Tunnel inverted arch deformation joint waterproof structure

Abstract

The utility model relates to a tunnel inverted arch deformation joint waterproof structure, and relates to the technical field of tunnel construction, the deformation joint waterproof structure comprises a drainage assembly arranged in a deformation joint and used for timely draining accumulated water permeating into the deformation joint from a tunnel inner layer, and a buffer layer arranged in the deformation joint and used for buffering the acting force of water pressure on a water stop belt. The accumulated water in the tunnel inner layer permeates into the deformation joint, the buffer layer buffers the water pressure entering the deformation joint, and the accumulated water is discharged out of the tunnel through the drainage assembly under the action of gravity, so that the accumulated water amount in the deformation joint is reduced, the acting force of the accumulated water on a water stop belt in the deformation joint is reduced, and the waterproof effect of the deformation joint is improved.

Description

Technical Field

[0001] The present application relates to the technical field of tunnel construction, and in particular to a waterproof structure of a tunnel invert deformation joint. Background Art

[0002] During the construction of the tunnel invert, in order to prevent the building from deforming due to external factors, which may cause cracking or even damage to the tunnel invert, a group of deformation joints are usually set at certain intervals.

[0003] At present, the construction method of tunnel invert deformation joint is to fill the tunnel invert deformation joint with waterproof board by lining the outer wall and embed rubber waterstop in the deformation joint for water-stopping treatment, so as to prevent water leakage.

[0004] However, since water easily penetrates and accumulates in the soil layer at the top of the tunnel, the water outside the tunnel acts on the change-over joint, causing the water pressure to be concentrated on the waterstop. Long-term use can easily cause the waterstop to be damaged due to pressure, thereby reducing the waterproof effect of the deformation joint. Utility Model Content

[0005] In order to improve the waterproof effect of deformation joints, the present application provides a tunnel invert deformation joint waterproof structure.

[0006] The tunnel invert deformation joint waterproof structure provided in this application adopts the following technical solution:

[0007] The tunnel invert deformation joint waterproof structure comprises a drainage component which is arranged in the deformation joint and timely discharges the accumulated water which penetrates into the deformation joint from the inner layer of the tunnel, and a buffer layer which is arranged in the deformation joint and is used to buffer the force of water pressure on the water stop belt.

[0008] By adopting the above technical scheme, the accumulated water in the inner layer of the tunnel penetrates into the deformation joint, and the buffer layer buffers the water pressure entering the deformation joint. The accumulated water is discharged from the tunnel through the drainage component under the action of gravity, thereby reducing the amount of water accumulated in the deformation joint, reducing the force of the accumulated water on the waterstop strip in the deformation joint, and improving the waterproof effect of the deformation joint.

[0009] Furthermore, the drainage assembly comprises:

[0010] A water guide channel, which is arranged on the side of the deformation joint close to the inner layer of the tunnel, and is used to guide the accumulated water that penetrates into the deformation joint from the inner layer of the tunnel;

[0011] A drainage pipe is arranged on one side of the inner layer of the tunnel along the axial direction of the tunnel and is used to discharge the internal accumulated water in time. The water guide channel is connected to the drainage pipe and is used to discharge the accumulated water in the water guide channel into the drainage pipe.

[0012] By adopting the above technical solution, the water diversion channel timely diverts the accumulated water entering the deformation joint on one side of the inner layer of the tunnel, and finally discharges it through the drainage pipe, thereby reducing the amount of water accumulated in the deformation joint and further reducing the force of the accumulated water on the waterstop strip in the deformation joint.

[0013] Furthermore, the water-guiding channel is composed of a caulking layer and an isolation layer. The caulking layer is arranged on the side of the deformation joint close to the inner layer of the tunnel and is used to support the inner layer of the tunnel and allow accumulated water to pass through. The isolation layer is arranged in the deformation joint and isolates the caulking layer from the buffer layer and allows accumulated water to flow in the caulking layer.

[0014] By adopting the above technical scheme, the accumulated water in the inner layer of the tunnel enters the caulking layer. Through the isolation of the isolation layer, the buffer layer provides buffering support for the isolation layer. The accumulated water flows downward along the caulking layer under the action of gravity and is finally discharged from the tunnel through the drainage pipe, thereby reducing the amount of water accumulated in the deformation joint.

[0015] Furthermore, the water guiding channel is connected to the drainage pipe through a water guiding pipe, and the connection between the water guiding pipe and the water guiding channel is higher than the drainage pipe. The water guiding pipe is used to guide the accumulated water in the water guiding channel into the drainage pipe and prevent the accumulated water in the drainage pipe from flowing back to the water guiding channel.

