Waterstop structure for settlement joint and waterproof process of settlement joint

Abstract

The application provides a waterstop structure for a settlement joint and a waterproof process of the settlement joint. In the waterstop structure for the settlement joint, a flexible waterstop belt is provided with a drainage channel penetrating along the thickness direction of the waterstop belt in the area of the settlement joint; a one-way drainage connector is fixed in the drainage channel, and the one-way communication direction of the one-way drainage connector is from the lower surface of the flexible waterstop belt to the upper surface; and a flexible drainage pipe is installed at the outlet end of the one-way drainage connector and extends upward to the external drainage gutter. The waterstop structure for the settlement joint adopts a double-protection design of "waterstop + drainage", the flexible waterstop belt spans the settlement joint and can effectively block most underground water, the drainage channel arranged in the waterstop belt cooperates with the one-way drainage connector to unidirectionally guide the infiltrated underground water out, and the underground water is discharged into the drainage gutter through the flexible drainage pipe to avoid the accumulation of the underground water in the settlement joint and the infiltration of the underground water into the structure; and the one-way drainage connector can prevent the water in the drainage gutter from flowing back reversely, thereby improving the drainage reliability.

Description

Technical Field

[0001] This invention relates to the field of waterproofing / drainage construction for settlement joints, and particularly to a water-stopping structure for settlement joints and a waterproofing process for settlement joints. Background Technology

[0002] In underground structures, settlement joints are generally sealed with conventional embedded flexible waterstops for waterproofing. These waterstops rely solely on the physical sealing effect of the rubber body to block groundwater. Their waterproofing effect depends entirely on the integrity of the waterproof layer on the water-facing side and the tightness of the fit between the waterstop and the concrete structure.

[0003] However, during actual construction and subsequent operation, factors such as deviations in construction techniques, insufficient compaction of concrete during pouring, structural settlement and deformation, and stress release in the stratum can easily lead to damage, hollowing, and overlapping failure of the waterproof layer on the water-facing side. Groundwater can seep in through the damaged areas of the waterproof layer and penetrate into the structure along settlement joints. In other words, existing flexible waterstops are unreliable and ineffective in waterproofing, failing to effectively solve the problem of groundwater infiltration. This can easily lead to leakage risks in underground structures, affecting their service life and safety. Therefore, there is an urgent need for a waterstop structure and corresponding waterproofing technology that can simultaneously address both water stopping and drainage, improving the reliability of waterproofing. Summary of the Invention

[0004] The main objective of this invention is to provide a water-stopping structure and a waterproofing process for settlement joints, in order to solve the technical problems of poor reliability and inadequate waterproofing effect of existing flexible waterstops.

[0005] To achieve the above objectives, in one aspect, the present invention provides a water-stopping structure for settlement joints, comprising:

[0006] A flexible waterstop is used to span a settlement joint, wherein the flexible waterstop located in the area of ​​the settlement joint has a drainage channel extending along its own thickness.

[0007] A one-way drainage connector is fixed inside the drainage channel, and the one-way communication direction of the one-way drainage connector is that the lower surface of the flexible waterstop faces the upper surface.

[0008] A flexible drainage pipe is installed at the outlet end of the one-way drainage connector and extends upward to the external drainage ditch.

[0009] According to an embodiment of this application, the flexible waterstop has a fiber-reinforced material that extends along the length of the flexible waterstop.

[0010] According to an embodiment of this application, the connection between the one-way drainage joint and the inner wall of the drainage channel of the flexible waterstop is provided with welding adhesive.

[0011] According to an embodiment of this application, the one-way drainage connector includes a drainage connector body and a drainage fixing bolt. The drainage connector body penetrates the fixing hole and is fixed by the fixing bolt.

[0012] According to an embodiment of this application, the drainage channel includes an installation part and a water collection part, the diameter of the water collection part is larger than the diameter of the installation part, and the drainage connector body is fixed inside the installation part.

