Waterproof structure and construction technology of expansion joint

Abstract

The present invention provides a waterproof structure and construction process for an expansion joint. The waterproof structure of the expansion joint includes: an outer waterproof structure, the outer waterproof structure is attached to the position of the expansion joint on the outer surface of the tunnel and fixed by a fixing member; an inner filling structure, the inner filling structure is filled into the expansion joint, wherein the inner filling structure is a polyethylene foam plastic board; an internal water-stopping structure, the internal water-stopping structure is arranged in the inner filling structure; a drainage component, one end of which is arranged in the expansion joint to drain the water in the expansion joint. The present invention ensures that the waterproofness of the expansion joint is improved by adding multiple waterproof structures, thereby reducing the penetration of water such as rainwater. On the basis of the above, the present application also adds a drainage component. When the above multiple waterproof structures fail, the drainage component can timely discharge the water in the expansion joint, thereby reducing the impact.

Description

Technical Field

[0001] The invention relates to the technical field of tunnel expansion joint waterproofing, and in particular to a waterproofing structure and construction process of an expansion joint. Background Art

[0002] It is very easy for underground tunnels in cities to leak, especially at expansion joints. Long-term leakage not only affects driving comfort and safety, but also has a great impact on the durability of the structure.

[0003] In the actual construction of super-long tunnels, the tunnels are constructed in stages, often with a gap of several years. The connection between the new and old tunnels at the expansion joint has always been a weak link. At present, external waterproof membranes are mostly used for connection. As the waterproof membrane ages with the increase of service life, water seepage occurs frequently at this location. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art.

[0005] To this end, a first aspect of the present invention provides a waterproof structure for an expansion joint.

[0006] A second aspect of the present invention provides a construction process for a waterproof structure of an expansion joint.

[0007] The present invention provides a waterproof structure for an expansion joint, comprising:

[0008] An outer waterproof structure, which is attached to the location of the expansion joint on the outer surface of the tunnel and is fixed by a fixing piece;

[0009] An inner filling structure, the inner filling structure fills the expansion joint, wherein the inner filling structure is a polyethylene foam plastic board;

[0010] An internal water-stopping structure, the internal water-stopping structure is arranged on the inner filling structure, wherein the internal water-stopping structure is located near the expansion joint at the inner surface of the tunnel, wherein the internal water-stopping structure is a water-stopping strip;

[0011] A drainage component has one end disposed in the expansion joint to drain water in the expansion joint.

[0012] The waterproof structure of the expansion joint proposed by the present invention includes an outer waterproof structure, an inner filling structure, an internal water-stopping structure and a drainage component. Among them, the outer waterproof structure is used to prevent water from entering the expansion joint. As the first waterproof structure, it ensures the waterproofness of the expansion joint. In order to avoid the outer waterproof structure from falling off, it is fixed by a fixing member, abandoning the traditional bonding method in the prior art to avoid the outer waterproof structure from falling off. The inner filling structure is the second waterproof structure, which has good buffering, heat resistance, stable chemical properties, is not easily corroded, and can reduce the infiltration of water. In order to further improve the waterproofness of the expansion joint, the technical solution adds an internal water-stopping structure in the expansion joint. The internal water-stopping structure is a water-stopping strip, which is distributed in the expansion seal. When the water penetrates into the expansion joint, the water-stopping strip stops it in time to prevent it from further penetrating into the tunnel, thereby improving the waterproofness of the tunnel expansion joint. It can be seen that the present application ensures the improvement of the waterproofness of the expansion joint by adding multiple waterproof structures, thereby reducing the infiltration of water such as rainwater. On the basis of the above, the present application also adds a drainage component. When the above-mentioned multiple waterproof structures fail, the drainage component can discharge the water in the expansion joint in time, thereby reducing the impact.

[0013] The waterproof structure of the expansion joint according to the above technical solution of the present invention may also have the following additional technical features:

[0014] In the above technical solution, the outer waterproof structure includes:

[0015] The water stop is attached to the position of the expansion joint on the outer surface of the tunnel and is fixed by the fixing piece, and the gap between the water stop and the expansion joint is sealed by waterproof glue.

