A waterproof structure of a socket joint of an assembled comprehensive pipe gallery
By adopting a multi-layer sealing structure and pre-reserved grouting holes at the joints of prefabricated pipe racks, the problems of low construction efficiency and poor waterproofing effect in existing technologies are solved, achieving highly efficient waterproofing and long-life joint sealing, and providing a convenient leakage maintenance solution.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 赣州建工集团有限公司
- Filing Date
- 2025-08-04
- Publication Date
- 2026-07-21
AI Technical Summary
Existing prefabricated pipe gallery joint waterproof structures have shortcomings in terms of construction efficiency and waterproofing effect. In particular, the waterproof strips are easily damaged and difficult to repair, and are prone to water seepage problems when there is uneven settlement.
It adopts a multi-layer sealing structure, including a sealing plate, sealing gasket, sealing strip and reserved grouting holes, combined with reactive self-adhesive waterproof membrane, to form a triple sealing measure to ensure the sealing and convenience of the interface.
It improves construction efficiency, enhances waterproofing and water-stopping effects, extends service life, provides convenient leakage maintenance methods, and reduces maintenance costs.
Smart Images
Figure CN224531759U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of building waterproofing construction technology, and in particular to a waterproof structure for a prefabricated integrated pipe gallery socket joint. Background Technology
[0002] Urban integrated utility tunnels effectively address many shortcomings in urban underground infrastructure construction, gaining widespread recognition in China and already showing initial signs of development. Their construction primarily employs cast-in-place and prefabrication methods. Compared to cast-in-place construction, prefabrication offers controllable quality, lower overall costs, wider applicability, economic and environmental benefits, shorter construction cycles, and minimal disruption to road traffic. Depending on the project size, prefabrication can be performed as a whole or in sections for on-site assembly, offering flexibility and representing the mainstream trend in future engineering construction.
[0003] Existing waterproofing methods for prefabricated pipe gallery joints generally employ two approaches: pre-cast strips or post-tensioned prestressed concrete combined with waterproof adhesive strips. The former requires pre-cast reinforcement in the precast components, followed by on-site reinforcement tying, formwork erection, concrete pouring, and curing, resulting in complex and inefficient construction procedures. While the latter is more convenient, the waterproof adhesive strips used are prone to deformation or even tearing under uneven settlement of the pipe gallery foundation due to complex construction conditions and underground environments, making it difficult to meet the requirement of a 100-year service life. Furthermore, both methods permanently seal the rubber waterstop inside the joint, making replacement impossible once damaged, and repairs extremely difficult. If conventional waterproof membranes are used in the reinforced areas of the spigot and socket joints, and there is a lack of effective adhesion between the grout layer and the membrane, water seepage problems are highly likely. Utility Model Content
[0004] The purpose of this utility model is to provide a waterproof structure for prefabricated integrated pipe gallery socket joints to solve the problems existing in the prior art. It has good waterproof and water-stopping effects, long service life, and convenient installation.
[0005] To achieve the above objectives, this utility model provides the following solution:
[0006] This utility model provides a waterproof structure for a prefabricated integrated pipe gallery socket joint, including a socket joint sealing structure, a waterproof layer at the socket joint, and a reserved grouting hole. The socket joint sealing structure includes a first sealing plate waterstop, a first sealing gasket waterstop layer, a second sealing gasket waterstop layer, and a second sealing plate waterstop, which are sequentially arranged within the socket joint. The first sealing plate waterstop is located at one end on the outside of the socket joint, and the second sealing plate waterstop is located at one end on the inside of the socket joint. The reserved grouting hole communicates with the socket joint between the first sealing gasket waterstop layer and the second sealing gasket waterstop layer. The waterproof layer at the socket joint is located outside the first sealing plate waterstop.
[0007] In one embodiment, the joint sealing structure further includes a first sealing strip and a second sealing strip disposed within the joint. The first sealing strip is adjacent to the first sealing gasket waterstop layer and located on the side of the first sealing gasket waterstop layer away from the first sealing plate waterstop. The second sealing strip is adjacent to the second sealing gasket waterstop layer and located on the side of the second sealing gasket waterstop layer away from the second sealing plate waterstop.
[0008] In one embodiment, sealant is provided at both ends of the socket joint.
[0009] In one embodiment, the waterproof layer at the joint includes a main waterproof layer and a waterproof reinforcement layer, wherein the waterproof reinforcement layer is located inside the main waterproof layer.
[0010] In one embodiment, the main waterproof layer and the waterproof reinforcement layer are reactive self-adhesive waterproof membranes.
[0011] In one embodiment, the main waterproof layer and the waterproof reinforcement layer are polyvinyl chloride waterproof membrane or thermoplastic polyolefin waterproof membrane.