[0013] According to an embodiment of this application, the water-stopping structure for settlement joints includes a drain pipe fixing buckle for fixing a flexible drain pipe.

[0014] On the other hand, this application provides a waterproofing process for settlement joints, constructed based on the water-stopping structure for settlement joints described in any of the above claims, including:

[0015] After installing the flexible waterstop and one-way drainage joint at the bottom slab reinforcement corresponding to the preset position of the settlement joint, the first concrete pour is carried out to ensure that the flexible waterstop and one-way drainage joint are tightly bonded to the concrete structure.

[0016] The flexible drainage pipe is fixed to the one-way drainage joint, and a second concrete pour is made to fix the flexible drainage pipe in the concrete and extend the outlet end of the flexible drainage pipe into the drainage ditch.

[0017] According to an embodiment of this application, the outlet end of the drainage pipe is higher than the bottom of the tunnel drainage ditch.

[0018] According to an embodiment of this application, the flexible drainage tube has a reserved length compared to the actual extension path.

[0019] According to an embodiment of this application, the waterproofing process further includes installing a polyethylene board, polyurethane sealant, and a back-adhesive rubber waterstop at the settlement joint.

[0020] The aforementioned water-stopping structure for settlement joints adopts a dual protection design of "water-stopping + drainage". The flexible water-stopping strip spans the settlement joint, which can effectively block most of the groundwater. The drainage channel set inside, together with the one-way drainage joint, can unidirectionally guide the infiltrated groundwater and discharge it into the drainage ditch through the flexible drainage pipe to prevent groundwater from accumulating in the settlement joint and seeping into the structure. The one-way drainage joint can prevent water in the drainage ditch from flowing back, improving the reliability of drainage. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the usage state of a waterstop structure for settlement joints according to one embodiment of this application;

[0023] Figure 2 This is a schematic diagram of a water-stopping structure for settlement joints according to one embodiment of this application;

[0024] Figure 3 This is a schematic diagram of a water-stopping structure for settlement joints according to an embodiment of this application applied to a tunnel;

[0025] Figure 4 This is a side view of a flexible drainage tube according to one embodiment of this application;

[0026] Figure 5 This is a top view of a flexible drainage tube according to one embodiment of this application;

[0027] The realization of the objective, functional characteristics and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0028] 4. Back-adhesive rubber waterstop; 5. Polyethylene board; 6. Flexible waterstop; 7. Steel edge of waterstop; 8. Drainage channel; 9. Fiber reinforced material; 10. Polyurethane sealant; 11. One-way drainage joint; 12. Fixing bolt; 13. Drainage pipe fixing buckle; 14. Flexible drainage pipe; 20. Drainage ditch; 23. Joint pipe body; 24. Fixing cap. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] It should be noted that all directional indicators (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] Furthermore, in this invention, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature.

[0032] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0033] An embodiment of this application provides a water-stopping structure for settlement joints, referring to... Figure 1 , Figure 2 and Figure 3 It includes a flexible waterstop 6, a one-way drainage joint 11, and a flexible drainage pipe 14.

[0034] A flexible waterstop 6 is used to span the settlement joint. The flexible waterstop 6 has a drainage channel 8 extending along its thickness in the area of ​​the settlement joint.

[0035] The one-way drainage connector 11 is fixed inside the drainage channel 8, and the one-way communication direction of the one-way drainage connector 11 is that the lower surface of the flexible waterstop 6 faces the upper surface.

[0036] The flexible drainage pipe 14 is installed at the outlet end of the one-way drainage connector 11 and extends upward to the external drainage ditch 20.

[0037] The flexible waterstop 6, as a core component of the water-stopping structure, if made of highly elastic rubber material, has excellent sealing performance and resistance to settlement deformation. It can tightly fit the concrete structure on both sides of the settlement joint, effectively preventing groundwater from seeping along the settlement joint. The flexible waterstop 6 can be a buried drainage type waterstop.