[0016] In this technical solution, the outer waterproof structure is a water stop. The water stop is made of rubber, which has a certain puncture resistance and slows down the speed of aging and falling off. No protective layer is required during the backfilling process, which reduces the construction process. In addition, the water stop is fixed by a fixing piece, which can ensure its stability and avoid falling off under stress.

[0017] In the above technical solution, the fixing member is a fixing screw, and the fixing screw fixes the water stop strip to the position where the expansion joint is located on the outer surface of the tunnel.

[0018] In the technical solution, the fixing member is a fixing bolt structure, which is convenient for disassembly and installation.

[0019] In the above technical solution, the waterstop strips are water-expandable waterstop strips, and are divided into multiple groups and arranged at positions near the expansion joints on the inner surface of the tunnel.

[0020] In the present technical solution, the water stop strip adopts a water-expandable water stop strip, and its model and specification are not specifically limited, and those skilled in the art can purchase it commercially. When the water stop strip encounters water flow, it expands to block the water flow path, thereby preventing further penetration of the water flow.

[0021] In the above technical solution, the inner filling structure is sealed by waterproof glue at the position where the expansion joint is located on the inner surface of the tunnel.

[0022] In the present technical solution, the waterproof glue is used to further seal the gap between the inner filling structure and the expansion joint, thereby improving the waterproof performance.

[0023] In the above technical solution, the drainage component includes:

[0024] A positioning steel bar is arranged on one side of the expansion joint;

[0025] A drainage pipe is connected to the positioning steel bars, and an end portion of the drainage pipe is located in the expansion joint.

[0026] In this technical solution, the drainage assembly is composed of positioning steel bars and drainage pipes. The positioning steel bars are used to fix the drainage pipes, which are pre-buried and extend to the drainage ditch of the tunnel, so as to drain the water in the expansion joint immediately.

[0027] In the above technical solution, the other end of the drain pipe is connected to the drain ditch to guide the water in the expansion joint into the drain ditch.

[0028] In the present technical solution, the drainage ditch is used to receive drainage from the expansion joint and guide it to a designated location.

[0029] The present invention also provides a construction process for a waterproof structure of an expansion joint, comprising the following steps:

[0030] Install the external water stop and fix it with fixing parts;

[0031] Seal the gap between the two with two-component polysulfide waterproof glue;

[0032] Use polyethylene foam sheets to fill gaps;

[0033] Pre-buried drainage pipe in the middle of the expansion joint;

[0034] Install expansion waterstops in expansion joints;

[0035] Use two-component polysulfide waterproof glue again to seal the missed gaps.

[0036] Additional aspects and advantages of the present invention will become apparent from the following description or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0038] Figure 1 is a cross-sectional view of the waterproof structure of the expansion joint of the present invention;

[0039] Figure 2 is a schematic diagram of a drain pipe in the waterproof structure of the expansion joint of the present invention;

[0040] Figure 3 It is a structural diagram of a drainage pipe in the waterproof structure of the expansion joint of the present invention.

[0041] in, Figures 1 to 3 The corresponding relationship between the reference numerals and the component names is as follows:

[0042] 1. Expansion joint; 2. Outer waterproof structure; 3. Inner filling structure; 4. Internal water-stop structure; 5. Drainage assembly; 501. Positioning steel bars; 502. Drainage pipe; 6. Fixing parts. DETAILED DESCRIPTION

[0043] In order to more clearly understand the above-mentioned purpose, features and advantages of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0045] Refer to the following Figures 1 to 3 The waterproof structure and construction process of the expansion joint provided according to some embodiments of the present invention are described.

[0046] Some embodiments of the present application provide a waterproof structure for an expansion joint.

