Waterproof and drainage system provided with heat preservation plate at anti-freezing fortification section of tunnel

Abstract

The utility model discloses a tunnel anti-freezing fortification section provided with an insulation board waterproof and drainage system which comprises a drainage blind pipe installed on the inner side of a primary support, the drainage blind pipe is annularly arranged along a tunnel, and the end of the drainage blind pipe extends to the bottom of the tunnel and is connected with a drainage channel at the bottom of the tunnel. The geotechnical cloth, the outer side waterproof plate, the polyurethane heat preservation plate, the inner side waterproof plate and the secondary lining are sequentially arranged on the inner side of the drainage blind pipe. The utility model has the advantages that the structure is simple, and the installation is convenient; drainage is conducted through the drainage blind pipe, waterproof heat preservation is conducted through the outer side waterproof plate, the polyurethane heat preservation plate and the inner side waterproof plate, and drainage, waterproof and heat preservation of the tunnel in the severe cold area are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnels, in particular to a thermal insulation board waterproof and drainage system for a frost-resistant section of a tunnel. Background Art

[0002] During the operation of tunnels in severe cold regions, thermal insulation is usually required to prevent the low temperature from damaging the tunnel drainage system, that is, a thermal insulation layer needs to be arranged between the initial support of the arch wall and the secondary lining. The existing tunnel thermal insulation structures usually adopt ordinary thermal insulation boards. However, this kind of ordinary thermal insulation board is relatively heavy and has high laying construction requirements, making its construction difficult and the construction efficiency low. The existing ordinary thermal insulation board has a large thermal conductivity and poor adiabatic and thermal insulation performance, which cannot meet the thermal insulation requirements of tunnels in severe cold regions, and its waterproof and drainage performance is also poor. Therefore, the traditional thermal insulation board has poor thermal insulation performance in severe cold regions and cannot meet the thermal insulation requirements during the actual operation of tunnels, and tunnel structures will have diseases, seriously affecting the operation of tunnels.

[0003] Therefore, a thermal insulation board waterproof and drainage system for a frost-resistant section of a tunnel that can solve the above problems is needed. Summary of the Invention

[0004] The purpose of the utility model is to provide a thermal insulation board waterproof and drainage system for a frost-resistant section of a tunnel according to the deficiencies of the above-mentioned existing technologies. Drainage is carried out through a drainage blind pipe, and waterproof and thermal insulation are achieved by using an outer waterproof board, a polyurethane thermal insulation board and an inner waterproof board, realizing drainage, waterproof and thermal insulation of tunnels in severe cold regions.

[0005] The purpose of the utility model is achieved by the following technical solutions:

[0006] A thermal insulation board waterproof and drainage system for a frost-resistant section of a tunnel, characterized in that: it includes a drainage blind pipe installed on the inner side of the initial support, the drainage blind pipe is arranged along the circumferential direction of the tunnel, the end of the drainage blind pipe extends to the bottom of the tunnel and is connected to the drainage channel at the bottom of the tunnel, and a geotextile, an outer waterproof board, a polyurethane thermal insulation board, an inner waterproof board and a secondary lining are sequentially arranged on the inner side of the drainage blind pipe.

[0007] The outer waterproof board, the polyurethane thermal insulation board and the inner waterproof board are connected by an I-shaped thermal insulation board fixture. The thermal insulation board fixture includes two wing plates and a web. The two wing plates are respectively connected to the outer waterproof board and the inner waterproof board, and a thermal insulation board insertion joint is formed between the web and the two wing plates for installing the polyurethane thermal insulation board.

[0008] The included angle between the wing plate and the web is 70° to 85°.

[0009] The gap between the inserted joint of the thermal insulation board and the polyurethane thermal insulation board is filled with polysulfide sealant.

[0010] The wing plates are provided with hot-melt gaskets, and the two wing plates are respectively welded to the outer waterproof board and the inner waterproof board by electromagnetic welding.

[0011] The advantages of the present utility model are: simple structure and convenient installation; drainage is carried out through the drainage blind pipe, and waterproof and thermal insulation are realized by using the outer waterproof board, polyurethane thermal insulation board and inner waterproof board, achieving drainage, waterproof and thermal insulation of the tunnel in cold regions. Brief Description of the Drawings

[0012] Figure 1 It is the cross-sectional layout diagram of the drainage and waterproof system of the present utility model;

[0013] Figure 2 is Figure 1 the enlarged view of A in

[0014] Figure 3 is Figure 2 the sectional view of I-I in

[0015] Figure 4 It is the structural schematic diagram of the thermal insulation board fixture of the present utility model. Detailed Description of the Preferred Embodiment

[0016] The features of the present utility model and other related features will be further described in detail below with reference to the accompanying drawings through embodiments for the understanding of those skilled in the same industry:

[0017] As Figures 1 to 4 shown, the marks in the figure are respectively represented as:

[0018] Initial support 1, drainage blind pipe 2, geotextile 3, outer waterproof board 4, polyurethane thermal insulation board 5, inner waterproof board 6, secondary lining 7, thermal insulation board fixture 8, wing plate 9, web 10, inserted joint of thermal insulation board 11, drainage channel 12.