[0038] The flexible waterstop 6 spans the entire settlement joint, and its coverage area is greater than the width of the settlement joint, ensuring that the entire settlement joint is sealed and protected. Drainage channels 8 are opened in the area of ​​the settlement joint, running through its own thickness. Multiple drainage channels 8 can be set at intervals and evenly distributed in the waterstop area corresponding to the settlement joint, so as to facilitate the rapid collection of infiltrated groundwater.

[0039] The one-way drainage joint 11 is fixed inside the drainage channel 8 and is made of corrosion-resistant, high-strength plastic or metal materials (such as stainless steel). Its one-way connection direction is designed so that the lower surface of the flexible waterstop 6 faces the upper surface, that is, groundwater is only allowed to flow from below the waterstop (water-facing side) to above (water-returning side), which can effectively prevent water in the drainage ditch 20 from flowing back into the settlement joint and avoid secondary leakage.

[0040] The flexible drainage pipe 14 is made of flexible, corrosion-resistant pipe material and is sealed to the outlet end of the one-way drainage connector 11. The connection method can be a sleeve joint with a snap-fit ​​for fixation, ensuring no leakage at the connection point. The flexible drainage pipe 14 extends upward to the external drainage ditch 20, guiding the collected groundwater into the drainage ditch 20 to achieve rapid drainage of groundwater and prevent groundwater from accumulating in the settlement joint and damaging the water-stopping structure. The flexible drainage pipe 14 is made of flexible and durable material, so its extension path can be arranged along the sidewall or floor of the tunnel structure as needed.

[0041] Conventional embedded rubber waterstops lack drainage channels, making it impossible to expel infiltrated groundwater. This causes water to accumulate inside the structure and then leak further into the tunnel surface, resulting in poor reliability, inadequate waterproofing, and an inability to effectively solve the problem of groundwater infiltration.

[0042] The water-stopping structure for settlement joints described in this application has a wide range of applications, such as settlement joints in the floor slab and sidewalls of cut-and-cover / open-cut tunnels. For example, before pouring the concrete settlement joint, a one-way drainage joint 11 and a flexible drainage pipe 14 are installed on the flexible waterstop 6 according to the tunnel structure dimensions. The flexible waterstop 6 is installed at the designated position of the settlement joint, and the flexible drainage pipe 14 is fixed to the subsequently constructed tunnel drainage ditch 20. During the seepage process of the structural settlement joint, the seepage water flows along the drainage channel 8 to the flexible drainage pipe 14, and is finally discharged into the tunnel drainage ditch 20. This greatly reduces the adverse safety and quality hazards such as leakage sealing and maintenance, water damage to the asphalt pavement layer, and slippery conditions inside the tunnel after the tunnel structure construction is completed.

[0043] When water seeps into the water-facing side of the structure, the water flows along the settlement joint to the drainage channel 8, and is freely discharged to the flexible diversion pipe 14 by the water layer pressure, and finally converges to the one-way drainage joint 11 and the diversion pipe to the drainage ditch 20 along the road.

[0044] Specific water flow direction: water seepage on the water-facing side of the structure → expansion joint → flexible waterstop 6 → one-way drainage joint 11 → flexible drainage pipe 14 → drainage ditch 20.

[0045] The above structure solves the problem of water seepage in settlement joints, the problem of water seepage into the road surface causing icing and slippery road surfaces in winter, the problem of reduced service life of asphalt, vehicle traffic safety, project quality and economic losses, and greatly satisfies the problems of water leakage prevention and treatment in the construction and application of settlement joints in existing tunnel structures.

[0046] The aforementioned water-stopping structure for settlement joints adopts a dual protection design of "water-stopping + drainage". The flexible water-stopping strip 6 spans the settlement joint and can effectively block most of the groundwater. The drainage channel 8 inside, together with the one-way drainage joint 11, can unidirectionally guide the infiltrated groundwater and discharge it into the drainage ditch 20 through the flexible drainage pipe 14 to prevent groundwater from accumulating in the settlement joint and seeping into the interior of the structure. The one-way drainage joint 11 can prevent the water in the drainage ditch 20 from flowing back, thus improving the reliability of drainage.