[0047] like Figures 1 to 3 As shown, the first embodiment of the present invention provides a waterproof structure for an expansion joint, comprising:

[0048] An outer waterproof structure 2, the outer waterproof structure 2 is attached to the position of the expansion joint 1 on the outer surface of the tunnel and is fixed by a fixing member 6;

[0049] An inner filling structure 3, the inner filling structure 3 is filled into the expansion joint 1, wherein the inner filling structure 3 is a polyethylene foam plastic board;

[0050] An internal water-stopping structure 4, wherein the internal water-stopping structure 4 is arranged on the inner filling structure 3, wherein the internal water-stopping structure 4 is located near the expansion joint 1 on the inner surface of the tunnel, wherein the internal water-stopping structure 4 is a water-stopping strip;

[0051] One end of the drainage component 5 is disposed in the expansion joint 1 to drain the water in the expansion joint 1 .

[0052] The waterproof structure of the expansion joint 1 proposed by the present invention includes an outer waterproof structure 2, an inner filling structure 3, an internal water-stopping structure 4 and a drainage component 5. Among them, the outer waterproof structure 2 is used to prevent water from entering the expansion joint 1. As the first waterproof structure, it ensures the waterproofness of the expansion joint 1. In order to avoid the outer waterproof structure 2 from falling off, it is fixed by a fixing member 6, abandoning the traditional bonding method in the prior art to avoid the outer waterproof structure 2 from falling off. The inner filling structure 3 is the second waterproof structure, which has good buffering, heat resistance, stable chemical properties, is not easily corroded, and can reduce the infiltration of water. In order to further improve the waterproofness of the expansion joint 1, the technical solution adds an internal water-stopping structure 4 in the expansion joint 1. The internal water-stopping structure 4 is a water-stopping strip, which is distributed in the expansion joint. When the water penetrates into the expansion joint 1, the water-stopping strip stops it in time to prevent it from further penetrating into the tunnel, thereby improving the waterproofness of the tunnel expansion joint 1. It can be seen that the present application ensures the improvement of the waterproofness of the expansion joint 1 by adding multiple waterproof structures, thereby reducing the penetration of water such as rainwater. On the basis of the above, the present application also adds a drainage component 5. When the above multiple waterproof structures fail, the drainage component 5 can timely discharge the water in the expansion joint 1, thereby reducing the impact.

[0053] The second embodiment of the present invention provides a waterproof structure for an expansion joint, and based on the first embodiment, the outer waterproof structure 2 includes:

[0054] The water stop is attached to the position of the expansion joint 1 on the outer surface of the tunnel and is fixed by the fixing member 6, and the gap between the water stop and the expansion joint 1 is sealed by waterproof glue.

[0055] In this embodiment, the outer waterproof structure 2 is a water stop. The water stop is made of rubber, which has a certain puncture resistance and slows down the speed of aging and falling off. No protective layer is required during the backfilling process, which reduces the construction process. In addition, the water stop is fixed by a fixing member 6, which can ensure its stability and avoid falling off under stress.

[0056] The third embodiment of the present invention proposes a waterproof structure for an expansion joint, and based on any of the above embodiments, the fixing member 6 is a fixing screw, which fixes the waterstop strip to the position of the expansion joint 1 on the outer surface of the tunnel.

[0057] In this embodiment, the fixing member 6 is a fixing bolt structure, which is convenient for disassembly and installation.

[0058] The fourth embodiment of the present invention proposes a waterproof structure for an expansion joint, and based on any of the above embodiments, the waterstop strips are water-swellable waterstop strips, and are divided into multiple groups and arranged near the expansion joint 1 on the inner surface of the tunnel.

[0059] In this embodiment, the water stop strip adopts a water-expandable water stop strip, and its model and specification are not specifically limited, and those skilled in the art can purchase it commercially. When the water stop strip encounters water flow, it expands to block the water flow path, thereby preventing further penetration of the water flow.

[0060] A fifth embodiment of the present invention provides a waterproof structure for an expansion joint, and based on any of the above embodiments, the inner filling structure 3 is sealed by a waterproof glue at the position where the expansion joint 1 is located on the inner surface of the tunnel.

