own thickness direction. The support ring (32) has a second through hole (5) through which the screw (331) passes along its own thickness direction. The inner wall of the pipe section (1) has an installation groove (12) for inserting the screw (331). The second adhesive layer (332) is disposed in the installation groove (12). The support ring (32) specifically includes several abutting arc-shaped plates (321), and several fasteners (33) are spaced along the axis of the arc-shaped plates (321). The two opposite surfaces of the arc-shaped plates (321) are inclined surfaces that abut each other. The second through hole (5) is provided on the arc-shaped plate (321), wherein at least one of the arc-shaped plates (321) has a round hole, and the other arc-shaped plates (321) have waist-shaped holes.
2. The water-stopping structure for pipe joints in pipe jacking construction according to claim 1, characterized in that: One of the two adjacent arc plates (321) has a first inclined surface (7) that is inclined downward on its end face, and the other arc plate (321) has a second inclined surface (71) that abuts against the first inclined surface (7).
3. The water-stopping structure for pipe joints in pipe jacking construction according to claim 1, characterized in that: The two end faces of the arc plate (321) are respectively provided with a third inclined surface (8) and a fourth inclined surface (81). The third inclined surface (8) and the fourth inclined surface (81) are symmetrically arranged along the thickness direction of the arc plate (321), and the third inclined surface (8) of two adjacent arc plates (321) abuts against the fourth inclined surface (81).
4. The water-stopping structure for pipe joints in pipe jacking construction according to claim 1, characterized in that: The two ends of the first waterstop (2) are respectively inserted into the gap between the ends of the two arc plates (321) and respectively abut against the surfaces of the two arc plates (321) away from the pipe section (1).
5. The water-stopping structure for pipe joints in pipe jacking construction according to claim 1, characterized in that: It also includes a second waterstop (6) that is wound around the outer periphery of the pipe section (1). The two sides of the second waterstop (6) abut against the outer periphery of the two pipe sections (1) respectively. The outer periphery of the pipe section (1) is provided with a slot (11) for inserting the second waterstop (6). A third adhesive layer (61) is provided between the pipe section (1) and the second waterstop (6). The pipe section (1) is provided with a fixing ring (4) that is embedded in the slot (11). The end face of the pipe section (1) is provided with a guide surface (111) that communicates with the slot (11). The middle part of the second waterstop (6) is arched towards the guide surface (111).