[0047] In some embodiments, refer to Figure 1 and Figure 2 The flexible waterstop 6 contains fiber reinforcement material 9, which extends along the length of the flexible waterstop 6.

[0048] The fiber reinforcement material 9 can be made of polyester fiber, glass fiber, or carbon fiber, and extends continuously along the length of the flexible waterstop 6, being evenly distributed within the rubber body of the waterstop. The fiber reinforcement material 9 significantly improves the tensile strength, tear strength, and creep resistance of the flexible waterstop 6, preventing it from breaking or tearing during structural settlement and deformation. It also enhances the wear resistance and durability of the waterstop, extending its service life and ensuring long-term water-stopping effectiveness.

[0049] On the other hand, considering that the center of the waterstop needs to be grooved, which reduces the transverse tear resistance and deformation performance of the waterstop, the fiber reinforcement material 9 is embedded in the matrix of the waterstop during the production process and is evenly distributed along the length of the rubber waterstop.

[0050] In some embodiments, the connection between the one-way drainage joint 11 and the inner wall of the drainage channel 8 of the flexible waterstop 6 is provided with welding adhesive.

[0051] The welding adhesive is a special waterproof welding adhesive compatible with the material of the flexible waterstop 6. It is filled into the gap between the one-way drainage joint 11 and the inner wall of the drainage channel 8. After curing at high temperature or room temperature, it forms a tight seal, ensuring that there is no risk of water leakage at the joint. The welding adhesive has good adhesion and water resistance, and also has a certain degree of elasticity, which can adapt to structural settlement deformation and prevent cracking at the joint due to settlement, further improving the sealing performance and reliability of the waterstop structure.

[0052] In some embodiments, refer to Figure 2 , Figure 4 and Figure 5 The one-way drain connector 11 includes a drain connector body and a drain fixing bolt 12. The drain connector body penetrates the fixing hole and is fixed by the fixing bolt 12.

[0053] The drain connector body has a hollow structure. One end passes through the drainage channel 8 of the flexible waterstop 6, and the other end connects to the flexible drainage pipe 14. The body has fixing holes through which the drain fixing bolts 12 pass, firmly fixing the one-way drain connector 11 to the flexible waterstop 6, preventing the one-way drain connector 11 from shifting or falling off due to water flow impact or structural settlement. The drain fixing bolts 12 are made of corrosion-resistant stainless steel and are tightened with nuts, ensuring a secure fixation that is not prone to rust, thus ensuring the long-term stable operation of the one-way drain connector 11.

[0054] In some embodiments, refer to Figure 2 , Figure 4 and Figure 5 The drainage channel 8 includes an installation part and a water collection part. The diameter of the water collection part is larger than the diameter of the installation part, and the drainage connector body is fixed inside the installation part.

[0055] The water collection part of the drainage channel 8 is located on the lower surface (water-facing side) of the flexible waterstop 6, and the installation part is located from the middle to the upper surface (water-returning side) of the drainage channel 8. The diameter of the water collection part is larger than the diameter of the installation part, forming a trumpet-shaped structure, which facilitates the rapid collection of groundwater seeping into the settlement joint, reduces the accumulation of groundwater on the surface of the waterstop, and improves drainage efficiency. The diameter of the installation part is adapted to the outer diameter of the drainage connector body, ensuring that the drainage connector body can be tightly embedded in the installation part, and sealing and fixing are achieved with welding adhesive to avoid gaps at the connection.

[0056] Accordingly, the drain connector body has a connector tube 23 and a fixing cap 24. The connector tube 23 is a hollow tube that penetrates the mounting portion, and its outer wall has external threads that mate with the fixing bolt 12. The fixing cap 24 is fixed to the end of the connector tube 23 and is located inside the water collection portion for a sealing connection.

[0057] In some specific embodiments, one of the mounting section and the water collection section is formed by an opening device.