[0016] By adopting the above technical solution, the water guide pipe is fixedly installed on one side of the bottom of the caulking layer, so that the accumulated water in the caulking layer flows into the water guide pipe under the action of gravity, and the other side of the water guide pipe is fixedly installed on the top of the drain pipe, so that the accumulated water in the water guide pipe is discharged into the drain pipe. The height of the connection between the water guide pipe and the caulking layer is higher than the height of the connection with the drain pipe, so as to prevent the accumulated water in the drain pipe from flowing back into the caulking layer through the water guide pipe.

[0017] Furthermore, the buffer layer is arranged in the deformation joint and abuts against the side of the isolation layer away from the caulking layer, and the buffer layer is composed of asphalt wood fiber board.

[0018] By adopting the above technical solution, the buffer layer composed of asphalt wood fiber boards can provide better support for the isolation layer, and can also assist the isolation layer in isolating accumulated water.

[0019] Furthermore, a buried rubber waterstop is provided in the deformation joint for blocking water that penetrates into the deformation joint, and a deformable bending portion is provided in the middle of the deformation joint.

[0020] By adopting the above technical solution, the embedded rubber waterstop is fixedly installed in the tunnel wall. When the deformation joint is deformed, the deformation of the deformation joint is responded to by the deformable bending part, thereby ensuring the waterproof effect of the deformation joint.

[0021] Furthermore, steel bar clips are arranged on both sides of the embedded rubber waterstop, and the steel bar clips are arranged in the tunnel wall and lock the position of the embedded rubber waterstop.

[0022] By adopting the above technical solution, the steel bar clips on both sides of the embedded rubber waterstop are fixedly installed in the tunnel wall on both sides of the deformation joint. The tunnel wall locks the position of the embedded rubber waterstop through the steel bar clips, thereby improving the fixing effect of the wall on the embedded rubber waterstop.

[0023] Furthermore, a blocking component is provided on the deformation joint to prevent the accumulated water from penetrating from the tunnel invert into the deformation joint, and the blocking component includes:

[0024] A back-sticking water stop, which is arranged on the tunnel invert and is used to prevent accumulated water from penetrating into the deformation joint;

[0025] The waterproofing coiled material is arranged on the tunnel invert and presses against the side of the back waterstop away from the tunnel invert. The waterproofing coiled material is used to prevent the accumulated water in the tunnel invert from penetrating to the back waterstop.

[0026] By adopting the above technical solution, the accumulated water in the tunnel invert is initially blocked by the waterproof membrane, and then blocked again by the back waterstop, thereby reducing the probability of the accumulated water in the tunnel invert penetrating into the deformation joint. At the same time, the waterproof membrane presses the back waterstop against the tunnel.

[0027] In summary, the present application includes at least one of the following beneficial technical effects:

[0028] The accumulated water in the inner layer of the tunnel penetrates into the caulking layer, the isolation layer blocks the accumulated water, and the buffer layer supports the isolation layer. Under the action of gravity, the accumulated water is discharged into the drainage pipe through the water guide pipe and discharged from the tunnel through the drainage pipe. At the same time, the waterproof membrane and the back-sticked waterstop work together to reduce the probability of the accumulated water in the tunnel invert penetrating into the deformation joint, thereby reducing the amount of water accumulated in the deformation joint, reducing the force of the accumulated water on the waterstop in the deformation joint, and improving the waterproof effect of the deformation joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic diagram of the tunnel structure of the present application;

[0030] Figure 2 yes Figure 1 Schematic diagram of the cross section of AA;

[0031] Figure 3 yes Figure 1 Schematic cross-section of the middle BB;

[0032] Figure 4 yes Figure 3 Enlarged schematic diagram of part C in the middle.

[0033] Figure numerals: 1. Tunnel wall; 11. Tunnel inner layer; 12. Tunnel invert; 13. Expansion joint; 2. Drainage assembly; 21. Water guide channel; 211. Caulking layer; 212. Isolation layer; 22. Drainage pipe; 23. Water guide pipe; 3. Buffer layer; 4. Embedded rubber waterstop; 41. Steel bar clip; 42. Bending part; 5. Blocking assembly; 51. Back-attached waterstop; 52. Waterproof membrane. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-4 This application is described in further detail.

[0035] The embodiments of the present application disclose a waterproof structure for a tunnel invert deformation joint.

