Waterproof structure adopting waterproof self-repairing technology for tunnel preposed structure

Abstract

The utility model belongs to the technical field of tunnel construction, and particularly relates to a waterproof structure of a tunnel preposed structure waterproof self-repairing technology. Comprising a support, an automatic repairing layer and secondary lining concrete, the automatic repairing layer comprises self-repairing sprayed concrete and a self-repairing coating, and the support, the self-repairing sprayed concrete, the self-repairing coating and the secondary lining concrete are sequentially distributed from outside to inside. By arranging the self-repairing shotcrete and the self-repairing coating, damage to the self-repairing shotcrete caused by the moisture absorption effect, the capillary effect, the chemical erosion effect, the permeation effect and the freezing and thawing effect can be reduced, cracks and capillary pores can be automatically repaired in the later period, and the durability of the self-repairing shotcrete is remarkably improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of tunnel construction, and particularly relates to a waterproof structure with self-healing technology for a tunnel prefabricated structure. Background Art

[0002] During the waterproof construction of a tunnel, the traditional waterproof structure of the spray-anchor tunneling (mining method) includes support, primary lining, shotcrete, drain pipe, waterproof board, and secondary lining.

[0003] However, the tunnel groundwater is rich in impurities, and the drain pipe is prone to siltation and blockage, resulting in the failure of the tunnel waterproofing. At the same time, during the construction of the waterproof board, the melting point of the materials used in the welding process is relatively high, inevitably damaging the waterproof board, and the mechanical welding quality cannot meet the sealing requirements, easily resulting in water seepage. In addition, the waterproof board cannot be firmly bonded to the concrete, and when the concrete hardens and shrinks, a gap will be formed between the concrete and the waterproof board. When the waterproof layer is locally damaged, the seepage water will flow between the concrete and the waterproof board, forming a "water string" phenomenon; moreover, it is very difficult to repair the waterproof board, which has an adverse impact on the later anti-seepage work. Therefore, it is necessary to design a waterproof structure with self-healing technology for a tunnel prefabricated structure to solve the above problems. Summary of the Utility Model

[0004] In view of the above problems, the utility model provides a waterproof structure with self-healing technology for a tunnel prefabricated structure to solve the problems raised in the above background art.

[0005] To achieve the above object, the utility model provides the following technical solution: A waterproof structure with self-healing technology for a tunnel prefabricated structure, including support, an automatic repair layer, and secondary lining concrete. The automatic repair layer includes self-healing shotcrete and self-healing coating, and the support, the self-healing shotcrete, the self-healing coating, and the secondary lining concrete are distributed in sequence from outside to inside.

[0006] Further, the automatic repair layer includes a first water absorption layer and a second water absorption layer. The first water absorption layer is arranged between the support and the self-healing shotcrete, and the second water absorption layer is arranged at the bottom of the self-healing coating.

[0007] Further, the waterproof structure with self-healing technology for a tunnel prefabricated structure further includes a drain pipe. The axial direction of the drain pipe faces the radial direction of the tunnel. A first water inlet is provided on the drain pipe opposite to the first water absorption layer, a second water inlet is provided on the drain pipe opposite to the second water absorption layer, and a drain outlet is provided on the side of the drain pipe away from the support.

[0008] Furthermore, the waterproof structure of the tunnel pre - installation structure waterproof self - repair technology further includes a water storage tank. The water storage tank is arranged on the side of the drain pipe away from the support, and the water storage tank is communicated with the drain outlet.

[0009] Furthermore, the drain pipe is slidably connected to the support, the first water - absorbing layer, the self - repairing shotcrete, the self - repairing coating, the second water - absorbing layer, and the secondary lining concrete. First extrusion blocks and second extrusion blocks are arranged on the outer side of the drain pipe. The first extrusion block is located between the first water - absorbing layer and the self - repairing shotcrete, and the second extrusion block is located between the second water - absorbing layer and the secondary lining concrete.

[0010] Furthermore, the self - repairing shotcrete is shotcrete internally mixed with reactive silica - based self - repairing waterproofing agent or cement - based penetrating crystalline waterproofing agent. The self - repairing coating is cement - based penetrating crystalline waterproofing coating or reactive silica - based self - repairing coating. The self - repairing shotcrete can also be internally mixed with reactive silica - based self - repairing waterproofing agent or cement - based penetrating crystalline waterproofing agent.

[0011] The technical effects and advantages of the present utility model are as follows:

[0012] 1. By setting the self - repairing shotcrete and the self - repairing coating, the damage to the self - repairing shotcrete caused by moisture absorption, capillary action, chemical erosion, penetration, and freeze - thaw action can be reduced, and cracks and capillary pores can be automatically repaired in the later stage, significantly increasing the durability of the self - repairing shotcrete.

