Spraying type tunnel heat preservation waterproof structure

Abstract

The utility model relates to a spraying type tunnel heat preservation waterproof structure which comprises a wall top drainage structure or a wall bottom drainage structure formed in a tunnel. The tunnel is provided with an annular construction joint; a composite waterproof layer is arranged in the annular construction joint. A BG-S self-healing type anti-carbonization waterproof coating is sprayed on a slope support; the adhesive can be bonded with a primary support (concrete) under the synergistic effect of physical mortises and tenons and chemical reactions, an interface sealing layer is generated, the waterproof requirement can be met, the adhesive can be tightly attached to the surface of the primary support, and the problems that the surface of the primary support is uneven and bulges occur are effectively solved.

Description

Technical Field

[0001] The utility model relates to a thermal insulation and waterproof structure, in particular to a spray-type tunnel thermal insulation and waterproof structure, belonging to the technical field of tunnel construction. Background Technique

[0002] When building tunnels in cold and high-altitude areas, due to large temperature differences and humidity changes, the thermal insulation and waterproof performance of tunnels is crucial. Traditional thermal insulation and waterproof methods often use multiple layers of different materials for superimposed construction, which not only has complex procedures and long construction times, but also makes it difficult to ensure long-term waterproof and thermal insulation effects. Therefore, it is particularly important to develop an integrated structural material that can be quickly constructed and meet long-term thermal insulation and waterproof requirements.

[0003] In current tunnel projects, non-woven fabrics and EVA waterproof boards are used as waterproof materials between the primary support and the secondary lining; polyurethane insulation boards are used as thermal insulation materials. Problems caused by conventional waterproof and thermal insulation technical measures:

[0004] 1. Due to the uneven surface of the primary support, whether the EVA waterproof board is laid too tightly or too loosely will cause the EVA waterproof board to be hollowed. The welding between EVA waterproof boards is not firm, and cracks will occur under the pressure of pouring the secondary lining concrete, resulting in leakage during operation;

[0005] 2. Polyurethane insulation boards are flammable to a certain extent, posing a great safety hazard in the confined and limited-space tunnel construction;

[0006] 3. Polyurethane insulation boards are produced in factories and have a certain hardness. They cannot be closely attached to the tunnel structure and cannot continuously and seamlessly cover the surface of the primary support, resulting in a cold bridge effect, energy loss, and uneven temperature distribution, and cannot achieve the expected thermal insulation effect. Content of the Utility Model

[0007] The purpose of the utility model is to solve the above-mentioned disadvantages and provide a spray-type tunnel thermal insulation and waterproof structure with excellent waterproof effect, stable primary support, simple and reasonable structure, and simplified construction process.

[0008] The technical solution adopted by the utility model to achieve the above purpose is as follows

[0009] A spray-type tunnel thermal insulation and waterproof structure includes a wall-top drainage structure or a wall-bottom drainage structure formed in the tunnel; the tunnel has a circumferential construction joint; a composite waterproof layer is provided in the circumferential construction joint.

[0010] Furthermore, the wall-top drainage structure includes a slope support arranged along the top of the side wall of the open cut tunnel; a gravel filter layer and a concrete layer are filled in the slope support.

[0011] Furthermore, the top wall drainage structure further includes a blind pipe disposed in the gravel filter layer; the blind pipe is connected to a drainage blind ditch; the bottom of the drainage blind ditch is connected to a vertical drain outlet.

[0012] Furthermore, the slope of the blind pipe is greater than or equal to 3‰; the interval between each drainage blind ditch is 6m; the inner diameter of the drainage blind ditch is 50mm.

[0013] Furthermore, the slope protection has a lining structure therein; the lining structure is sprayed with BG-S self-healing anti-carbonation waterproof coating, a thermal insulation layer and a protective layer; the blind pipe, the gravel filter layer, the concrete layer and the drainage blind ditch are all disposed on the outer surface of the protective layer.

[0014] Furthermore, the bottom wall drainage structure includes slope protection disposed along the bottom of the open cut tunnel wall; a lining structure is disposed inside the slope protection; a gravel filter layer and dry rubble masonry are disposed inside the slope protection.