[0012] In one embodiment, the second sealing plate waterstop is a high-polyethylene foam filling plate or a EPDM rubber sealing plate.
[0013] In one embodiment, the first sealing plate waterstop is a porous comb-shaped waterproof rubber gasket or a EPDM rubber sealing plate.
[0014] In one embodiment, the first sealing strip and the second sealing strip are water-swellable waterproof strips or silicone sealing strips.
[0015] The present invention achieves the following technical advantages over the prior art:
[0016] This utility model adopts an interface form that integrates sealing plates and sealing gaskets (first sealing plate waterstop, first sealing gasket waterstop layer, second sealing gasket waterstop layer, and second sealing plate waterstop) at the end face of the socket-type interface of the pipe gallery. It is easy to install and does not require complicated steel bar binding, formwork, and pouring processes, which greatly improves construction efficiency. It also has good waterproof and water-stopping effects. By setting up reserved grouting holes, polyurethane grouting material (or epoxy resin) can be directly injected for leak repair in the later stage without dismantling the pipe gallery structure. This opens up an efficient and convenient treatment channel for later leakage maintenance, thereby significantly improving the overall waterproof performance and long service life of the prefabricated pipe gallery. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a cross-sectional schematic diagram of the waterproof structure of the prefabricated integrated pipe gallery socket joint in Embodiment 1 of this utility model;
[0019] Figure 2 This is a cross-sectional schematic diagram of the waterproof structure of the prefabricated integrated pipe gallery socket joint in Embodiment 2 of this utility model.
[0020] In the diagram: 1-Precast concrete pipe section, 2-Pre-reserved grouting hole, 3-Sealant, 4-Second sealing plate waterstop, 5-Second sealing gasket waterstop layer, 6-First sealing gasket waterstop layer, 7-First sealing plate waterstop, 9-Waterproof reinforcement layer, 10-Main waterproof layer, 11-Second sealing strip, 12-First sealing strip, 13-Grouting and concrete protective layer. Detailed Implementation
[0021] 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.
[0022] The purpose of this utility model is to provide a waterproof structure for prefabricated integrated pipe gallery socket joints to solve the problems existing in the prior art. It has good waterproof and water-stopping effects, long service life, and convenient installation.
[0023] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.
[0024] Example 1
[0025] like Figure 1As shown, this embodiment provides a prefabricated integrated utility tunnel socket joint waterproof structure, specifically a socket joint waterproof structure for the side wall of an integrated utility tunnel, including a socket joint sealing structure, a waterproof layer at the socket joint, and a reserved grouting hole 2. The socket joint sealing structure includes a first sealing plate waterstop 7, a first sealing gasket waterstop layer 6, a second sealing gasket waterstop layer 5, and a second sealing plate waterstop 4, which are sequentially arranged in the socket joint. The first sealing plate waterstop 7 is located at one end outside the socket joint, and the second sealing plate waterstop 4 is located at one end inside the socket joint. The reserved grouting hole 2 is connected to the socket joint between the first sealing gasket waterstop layer 6 and the second sealing gasket waterstop layer 5. The waterproof layer at the socket joint is located outside the first sealing plate waterstop 7.
[0026] In this embodiment, sealant 3 is provided at both ends of the socket joint.
[0027] In this embodiment, the waterproof layer at the joint includes a main waterproof layer 10 and a waterproof reinforcement layer 9, with the waterproof reinforcement layer 9 located inside the main waterproof layer 10.
[0028] In this embodiment, the main waterproof layer 10 and the waterproof reinforcement layer 9 are reactive self-adhesive waterproof membranes. In other embodiments, the main waterproof layer 10 and the waterproof reinforcement layer 9 can also be made of polyvinyl chloride waterproof membranes or thermoplastic polyolefin waterproof membranes, which have good waterproof performance and water-resistant properties. Using reactive self-adhesive waterproof membranes can effectively prevent water seepage at the joints, significantly improving waterproof safety.
[0029] In this embodiment, the second sealing plate waterstop 4 is a high-polymer polyethylene foam filling board. However, it is not limited to high-polymer polyethylene foam filling board; for example, EPDM rubber sealing boards or other materials with good sealing performance and elasticity can also be used.