[0013] Other features and advantages of the present utility model will be described in the subsequent description, and some of them will become obvious from the description or be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained through the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following - described drawings are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0015] Figure 1 Shows the structural schematic diagram of the waterproof structure of the tunnel pre - installation structure waterproof self - repair technology in the embodiment of the present utility model;

[0016] Figure 2 Shows the structural schematic diagram of the automatic repair layer in the embodiment of the present utility model.

[0017] Reference numerals: 1, support; 2, automatic repair layer; 21, self-repairing shotcrete; 22, self-repairing coating; 23, first water absorption layer; 24, second water absorption layer; 3, secondary lining concrete; 4, drain pipe; 5, water storage tank; 61, first extrusion block; 62, second extrusion block. Detailed implementation manners

[0018] In order to make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0019] As Figure 1 shown, a waterproof structure of a tunnel pre-posed structure waterproof self-repairing technology according to an embodiment of the present utility model includes a support 1, an automatic repair layer 2 and a secondary lining concrete 3. The automatic repair layer 2 includes a self-repairing shotcrete 21 and a self-repairing coating 22. The support 1, the self-repairing shotcrete 21, the self-repairing coating 22 and the secondary lining concrete 3 are distributed in sequence from outside to inside.

[0020] In this embodiment, by canceling the primary lining and shotcrete in the waterproof structure of the traditional spray anchor and drift (mining method), it is optimized to the self-repairing shotcrete 21; and by canceling the drain pipe 4 and the waterproof board in the waterproof structure of the traditional spray anchor and drift (mining method), it is optimized to the self-repairing coating 22. Among them, the self-repairing shotcrete 21 and the self-repairing coating 22 are used as a pure rigid waterproof system for the tunnel. Compared with the waterproof structure of the traditional spray anchor and drift (mining method), the self-repairing shotcrete has the ability to self-repair leakage, can block capillary pores, can greatly reduce the cracks on the self-repairing shotcrete, and improves the impermeability and crack resistance. Thus, by setting the self-repairing shotcrete 21 and the self-repairing coating 22, the damage to the self-repairing shotcrete caused by hygroscopic action, capillary action, chemical erosion action, penetration action and freeze-thaw action can be reduced, and the cracks and capillary pores can be automatically repaired later, significantly increasing the durability of the self-repairing shotcrete.

[0021] At the same time, by setting the self-repairing shotcrete 21 and the self-repairing coating 22, the waterproof structure and the concrete structure become an integral whole, that is, only by setting the self-repairing shotcrete 21 and the self-repairing coating 22, the waterproof structure and the concrete structure can be set at the same time, making the construction process of the tunnel waterproof project more convenient and fast.

[0022] Optionally, the automatic repair layer 2 includes a first water-absorbing layer 23 and a second water-absorbing layer 24. The first water-absorbing layer 23 is disposed between the support 1 and the self-repairing shotcrete 21, and the second water-absorbing layer 24 is disposed at the bottom of the self-repairing coating 22.

[0023] Specifically, the first water-absorbing layer 23 and the second water-absorbing layer 24 can be made of water-absorbing fibers or water-absorbing resins.

[0024] In this embodiment, by providing the first water-absorbing layer 23 between the support 1 and the self-repairing shotcrete 21, the first water-absorbing layer 23 can absorb the water between the support 1 and the self-repairing shotcrete 21. At the same time, by providing the second water-absorbing layer 24 at the bottom of the self-repairing coating 22, the second water-absorbing layer 24 can absorb the water between the self-repairing coating 22 and the second water-absorbing layer 24. Thereby, the damage of water to the self-repairing shotcrete 21 and the self-repairing coating 22 can be reduced, and the durability of the self-repairing shotcrete and the self-repairing coating 22 is improved.

[0025] Optionally, the waterproof structure of the tunnel pre-constructed waterproof self-repairing technology further includes a drain pipe 4. The axial direction of the drain pipe 4 faces the radial direction of the tunnel. A first water inlet is provided on the drain pipe 4 corresponding to the first water-absorbing layer 23, a second water inlet is provided on the drain pipe 4 corresponding to the second water-absorbing layer 24, and a drain outlet is provided on the side of the drain pipe 4 away from the support 1.

[0026] Specifically, the drain pipe 4 is located in the middle of the tunnel.

[0027] In this embodiment, by providing the drain pipe 4 and providing the first water inlet and the second water inlet on the drain pipe 4, and corresponding the first water inlet to the first water-absorbing layer 23, the water absorbed by the first water-absorbing layer 23 can enter the drain pipe 4 through the first water inlet and be discharged through the drain outlet. At the same time, by corresponding the second water inlet to the second water-absorbing layer 24, the water absorbed by the second water-absorbing layer 24 can enter the drain pipe 4 through the second water inlet and be discharged through the drain outlet. Thereby, the water in the waterproof structure of the tunnel pre-constructed waterproof self-repairing technology can be further reduced, and the structural strength of the waterproof structure of the tunnel pre-constructed waterproof self-repairing technology is improved.