[0036] Reference Figure 1 and Figure 2 The tunnel invert deformation joint waterproof structure includes a drainage component 2 which is arranged in the deformation joint 13 and timely discharges the accumulated water which penetrates into the deformation joint 13 from the tunnel inner layer 11, and a buffer layer 3 which is arranged in the deformation joint 13 and is used to buffer the force of water pressure on the water stop belt.

[0037] Reference Figure 2 and Figure 3 The interior of the tunnel is an arched structure, the deformation joint 13 is an annular joint structure with the tunnel axis as the center, the drainage component 2 includes a water guide channel 21 and a drainage pipe 22, the water guide channel 21 is arranged on the side of the deformation joint 13 close to the tunnel inner layer 11, and the water guide channel 21 is used to guide the accumulated water that penetrates into the deformation joint 13 from the tunnel inner layer 11; the water guide channel 21 is composed of a caulking layer 211 and an isolation layer 212, the caulking layer 211 is arranged on the side of the deformation joint 13 close to the soil layer, the caulking layer 211 is used to support the tunnel inner layer 11, the caulking layer 211 has a gap for water to pass through, and the caulking layer 211 is filled with a caulking material; the isolation layer 212 passes through the deformation joint 13 and is fixedly installed in the tunnel wall 1 on both side walls of the deformation joint 13, the isolation layer 212 waterproofs and isolates the caulking layer 211 and the buffer layer 3, so as to prevent the accumulated water in the caulking layer 211 from entering the buffer layer 3; the isolation layer 212 of this embodiment is isolation paper.

[0038] Reference Figure 2 and Figure 3The drainage pipe 22 is installed on one side of the tunnel inner layer 11 along the tunnel axis direction. The drainage pipe 22 is used to discharge the accumulated water in the tunnel inner layer 11 in time; the water guide channel 21 is connected with the drainage pipe 22 through the water guide pipe 23, so that the accumulated water in the caulking layer 211 is discharged into the drainage pipe 22 in time, thereby reducing the accumulated water content in the caulking layer 211; the water guide pipe 23 is fixedly installed on one side of the bottom of the caulking layer 211, so that the accumulated water in the caulking layer 211 flows into the water guide pipe 23 under the action of gravity, and the other side of the water guide pipe 23 is fixedly installed on the top of the drainage pipe 22, so that the accumulated water in the water guide pipe 23 is discharged into the drainage pipe 22. In order to prevent the accumulated water in the drainage pipe 22 from flowing back into the caulking layer 211 through the water guide pipe 23, the height of the connection between the water guide pipe 23 and the caulking layer 211 is higher than the height of the connection with the drainage pipe 22.

[0039] Reference Figure 2 and Figure 4 The buffer layer 3 is fixedly installed in the deformation joint 13. The buffer layer 3 abuts against the side of the isolation layer 212 away from the caulking layer 211. The buffer layer 3 is used to buffer the deformation of the deformation joint 13. At the same time, the buffer layer 3 provides buffering support for the isolation layer 212, thereby reducing the force of water pressure on the water stop strip. The buffer layer 3 of this embodiment is composed of asphalt wood fiber board.

[0040] Reference Figure 4 In order to reduce the probability of water infiltration and accumulation in the deformation joint 13, an embedded rubber waterstop 4 is provided in the deformation joint 13 to block the water infiltration into the deformation joint 13. Steel bar clips 41 are fixedly installed on both sides of the embedded rubber waterstop 4. The steel bar clips 41 are fixedly installed in the tunnel wall 1. The tunnel wall 1 locks the position of the embedded rubber waterstop 4 through the steel bar clips 41; in order to cope with the deformation of the deformation joint 13, the embedded rubber waterstop 4 is provided with a deformable bending portion 42 at the middle position of the deformation joint 13. When the deformation joint 13 is deformed, the deformation of the deformation joint 13 is coped with by the deformable bending portion 42, thereby ensuring the waterproof effect of the deformation joint 13.

[0041] Reference Figure 3 and Figure 4 In order to prevent the accumulated water on the tunnel invert 12 from penetrating into the deformation joint 13, a blocking component 5 is arranged on the tunnel invert 12, and the blocking component 5 includes a back-attached waterstop 51 and a waterproof membrane 52. The back-attached waterstop 51 is fixedly installed on the tunnel invert 12, and the back-attached waterstop 51 is used to prevent the accumulated water from penetrating into the deformation joint 13. The buffer layer 3 in the deformation joint 13 supports the back-attached waterstop 51; the waterproof membrane 52 is fixedly installed on the tunnel invert 12, and the waterproof membrane 52 presses the side of the back-attached waterstop 51 away from the tunnel invert 12, and the waterproof membrane 52 is used to prevent the accumulated water in the tunnel invert 12 from penetrating into the back-attached waterstop 51.