[0058] Specialized drilling equipment must be used for the opening of the installation part to ensure that the opening size matches the drainage connector and avoid sealing failure due to opening deviation.

[0059] In some embodiments, refer to Figure 2 The water-stopping structure for the settlement joint includes a drain pipe fixing buckle 13 for fixing the flexible drain pipe 14.

[0060] In some embodiments, the drain pipe fixing buckle 13 is made of metal or high-strength plastic and can be fixed to the inner wall of the concrete structure or the reinforcing steel. Its structure is adapted to the outer diameter of the flexible drain pipe 14, which can firmly fix the flexible drain pipe 14 and prevent the drain pipe from shifting during concrete pouring or falling off or bending due to water flow impact or structural settlement during later operation. The drain pipe fixing buckles 13 are spaced out, and the spacing is reasonably set according to the length and diameter of the drain pipe to ensure that the drain pipe remains smooth throughout and does not affect the drainage effect.

[0061] In some embodiments, refer to Figure 2 The flexible waterstop 6 has a waterstop steel edge 7 on its edge.

[0062] The steel edges 7 of the waterstop are symmetrically arranged on both sides of the flexible waterstop 6 and are firmly bonded to the rubber substrate. During construction, the flexible waterstop 6 can be fixed to the steel reinforcement structure on both sides of the settlement joint through the steel edges, which improves the stability of the waterstop installation and prevents the waterstop from shifting or deflecting during concrete pouring. At the same time, the steel edges can enhance the bonding strength between the waterstop and the concrete on both sides, improve the sealing performance of the waterstop edge, reduce the risk of groundwater seeping into the gaps at the edge of the waterstop, and further improve the overall waterstop effect.

[0063] In some embodiments, refer to Figure 2 The flexible waterstop 6 has continuous protrusions along its length.

[0064] The raised portion is located in the central area of ​​the flexible waterstop 6 across the settlement joint and is continuously set along the length direction. It can adapt to the opening and compression deformation of the settlement joint. When the structure settles unevenly, the raised portion can absorb the displacement through its own elastic deformation, preventing the waterstop from being torn due to excessive deformation. At the same time, the raised portion can also increase the contact area between the waterstop and the concrete, further improving the water-stopping and sealing performance and reducing the seepage path.

[0065] Embodiments of this application also provide a waterproofing process for settlement joints, constructed based on the water-stopping structure for settlement joints described in any of the preceding claims, including:

[0066] S100: After installing the flexible waterstop 6 and the one-way drainage joint 11 at the bottom slab reinforcement corresponding to the preset position of the settlement joint, the first concrete pour is carried out to make the flexible waterstop 6 and the one-way drainage joint 11 fit tightly with the concrete structure.

[0067] S200: Fix the flexible drainage pipe 14 to the one-way drainage joint 11, and pour concrete for the second time to fix the flexible drainage pipe 14 in the concrete, and extend the outlet end of the flexible drainage pipe 14 into the drainage ditch 20.

[0068] Before construction, the pre-designed location of the settlement joint should be cleaned to remove debris and dust, ensuring that the construction surface is flat and clean.

[0069] In some embodiments, the waterstop is manufactured to a fixed length according to the tunnel cross-section dimensions to produce a centrally embedded drainage rubber waterstop that is adapted to the length of the tunnel settlement joint. The waterstop matrix has fiber reinforcement material 9 uniformly embedded in the length direction to compensate for the problem of reduced lateral tear resistance and deformation performance caused by the central groove of the waterstop. The waterstop also has a steel edge and an integrated drainage channel 8 structure.

[0070] First, precisely position and install the flexible waterstop 6 at the bottom slab reinforcement corresponding to the preset position of the settlement joint. Place the flexible waterstop 6 across the settlement joint and adjust its position to align with the settlement joint to ensure that it covers the entire area of ​​the settlement joint. Then, fix the one-way drainage joint 11 in the drainage channel 8 of the flexible waterstop 6, lock it with the drainage fixing bolt 12, and apply welding glue to the connection to ensure a tight seal.