[0028] Optionally, the waterproof structure of the tunnel pre-constructed waterproof self-repairing technology further includes a water storage tank 5. The water storage tank 5 is provided on the side of the drain pipe 4 away from the support 1, and the water storage tank 5 is communicated with the drain outlet.

[0029] In this embodiment, by providing a water storage tank 5 on the drain pipe 4, the water in the drain pipe 4 can be concentrated in the water storage tank 5, which helps prevent the water in the drain pipe 4 from seeping back into the waterproof structure of the pre-tunnel structure waterproof self-repair technology after flowing out of the drain pipe 4, and improves the structural strength of the waterproof structure of the pre-tunnel structure waterproof self-repair technology.

[0030] Optionally, the drain pipe 4 is slidably connected to the support 1, the first water absorption layer 23, the self-repairing shotcrete 21, the self-repairing coating 22, the second water absorption layer 24, and the secondary lining concrete 3. First extrusion blocks 61 and second extrusion blocks 62 are provided on the outer side of the drain pipe 4. The first extrusion block 61 is located between the first water absorption layer 23 and the self-repairing shotcrete 21, and the second extrusion block 62 is located between the second water absorption layer 24 and the secondary lining concrete 3. The self-repairing shotcrete 21 is shotcrete internally mixed with an active silica-based self-repairing waterproofing agent or a cementitious capillary crystalline waterproofing agent. The self-repairing coating 22 is a cementitious capillary crystalline waterproofing coating or an active silica-based self-repairing coating. The self-repairing shotcrete 21 can also be internally mixed with an active silica-based self-repairing waterproofing agent or a cementitious capillary crystalline waterproofing agent.

[0031] In this embodiment, by providing the first extrusion blocks 61 and the second extrusion blocks 62 to push the drain pipe 4 to move in the radial direction of the tunnel, the first extrusion block 61 can be used to squeeze the first water absorption layer 23, so that the water in the first water absorption layer 23 enters the drain pipe 4 through the first water inlet, and the second extrusion block 62 can be used to squeeze the second water absorption layer 24, so that the water in the second water absorption layer 24 enters the drain pipe 4 through the second water inlet. Thus, it is convenient to squeeze out the water in the first water absorption layer 23 and the second water absorption layer 24, which helps reduce the water in the waterproof structure of the pre-tunnel structure waterproof self-repair technology and improves the structural strength of the waterproof structure of the pre-tunnel structure waterproof self-repair technology.

[0032] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A waterproof structure with waterproof self-repairing technology for tunnel front structure, characterized in that: The invention comprises a support (1), a self-repairing layer (2) and a secondary lining concrete (3), wherein the self-repairing layer (2) comprises self-repairing sprayed concrete (21) and a self-repairing coating (22), and the support (1), the self-repairing sprayed concrete (21), the self-repairing coating (22) and the secondary lining concrete (3) are sequentially distributed from the outside to the inside.

2. The waterproof structure of the tunnel front structure waterproof self-repairing technology according to claim 1 is characterized in that: The self-repairing layer (2) further comprises a first water-absorbing layer (23) and a second water-absorbing layer (24), wherein the first water-absorbing layer (23) is arranged between the support (1) and the self-repairing shotcrete (21), and the second water-absorbing layer (24) is arranged at the bottom of the self-repairing coating (22).

3. The waterproof structure of the tunnel front structure waterproof self-repairing technology according to claim 2 is characterized in that: It also comprises a drainage pipe (4), wherein the axial direction of the drainage pipe (4) faces the radial direction of the tunnel, the drainage pipe (4) is provided with a first water inlet relative to the first water absorbing layer (23), the drainage pipe (4) is provided with a second water inlet relative to the second water absorbing layer (24), and the drainage pipe (4) is provided with a drainage outlet on a side away from the support (1).

4. The waterproof structure of the tunnel front structure waterproof self-repairing technology according to claim 3 is characterized in that: A water storage tank (5) is provided on the side of the drainage pipe (4) away from the support (1), and the water storage tank (5) is connected to the drainage port.

5. The waterproof structure of the tunnel front structure waterproof self-repairing technology according to claim 4 is characterized in that: The drainage pipe (4) is slidably connected to the support (1), the first water absorbing layer (23), the self-repairing sprayed concrete (21), the self-repairing coating (22), the second water absorbing layer (24) and the second lining concrete (3); a first extrusion block (61) and a second extrusion block (62) are arranged on the outside of the drainage pipe (4); the first extrusion block (61) is located between the first water absorbing layer (23) and the self-repairing sprayed concrete (21), and the second extrusion block (62) is located between the second water absorbing layer (24) and the second lining concrete (3).

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