[0042] The working principle of the embodiment of the present application is as follows:

[0043] The accumulated water in the inner layer 11 of the tunnel penetrates into the caulking layer 211, the isolation layer 212 blocks the accumulated water, and the buffer layer 3 supports the isolation layer 212. Under the action of gravity, the accumulated water is discharged into the drain pipe 22 through the water pipe 23 and discharged from the tunnel through the drain pipe 22. At the same time, the waterproof membrane 52 and the back-attached waterstop 51 work together to reduce the probability of the accumulated water in the tunnel invert 12 penetrating into the deformation joint 13, thereby reducing the amount of water accumulated in the deformation joint 13, reducing the force of the accumulated water on the waterstop in the deformation joint 13, and improving the waterproof effect of the deformation joint 13.

[0044] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. The waterproof structure of tunnel invert deformation joint is characterized by: It comprises a drainage component (2) arranged in a deformation joint (13) and used to timely discharge water that has penetrated into the deformation joint (13) from the inner layer (11) of the tunnel, and a buffer layer (3) arranged in the deformation joint (13) and used to buffer the force of water pressure on the water stop belt.

2. The tunnel invert deformation joint waterproof structure according to claim 1, characterized in that: The drainage component (2) comprises: A water guide channel (21), the water guide channel (21) being arranged on a side of the deformation joint (13) close to the tunnel inner layer (11), the water guide channel (21) being used to guide the accumulated water that penetrates from the tunnel inner layer (11) into the deformation joint (13); A drainage pipe (22), the drainage pipe (22) being arranged on one side of the tunnel inner layer (11) along the tunnel axis direction and used to timely drain the accumulated water inside, the water guide channel (21) being in communication with the drainage pipe (22) and used to drain the accumulated water in the water guide channel (21) into the drainage pipe (22).

3. The tunnel invert deformation joint waterproof structure according to claim 2 is characterized by: The water-conducting channel (21) is composed of a caulking layer (211) and an isolation layer (212); the caulking layer (211) is arranged on a side of the deformation joint (13) close to the tunnel inner layer (11) and is used to support the tunnel inner layer (11) and allow accumulated water to pass through; the isolation layer (212) is arranged in the deformation joint (13) and isolates the caulking layer (211) from the buffer layer (3) and allows accumulated water to flow in the caulking layer (211).

4. The tunnel invert deformation joint waterproof structure according to claim 2, characterized in that: The water guide channel (21) is connected to the drainage pipe (22) via a water guide pipe (23); the connection between the water guide pipe (23) and the water guide channel (21) is higher than the drainage pipe (22); the water guide pipe (23) is used to guide the accumulated water in the water guide channel (21) into the drainage pipe (22) and prevent the accumulated water in the drainage pipe (22) from flowing back to the water guide channel (21).

5. The tunnel invert deformation joint waterproof structure according to claim 3 is characterized by: The buffer layer (3) is arranged in the deformation joint (13) and abuts against a side of the isolation layer (212) away from the caulking layer (211); the buffer layer (3) is made of asphalt wood fiber board.

6. The tunnel invert deformation joint waterproof structure according to claim 1, characterized in that: The deformation joint (13) is provided with a buried rubber waterstop (4) for blocking water that penetrates into the deformation joint (13), and the buried rubber waterstop (4) is provided with a deformable bending portion (42) at the middle of the deformation joint (13).

7. The tunnel invert deformation joint waterproof structure according to claim 6, characterized in that: Steel bar clips (41) are provided on both sides of the embedded rubber water stop strip (4); the steel bar clips (41) are arranged in the tunnel wall (1) and lock the position of the embedded rubber water stop strip (4).

8. The tunnel invert deformation joint waterproof structure according to claim 1, characterized in that: The deformation joint (13) is provided with a blocking component (5) for blocking accumulated water from penetrating from the tunnel invert (12) into the deformation joint (13), and the blocking component (5) comprises: A back-attached water stop strip (51), the back-attached water stop strip (51) being arranged on the tunnel invert (12) and used to prevent accumulated water from penetrating into the deformation joint (13); A waterproofing coiled material (52) is arranged on the tunnel invert (12) and presses against a side of the back-attached waterstop strip (51) away from the tunnel invert (12). The waterproofing coiled material (52) is used to prevent water accumulated in the tunnel invert (12) from penetrating onto the back-attached waterstop strip (51).

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