[0071] Accordingly, the customized embedded drainage rubber waterstop is precisely installed at the designated preset position of the settlement joint of the tunnel structure to ensure the fit between the waterstop and the settlement joint, laying the foundation for subsequent concrete pouring; Drainage joint and drainage pipe assembly: The one-way drainage joint 11 and the flexible drainage pipe 14 are pre-assembled and then installed as a whole. S100: At the corresponding position of the drainage channel 8 of the rubber waterstop; During installation, waterstop welding adhesive should be added at the connection position of the one-way drainage joint 11 and the drainage channel 8 to prevent water seepage at the connection.

[0072] After the installation of the flexible waterstop 6 and the one-way drainage joint 11 is completed, the first concrete pouring is carried out. During the pouring process, the vibration speed and force need to be controlled to avoid excessive vibration that could cause the flexible waterstop 6 to shift or break. Ensure that the concrete is tightly bonded to the flexible waterstop 6 and the one-way drainage joint 11 without any voids or gaps, thus forming the first layer of waterproof protection.

[0073] After the first concrete pour has solidified, the flexible drainage pipe 14 is sealed and connected to the outlet end of the one-way drainage connector 11. The flexible drainage pipe 14 is then fixed in the preset position using the drainage pipe fixing buckle 13 to ensure that the drainage pipe is smooth and without bends. Subsequently, the second concrete pour is carried out, fixing the middle part of the flexible drainage pipe 14 in the concrete, with only the outlet end exposed. After the pour is completed, it is ensured that the concrete and the drainage pipe are tightly fitted to avoid leakage gaps. At the same time, the outlet end of the flexible drainage pipe 14 is extended to the external drainage ditch 20 to complete the construction of the drainage channel 8.

[0074] In some embodiments, the outlet end of the drainage pipe is higher than the bottom of the tunnel drainage ditch 20.

[0075] The outlet end of the flexible drainage pipe 14 is 5-10cm higher than the bottom of the tunnel drainage ditch 20. This design prevents accumulated water and silt in the drainage ditch 20 from flowing back into the drainage pipe and seeping into the settlement joint, ensuring the one-way and reliable drainage. At the same time, the outlet end being higher than the bottom of the ditch prevents silt from clogging the drainage pipe outlet, ensuring smooth drainage and preventing groundwater from accumulating in the drainage pipe and damaging the drainage pipe or the water-stop structure.

[0076] In some embodiments, the flexible drainage tube 14 has a reserved length compared to the actual extension path.

[0077] The length of the flexible drainage pipe 14 needs to be determined according to the actual distance between the waterstop and the drainage ditch 20 of the tunnel structure. During construction, an appropriate reserved length should be left to avoid subsequent structural settlement and deformation that could cause the drainage pipe to crack. At the same time, the extension path of the drainage pipe should be initially located so that it can be arranged along the side wall or bottom plate of the tunnel structure.

[0078] The reserved length of the flexible drainage pipe 14 is determined based on the estimated settlement of the underground structure, typically 5-10cm. This reserved length can accommodate the later settlement deformation of the structure, preventing the flexible drainage pipe 14 from being pulled apart or torn due to structural settlement, ensuring that the drainage pipe remains unobstructed in the long term and does not affect the drainage effect. The reserved drainage pipe can naturally coil inside the concrete without affecting structural construction and use, and also has a certain degree of elasticity, allowing it to flexibly expand and contract with structural settlement.

[0079] In some embodiments, the waterproofing process further includes installing a polyethylene board 5, a polyurethane sealant 10, and a back-adhesive rubber waterstop 4 at the settlement joint.