[0015] Furthermore, the bottom wall drainage structure further includes a blind pipe disposed at the bottom of the slope protection; the blind pipe is connected to a vertical drain outlet.

[0016] Furthermore, the composite waterproof layer includes a rubber waterstop and a butyl rubber self-adhesive waterproof coil.

[0017] The utility model has the following beneficial effects: By spraying BG-S self-healing anti-carbonation waterproof coating on the slope protection; it can bond with the primary support (concrete) through physical mortise and chemical reaction synergy to generate an interface sealing layer, which can not only meet the waterproof requirements but also be closely attached to the surface of the primary support, effectively solving the problems of uneven surface and bulging of the primary support; at the same time, the thermal insulation layer can be closely attached to the waterproof layer to continuously and seamlessly cover the primary support to avoid the cold bridge effect; combined with the drainage function of the top wall drainage structure or the bottom wall drainage structure, it can improve the drainage capacity and waterproof capacity of the primary support.

[0018] The butyl rubber self-adhesive waterproof coil is used as the composite waterproof layer in the circumferential construction joint. It has low requirements for the base surface and can be directly constructed on the wet or damp structural concrete base, greatly shortening the construction period and saving construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic structural diagram of an embodiment of the utility model.

[0020] Figure 2 It is a schematic structural diagram of another embodiment of the utility model.

[0021] Figure 3 It is a schematic structural diagram of the composite waterproof layer of the construction joint.

[0022] Wherein: 1 is a protective layer, 2 is a heat-insulating layer, 3 is a waterproof layer, 4 is ramming earth and stone, 5 is a gravel filter layer, 6 is a blind pipe, 7 is a concrete layer, 8 is a drainage blind ditch, 9 is a vertical drain pipe outlet, 10 is dry-laid rubble, and 11 is a slope support. Specific embodiments

[0023] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] The terms used herein, including technical and scientific terms, have the same meaning as commonly understood by those of ordinary skill in the art, unless otherwise defined. It should be understood that the terms defined in the commonly used dictionary have the same meaning as the terms in the prior art.

[0025] Embodiment 1

[0026] See Figure 1 , a spray-type tunnel heat-insulating and waterproof structure, including a wall-top drainage structure or a wall-bottom drainage structure formed in the tunnel; the tunnel has a circumferential construction joint; a composite waterproof layer is provided in the circumferential construction joint.

[0027] Furthermore, the wall-top drainage structure includes a slope support 11 provided along the top of the side wall of the open cut tunnel; the slope support 11 is filled with a gravel filter layer 5 and a concrete layer 7.

[0028] Furthermore, the wall-top drainage structure further includes a blind pipe 6 provided in the gravel filter layer 5; the blind pipe 6 is connected to a drainage blind ditch 8; the bottom of the drainage blind ditch 8 is connected to a vertical drain pipe outlet 9.

[0029] Furthermore, the slope of the blind pipe 6 is greater than or equal to 3‰; the interval between each drainage blind ditch 8 is 6 m; the inner diameter of the drainage blind ditch 8 is 50 mm.

[0030] Furthermore, a BG-S self-healing anti-carbonation waterproof coating 3, a heat-insulating layer 2 and a protective layer 3 are sprayed on the slope support 11; the blind pipe 6, the gravel filter layer 5, the concrete layer 7 and the drainage blind ditch 8 are all provided on the outer surface of the protective layer.

[0031] In this embodiment, the open cut tunnel is excavated along the top of the side wall. After slope support is carried out according to the design requirements, the lining formwork is fabricated, and the open cut tunnel lining structure is poured. Before that, a vertical drainage blind ditch 8 with an inner diameter of 50 mm DG blind pipe and a bottom inner diameter of 100 mm DG blind pipe 6 are arranged, and the slope is not less than 3‰. After the open cut tunnel lining concrete reaches the design strength, debris, soil and other sundries on the slope and the lining surface are cleaned, and the BG-S self-healing anti-carbonation waterproof coating 3 is sprayed to the design thickness by equipment. After it reaches the strength, the thermal insulation layer 2 is sprayed to the design thickness by equipment. After it reaches the strength, a protective layer is sprayed to the design thickness on its surface 2. The upper inner diameter of 100 mm DG blind pipe 6 is installed, and C20 concrete 7 is poured. After it reaches the design strength, a crushed stone filter layer 5 and earth and stone are tamped and filled 4.