[0030] In this embodiment, the first sealing plate waterstop 7 is a porous comb-type waterproof rubber gasket. However, it is not limited to porous comb-type waterproof rubber gaskets; materials with good sealing performance and elasticity, such as EPDM rubber sealing plates, can also be used. The porous comb-type waterproof rubber gasket, with its compression rebound characteristics, blocks water seepage through contact stress generated at the contact surface and allows for a certain degree of displacement and angular deformation, ensuring excellent water tightness at the interface. This measure not only ensures the deformation adaptability of the joint and reduces the risk of leakage due to tensile cracking of the expansion ring, but also effectively addresses the challenges of uneven settlement adaptability and seismic performance in soft soil areas and earthquake-prone areas. The expansion ring refers to a ring-shaped structure formed around the joint at the socket joint of adjacent pipe gallery segments, capable of expanding or rotating with structural deformation (such as temperature changes, uneven foundation settlement, seismic vibration, etc.). It is not an independent physical component, but rather a "deformation adaptation system" jointly formed by the sealing structure at the joint (such as the porous comb-type waterproof rubber gasket) and the connection relationship between the pipe gallery segments, similar to the expansion joints in above-ground buildings. Its core function is to adapt to the deformation requirements of the utility tunnel structure, preventing cracks at the joints due to excessive stretching or compression, thereby reducing the risk of leakage. Specifically, in soft soil areas, earthquake-prone areas, or environments with large temperature variations, utility tunnels are prone to longitudinal expansion and contraction, lateral displacement, or angular deformation due to foundation settlement, vibration, or thermal expansion and contraction. The expansion ring absorbs these displacements through its own deformation capacity, preventing damage to the sealing structure at the joint (such as waterproof strips and gaskets) due to excessive stress, while also preventing cracks in the main structure of the utility tunnel due to rigid constraints, ultimately maintaining the water tightness and structural safety of the joints.
[0031] During construction, the first sealing plate waterstop 7, the first sealing gasket waterstop layer 6, the second sealing gasket waterstop layer 5, and the second sealing plate waterstop 4 are sequentially installed at the joint of the cross section of the precast concrete pipe section 1. The first sealing plate waterstop 7 and the second sealing plate waterstop 4 are temporarily fixed with double-sided tape. The positions of the first sealing gasket waterstop layer 6 and the second sealing gasket waterstop layer 5 are checked and firmly fixed to prevent displacement during tightening. In addition, the pre-reserved grouting hole 2 is checked to ensure it is unobstructed to prevent blockage from affecting subsequent observation and grouting. After the preparatory work is completed, the precast pipe section is tightened to the design position. After checking that it meets the design requirements, the sealant 3 is applied.
[0032] After the joint sealing treatment is completed, the waterproof reinforcement layer 9 is applied to the outside of the side wall using the wet-laying method, and then the main waterproof layer 10 is applied to the surface using the wet-laying method. Note that cement slurry should not contaminate the back of the waterproof reinforcement layer 9 and the bonding area of the main waterproof layer 10 to ensure the overlap between the rolls. After the waterproof layer construction is completed, a protective layer is set to prevent the rolls from being scratched during backfilling, so as to facilitate the sealing and protection of the joints.
[0033] Example 2
[0034] like Figure 2 As shown, this embodiment provides a prefabricated integrated utility tunnel socket joint waterproof structure, specifically a socket joint waterproof structure for the base plate of the integrated utility tunnel. The difference from Embodiment 1 is that, in this embodiment, the socket joint sealing structure further includes a first sealing strip 12 and a second sealing strip 11 disposed within the socket joint. The first sealing strip 12 is adjacent to the first sealing gasket waterstop layer 6 and located on the side of the first sealing gasket waterstop layer 6 away from the first sealing plate waterstop 7. The second sealing strip 11 is adjacent to the second sealing gasket waterstop layer 5 and located on the side of the second sealing gasket waterstop layer 5 away from the second sealing plate waterstop 4.
[0035] In this embodiment, the first sealing strip 12 and the second sealing strip 11 are water-swellable waterproofing strips. However, they are not limited to water-swellable waterproofing strips; other materials that can meet the sealing and waterproofing requirements, such as silicone sealing strips, can also be used.
[0036] When sealing and waterproofing the joints of the base slab, after the concrete subbase is completed and the waterproofing conditions are met, first lay the main waterproofing layer 10 on the large surface, then construct the waterproofing reinforcement layer 9, and finally construct the grouting and concrete protective layer 13 and lift the precast pipe section to the designated position to prepare for the precast pipe section to be tightened.
[0037] Before tightening the precast pipe section, the following layers should be installed sequentially at the joint of the precast concrete pipe section 1: the first sealing plate waterstop 7, the first sealing gasket waterstop layer 6, the first sealing strip 12, the second sealing strip 11, and the second sealing gasket waterstop layer 5. The first sealing plate waterstop 7 is temporarily fixed with double-sided tape. The positions of the first and second sealing gasket waterstop layers 6 and 5 are checked and securely fixed to prevent misalignment during tightening. Additionally, the pre-reserved grouting holes 2 are checked for unobstructed flow to prevent blockage from affecting subsequent observation and grouting. After the preparatory work is completed, the precast pipe section is tightened to the designed position. After confirming that it meets the design requirements, the second sealing plate waterstop 4 is embedded inside the precast pipe section and tamped down. After solidification, the groove is cleaned, and finally, sealant 3 is applied for sealing.