[0061] In this embodiment, the waterproof glue is used to further seal the gap between the inner filling structure 3 and the expansion joint 1, thereby improving the waterproof performance.

[0062] The sixth embodiment of the present invention provides a waterproof structure of an expansion joint, and based on any of the above embodiments, the drainage component 5 includes:

[0063] A positioning steel bar 501 is arranged on one side of the expansion joint 1;

[0064] The drainage pipe 502 is connected to the positioning steel bar 501 , and the end portion is located in the expansion joint 1 .

[0065] In this embodiment, the drainage assembly 5 is composed of positioning steel bars 501 and a drainage pipe 502. The positioning steel bars 501 are used to fix the drainage pipe 502, which is pre-buried in advance and extends to the drainage ditch of the tunnel, so as to drain the water in the expansion joint 1 immediately.

[0066] The seventh embodiment of the present invention proposes a waterproof structure for an expansion joint, and based on any of the above embodiments, the other end of the drain pipe 502 is connected to a drainage ditch to guide the water in the expansion joint 1 into the drainage ditch.

[0067] In this embodiment, the drainage ditch is used to receive drainage from the expansion joint 1 and guide it to a designated location.

[0068] The eighth embodiment of the present invention provides a construction process of a waterproof structure of an expansion joint, comprising the following steps:

[0069] Install the external water stop and fix it with fixing parts;

[0070] Seal the gap between the two with two-component polysulfide waterproof glue;

[0071] Use polyethylene foam sheets to fill gaps;

[0072] Pre-buried drainage pipe in the middle of the expansion joint;

[0073] Install expansion waterstops in expansion joints;

[0074] Use two-component polysulfide waterproof glue again to seal the missed gaps.

[0075] In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0076] Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A waterproof structure for an expansion joint, characterized in that: include: An outer waterproof structure (2), the outer waterproof structure (2) being attached to the location of the expansion joint (1) on the outer surface of the tunnel and being fixed by a fixing member (6); The outer waterproof structure (2) comprises: A water stop is attached to the expansion joint (1) at a position on the outer surface of the tunnel and is fixed by the fixing member (6), and the gap between the water stop and the expansion joint (1) is sealed by a waterproof glue; An inner filling structure (3), the inner filling structure (3) filling the expansion joint (1), wherein the inner filling structure (3) is a polyethylene foam plastic board; An internal water-stopping structure (4), the internal water-stopping structure (4) being arranged on the inner filling structure (3), wherein the internal water-stopping structure (4) is located near the expansion joint (1) on the inner surface of the tunnel, and wherein the internal water-stopping structure (4) is a water-stopping strip; A drainage component (5), one end of which is arranged in the expansion joint (1) to drain water in the expansion joint (1); The fixing member (6) is a fixing screw, and the fixing screw fixes the water stop strip to the position of the expansion joint (1) located on the outer surface of the tunnel; The inner filling structure (3) is sealed by waterproof glue at the location where the expansion joint (1) is located on the inner surface of the tunnel; The drainage component (5) comprises: A positioning steel bar (501) is arranged on one side of the expansion joint (1); A drainage pipe (502), connected to the positioning steel bar (501), with an end portion located in the expansion joint (1); The other end of the drainage pipe (502) is connected to a drainage ditch so as to guide the water in the expansion joint (1) into the drainage ditch.

2. The waterproof structure of the expansion joint according to claim 1, characterized in that: The water stop strips are water-expandable water stop strips and are divided into multiple groups and arranged at positions close to the expansion joints (1) on the inner surface of the tunnel.

3. The construction process of the waterproof structure of the expansion joint according to any one of claims 1 to 2, characterized in that: The steps include: Install the external water stop and fix it with fixing parts; Seal the gap between the two with two-component polysulfide waterproof glue; Use polyethylene foam sheets to fill gaps; Pre-buried drainage pipe in the middle of the expansion joint; Install expansion waterstops in expansion joints; Use two-component polysulfide waterproof glue again to seal the missed gaps.

Images