[0019] Embodiment: As Figures 1 to 4 shown, this embodiment relates to a drainage and waterproof system with thermal insulation boards in the frost-resistant section of a tunnel, which mainly includes an initial support 1, a drainage blind pipe 2, a geotextile 3, an outer waterproof board 4, a polyurethane thermal insulation board 5, an inner waterproof board 6 and a secondary lining 7 arranged in sequence from outside to inside. The drainage blind pipe 2 is arranged along the circumferential direction of the tunnel, and the end of the drainage blind pipe 2 extends to the bottom of the tunnel and is connected to the drainage channel 12 at the bottom of the tunnel. Seepage water can flow from the drainage blind pipe 2 into the drainage channel 12, realizing the drainage of the tunnel.

[0020] As Figures 1 to 4As shown in the figure, the outer waterproof board 4, the polyurethane insulation board 5 and the inner waterproof board 6 are connected by an I-shaped insulation board fixture 8. The setting of the insulation board fixture 8 not only facilitates the installation of the polyurethane insulation board 5, but also can connect the outer waterproof board 4, the polyurethane insulation board 5 and the inner waterproof board 6 together. In this embodiment, the insulation board fixtures 8 are arranged at intervals both in the circumferential direction and the line direction of the tunnel, which is convenient for the arrangement of the polyurethane insulation board 5; the polyurethane insulation board 5 is a 5 cm thick rigid polyurethane foam plastic board.

[0021] As Figures 1 to 4 shown in the figure, the insulation board fixture 8 includes two wing plates 9 and one web 10. The two wing plates 9 are respectively electromagnetic welded to the outer waterproof board 4 and the inner waterproof board 6. In this embodiment, heat-melt gaskets are provided on the wing plates 9, which is beneficial to electromagnetic welding to protect the outer waterproof board 4 and the inner waterproof board 6. A insulation board insertion joint 11 is formed between the web 10 and the two wing plates 9 for installing the polyurethane insulation board 5. In this embodiment, the included angle α between the wing plate 9 and the web 10 is 70° to 80°, which ensures that the polyurethane insulation board 5 is inserted into the insulation board insertion joint 11, and the forces are exerted on each other, making it not easy to loosen. In addition, polysulfide sealant is filled in the gap between the insulation board insertion joint 11 and the polyurethane insulation board 5 to strengthen the connection between the insulation board fixture 8 and the polyurethane insulation board 5. Moreover, the gap between adjacent polyurethane insulation boards 5 is also filled with polysulfide sealant to ensure the connection between the polyurethane insulation boards 5.

[0022] The beneficial technical effects of this embodiment are as follows: the structure is simple and the installation is convenient; drainage is carried out through the drainage blind pipe, and waterproofing and heat preservation are achieved by using the outer waterproof board, the polyurethane insulation board and the inner waterproof board, realizing the drainage, waterproofing and heat preservation of the tunnel in cold regions.

[0023] Although the above embodiments have described in detail the concept and embodiments of the purpose of the present invention with reference to the drawings, those of ordinary skill in the art can recognize that various improvements and transformations can still be made to the present invention without departing from the scope defined by the claims, so they will not be elaborated here one by one.

Claims

1. A tunnel antifreeze protection section with an insulation board anti-drainage system, characterized by: It includes a drainage blind pipe installed on the inner side of the initial support, the drainage blind pipe is arranged along the tunnel circumference, the end of the drainage blind pipe extends to the bottom of the tunnel and is connected to the drainage channel at the bottom of the tunnel, and the inner side of the drainage blind pipe is sequentially provided with a geotextile, an outer waterproof board, a polyurethane insulation board, an inner waterproof board and a secondary lining; The outer waterproof board, the polyurethane insulation board and the inner waterproof board are connected by an I-shaped insulation board clamp. The insulation board clamp includes two wing plates and a web plate. The two wing plates are respectively connected to the outer waterproof board and the inner waterproof board. An insulation board joint is formed between the web plate and the two wing plates for installing the polyurethane insulation board.

2. A tunnel antifreeze protection section insulation board drainage system as claimed in claim 1, characterized in that: The included angle between the wing plate and the web plate is 70° to 85°.

3. A tunnel antifreeze protection section insulation board drainage system as claimed in claim 1, characterized in that: The gap between the insulation board insertion seam and the polyurethane insulation board is filled with polysulfide sealant.

4. A tunnel antifreeze protection section insulation board drainage system as claimed in claim 1, characterized in that: The wing plates are provided with hot-melt gaskets, and the two wing plates are electromagnetically welded to the outer waterproof plate and the inner waterproof plate respectively.

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