[0038] This embodiment implements multiple optimizations for the sealing and waterproofing of the socket joints of prefabricated integrated pipe corridors. It adopts a triple sealing measure combining double sealing plates, double sealing gaskets, and double sealing strips, and adds reserved grouting holes, which not only significantly improves the sealing performance, but also opens up an efficient and convenient channel for subsequent leakage maintenance.
[0039] This utility model adopts an interface form that integrates sealing plates, sealing gaskets, and sealing strips at both ends of the pipe gallery socket interface, which is convenient to install and does not require complicated steel bar binding, formwork, pouring and other processes, thus greatly improving construction efficiency.
[0040] This invention employs a triple sealing measure combining double sealing plates, double sealing gaskets, and double sealing strips, and adds pre-reserved grouting holes. The porous comb-shaped waterproof rubber sealing gasket, with its compression and rebound characteristics, uses contact stress generated at the contact surface to prevent water penetration, while allowing for a certain degree of displacement and angular deformation. This ensures excellent water-tightness at the interface, reduces the risk of leakage due to deformation, and meets long-term use requirements.
[0041] This utility model is equipped with a reserved grouting hole, which allows for the direct injection of polyurethane grouting material (or epoxy resin) to repair leaks in the later stages without dismantling the pipe gallery structure, thus greatly reducing maintenance costs. In addition, the grouting hole adopts a one-way valve structure to prevent backflow after grouting.
[0042] If conventional waterproof membrane is used at the joint reinforcement area, and there is a lack of effective adhesion between the mortar layer and the membrane, water seepage is very likely to occur. This utility model uses a reactive self-adhesive waterproof membrane, which can effectively prevent water seepage at the joint area and significantly improve waterproofing safety.
[0043] This invention significantly improves both the overall waterproofing performance and the long service life of prefabricated pipe racks.
[0044] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.
Claims
1. A waterproof structure for a prefabricated integrated pipe gallery socket joint, characterized in that: The device includes a joint sealing structure, a waterproof layer at the joint, and a pre-reserved grouting hole. The joint sealing structure comprises a first sealing plate waterstop, a first sealing gasket waterstop, a second sealing gasket waterstop, and a second sealing plate waterstop, sequentially disposed within the joint. The first sealing plate waterstop is located at one end outside the joint, and the second sealing plate waterstop is located at one end inside the joint. The pre-reserved grouting hole communicates with the joint between the first and second sealing gasket waterstops. The waterproof layer at the joint is disposed outside the first sealing plate waterstop.
2. The waterproof structure for the prefabricated integrated pipe gallery socket joint according to claim 1, characterized in that: The joint sealing structure further includes a first sealing strip and a second sealing strip disposed within the joint. The first sealing strip is adjacent to the first sealing gasket waterstop layer and is located on the side of the first sealing gasket waterstop layer away from the first sealing plate waterstop. The second sealing strip is adjacent to the second sealing gasket waterstop layer and is located on the side of the second sealing gasket waterstop layer away from the second sealing plate waterstop.
3. The waterproof structure for the prefabricated integrated pipe gallery socket joint according to claim 1, characterized in that: Sealant is applied to both ends of the socket joint.
4. The waterproof structure for the prefabricated integrated pipe gallery socket joint according to claim 1, characterized in that: The waterproof layer at the joint includes a main waterproof layer and a waterproof reinforcement layer, with the waterproof reinforcement layer located inside the main waterproof layer.
5. The waterproof structure for the prefabricated integrated pipe gallery socket joint according to claim 4, characterized in that: The main waterproof layer and the waterproof reinforcement layer are reactive self-adhesive waterproof membranes.
6. The waterproof structure for the prefabricated integrated pipe gallery socket joint according to claim 4, characterized in that: The main waterproof layer and the waterproof reinforcement layer are made of polyvinyl chloride waterproof membrane or thermoplastic polyolefin waterproof membrane.
7. The waterproof structure for the prefabricated integrated pipe gallery socket joint according to claim 1, characterized in that: The second sealing plate waterstop is a high-polyethylene foam filling board or a EPDM rubber sealing board.
8. The waterproof structure for the prefabricated integrated pipe gallery socket joint according to claim 1, characterized in that: The first sealing plate waterstop is a porous comb-shaped waterproof rubber gasket or a EPDM rubber sealing plate.
9. The waterproof structure for the prefabricated integrated pipe gallery socket joint according to claim 2, characterized in that: The first and second sealing strips are water-swellable waterproof strips or silicone sealing strips.