[0080] To further enhance the waterproofing effect of settlement joints and create multiple layers of protection, a polyethylene board 5 (such as a 20mm thick foamed polyethylene board 5), polyurethane sealant 10, and a back-adhesive rubber waterstop 4 are added at the settlement joint. The polyethylene board 5, placed within the gap of the settlement joint, has excellent anti-friction and anti-deformation properties, reducing frictional damage during structural settlement and also providing a certain degree of water barrier. The polyurethane sealant 10 fills the gap between the polyethylene board 5 and the concrete structure, forming a sealing layer after curing to prevent groundwater infiltration. The back-adhesive rubber waterstop 4 is placed on the concrete surface on the water-facing side of the settlement joint, complementing the flexible waterstop 6 to further enhance the water-stopping effect. This multi-layered protective synergy completely solves the problem of groundwater infiltration, improving the reliability and durability of the settlement joint waterproofing.

[0081] In short, the settlement joint is also equipped with auxiliary components such as foamed polyethylene board 5, polyurethane sealant 10, and back-adhesive rubber waterstop 4 at the bottom settlement joint, forming a multi-layer protection of "back-adhesive waterstop + embedded waterstop + active drainage", which further improves the seepage prevention effect.

[0082] The above waterproofing process steps are clear and can effectively drain the water seepage from the inside of the structure through the settlement joint, completely solving the problem of water accumulation and road leakage caused by conventional embedded waterstops that "only stop water but do not drain". At the same time, the construction process of this device is simple and suitable for the construction of settlement joints of reinforced concrete structures in water-rich and rainy areas under various open and underground excavation conditions.

[0083] The above technical solutions of the present invention are merely preferred embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made under the technical concept of the present invention using the contents of the present invention specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A waterproofing structure for settlement joints, characterized in that, include: A flexible waterstop strip is used to span a settlement joint, wherein the flexible waterstop strip has a drainage channel extending along its own thickness in the area of ​​the settlement joint. A one-way drainage connector is fixed inside the drainage channel, and the one-way communication direction of the one-way drainage connector is that the lower surface of the flexible waterstop is facing the upper surface. A flexible drainage pipe is installed at the outlet end of the one-way drainage connector and extends upward to the external drainage ditch.

2. The waterproofing structure for settlement joints according to claim 1, characterized in that, The flexible waterstop contains fiber-reinforced material that extends along the length of the flexible waterstop.

3. The waterproofing structure for settlement joints according to claim 1, characterized in that, The connection between the one-way drainage joint and the inner wall of the drainage channel of the flexible waterstop is provided with welding adhesive.

4. The waterproofing structure for settlement joints according to claim 1, characterized in that, The one-way drainage connector includes a drainage connector body and a drainage fixing bolt. The drainage connector body penetrates the fixing hole and is fixed by the fixing bolt.

5. The waterproofing structure for settlement joints according to claim 1, characterized in that, The drainage channel includes an installation part and a water collection part. The diameter of the water collection part is larger than the diameter of the installation part, and the drainage connector body is fixed inside the installation part.

6. The waterproofing structure for settlement joints according to any one of claims 1 to 5, characterized in that, The waterproofing structure for settlement joints includes a drain pipe fixing buckle for securing the flexible drain pipe.

7. A waterproofing process for settlement joints, characterized in that, Construction based on the water-stopping structure for settlement joints according to any one of claims 1 to 6 includes: After installing the flexible waterstop and one-way drainage joint at the bottom slab reinforcement corresponding to the preset position of the settlement joint, the first concrete pour is carried out to ensure that the flexible waterstop and one-way drainage joint are tightly bonded to the concrete structure. The flexible drainage pipe is fixed to the one-way drainage joint, and a second concrete pour is made to fix the flexible drainage pipe in the concrete and extend the outlet end of the flexible drainage pipe into the drainage ditch.

8. The waterproofing process for settlement joints according to claim 7, characterized in that, The outlet end of the drainage pipe is higher than the bottom of the tunnel drainage ditch.

9. The waterproofing process for settlement joints according to claim 7, characterized in that, The flexible drainage tube has a reserved length compared to the actual extension path.

10. The waterproofing process for settlement joints according to any one of claims 7 to 9, characterized in that, The waterproofing process also includes installing polyethylene boards, polyurethane sealant, and back-adhesive rubber waterstops at the settlement joints.

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