[0032] Embodiment 2

[0033] Furthermore, the bottom drainage structure of the wall includes slope support 11 arranged along the bottom of the open cut tunnel wall; a lining structure is arranged inside the slope support 11; a crushed stone filter layer 5 and dry rubble masonry 10 are arranged inside the slope support 11.

[0034] Furthermore, the bottom drainage structure of the wall further includes a blind pipe 6 arranged at the bottom of the slope support 11; the blind pipe 6 is connected with a vertical drain outlet 9.

[0035] The open cut tunnel is excavated along the bottom of the wall. After slope support 11 is carried out according to the design requirements, the lining formwork is fabricated, and the open cut tunnel lining structure is poured. Before that, a longitudinal blind ditch and a vertical drain outlet 9, and a bottom inner diameter of 100 mm DG blind pipe 6 are arranged, and the slope is not less than 3‰. After the open cut tunnel lining concrete reaches the design strength, debris, soil and other sundries on the slope and the lining surface are cleaned, and the BG-S self-healing anti-carbonation waterproof coating 3 is sprayed to the design thickness by equipment. After it reaches the strength, the thermal insulation layer 2 is sprayed to the design thickness by equipment. After it reaches the strength, a protective layer is sprayed to the design thickness on its surface 2. The upper inner diameter of 100 mm DG blind pipe 6 is installed, and C20 concrete 7 is poured. After it reaches the design strength, dry rubble masonry 10, a crushed stone filter layer 5 and earth and stone are backfilled and tamped 4.

[0036] Furthermore, the composite waterproof layer includes a rubber water stop 19 and a butyl rubber self-adhesive waterproof coiled material 16.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A spray-coated tunnel thermal insulation and waterproof structure, characterized in that: The invention comprises a wall top drainage structure or a wall bottom drainage structure formed in the tunnel; the tunnel has an annular construction joint; and a composite waterproof layer is arranged in the annular construction joint.

2. A spray-coated tunnel thermal insulation and waterproof structure according to claim 1, characterized in that: The wall top drainage structure comprises a slope support (11) arranged along the top of the open hole side wall; the slope support (11) is filled with a crushed stone filter layer (5) and a concrete layer (7).

3. A spray-coated tunnel thermal insulation and waterproof structure according to claim 2, characterized in that: The wall top drainage structure further comprises a blind pipe (6) arranged in the gravel filter layer (5); the blind pipe (6) is connected to a drainage blind ditch (8); and the bottom of the drainage blind ditch (8) is connected to a vertical drainage pipe outlet (9).

4. A spray-coated tunnel thermal insulation and waterproof structure according to claim 3, characterized in that: The slope of the blind pipe (6) is greater than or equal to 3‰; the interval between each of the drainage blind ditches (8) is 6m; and the inner diameter of the drainage blind ditch (8) is 50mm.

5. A spray-coated tunnel thermal insulation and waterproof structure according to claim 4, characterized in that: The slope support (11) is sprayed with a BG-S self-healing anti-carbonization waterproof coating (3), a thermal insulation layer (2) and a protective layer; the blind pipe (6), the gravel filter layer (5), the concrete layer (7) and the drainage blind ditch (8) are all arranged on the outer surface of the protective layer.

6. The spray-coated tunnel thermal insulation and waterproof structure according to claim 1, characterized in that: The wall bottom drainage structure comprises a slope support (11) arranged along the bottom of the open hole wall; a lining structure is arranged inside the slope support (11); and a crushed stone filter layer (5) and dry-laid stone slabs (10) are arranged inside the slope support (11).

7. The spray-coated tunnel thermal insulation and waterproof structure according to claim 6 is characterized by: The wall bottom drainage structure further comprises a blind pipe (6) arranged at the bottom of the slope support (11); the blind pipe (6) is connected to a vertical drainage pipe outlet (9).

8. The spray-coated tunnel thermal insulation and waterproof structure according to claim 1 is characterized by: The composite waterproof layer comprises a rubber water stop strip (19) and a butyl rubber self-adhesive waterproof roll material (16).

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