Three-layer waterproof heat preservation structure for high-speed rail tunnel in cold region

Abstract

The utility model discloses a three-layer waterproof thermal insulation structure of a high-speed rail tunnel in a cold region, which relates to the field of tunnel lining waterproof thermal insulation layer installation and comprises a first layer of waterproof board fixed on the inner wall of the tunnel, first polyurethane thermal insulation boards are installed one by one from the side wall, and a back waterproof batten of each polyurethane thermal insulation board is welded on the first layer of waterproof board. The front waterproof batten of the next polyurethane insulation board is welded and fixed with the front waterproof batten of the previous polyurethane insulation board, a second waterproof board is mounted after all the polyurethane insulation boards are mounted, and the second waterproof board is welded and fixed with a hot melting gasket. According to the structure, the construction time can be effectively shortened, operation is easy, and mastering is easy; the insulation boards can be tightly attached to the first layer of waterproof board, tightly attached to one another and reliably welded to the second layer of waterproof board, and the quality problems that the insulation boards fall off, the back of the insulation boards is disengaged and the like are solved.

Description

Technical Field

[0001] The utility model relates to the field of tunnel lining waterproof and thermal insulation layer installation, and is particularly suitable for the construction of a three-layer waterproof and thermal insulation structure of "waterproof board (EVA) + thermal insulation board (rigid polyurethane) + waterproof board (EVA)" in cold zone tunnels. Specifically, it is a three-layer waterproof and thermal insulation structure for cold zone high-speed railway tunnels. Background Art

[0002] At present, the general tunnels in China adopt the drainage method of laying a single layer of waterproof board and installing circumferential and longitudinal drainage blind pipes between the waterproof board and the initial support. However, the water behind the lining of the cold-region tunnel freezes when it is cold. When setting the waterproof layer, it is also necessary to set a thermal insulation layer to ensure that the water behind the lining does not freeze and can be discharged smoothly out of the tunnel. Tunnels in cold and plateau areas in China mostly adopt a three-layer waterproof insulation structure of "waterproof board (EVA) + insulation board (rigid polyurethane) + waterproof board (EVA)". The biggest construction difficulty of this structure is how to fix the polyurethane insulation board and how to fix the polyurethane insulation board and the second layer of waterproof board. The traditional construction process adopts the circumferential tension connection method of the waterproof board connecting belt. One end of the two connecting belts is welded to the upper surface of the waterproof board. After the insulation board is in place, the two connecting belts are tightened, and the other ends of the connecting belts are also welded to the surface of the waterproof board. In this way, the first insulation board is fixed; then, the connecting belt fixing the second insulation board is welded to the surface of the connecting belt fixing the first insulation board. When laying the second layer of waterproof board, simply weld the waterproof board and the connecting belt firmly with a hot melt welding gun.

[0003] However, the above structure has construction defects. First, the efficacy is low, and second, the installation quality problem cannot effectively control the sinking amount. Therefore, a new waterproof and thermal insulation structure is proposed to solve the above problems. Utility Model Content

[0004] The utility model aims to solve the problem that the waterproof and thermal insulation structure installed by the traditional construction technology has low efficacy and cannot effectively control the sinking amount.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a three-layer waterproof and thermal insulation structure for a high-speed railway tunnel in a cold region, which adopts the following technical scheme, including: a polyurethane thermal insulation board, a plurality of plastic nails are installed on the back of the polyurethane thermal insulation board, the plastic nails are fixed with back waterproof strips on the back of the polyurethane thermal insulation board, the plastic nails pass through the front of the polyurethane thermal insulation board and are installed with hot-melt washers, a front waterproof strip is arranged between the hot-melt washers and the polyurethane thermal insulation board, the back waterproof strips are welded to the first layer of waterproof board, and the hot-melt washers are welded and fixed to the second layer of waterproof board.

[0006] Furthermore, the first layer of waterproof board is fixed on the inner wall of the tunnel, and the first polyurethane thermal insulation board is installed one by one starting from the side wall. The back waterproof strips of each polyurethane thermal insulation board are welded to the first layer of waterproof board, and the front waterproof strips of the next polyurethane thermal insulation board are welded and fixed to the front waterproof strips of the previous polyurethane thermal insulation board. After all the polyurethane thermal insulation boards are installed, the second layer of waterproof board is installed, and the second layer of waterproof board is welded and fixed to the hot-melt gasket.

[0007] Furthermore, the front waterproof strips and the back waterproof strips are 5 cm wide and 15 cm long. The front waterproof strips are arranged in two rows, 3 in each row. The hot-melt gasket is 5 cm away from the long side of the polyurethane insulation board and 10 cm away from the short side, with a spacing of 0.5 m. The back waterproof strips are arranged in one row.

[0008] Compared with the prior art, the beneficial effects of the utility model are:

[0009] 1. Improve efficiency. The traditional process takes 50 hours to construct a waterproof and thermal insulation layer of a lining (12m). The method of the utility model reduces the number of welding times of the waterproof board connection belt by 30 hours, effectively shortening the construction time.

[0010] 2. Simple operation. The method of the utility model adds a hot-melt gasket to the insulation board, and the second layer of waterproof board can be directly welded to the hot-melt gasket of the insulation board by a magnetic welding machine. Compared with the traditional method of using a manual hot-melt device, the operation is simple and easy to master.

[0011] 3. Improve construction quality. The construction method of the utility model can make the insulation board and the first layer of waterproof board close together, the insulation boards can be close to each other, and the insulation board and the second layer of waterproof board can be reliably welded, reducing quality problems such as the insulation board falling off and the back being empty.

[0012] The utility model is convenient for installing the thermal insulation layer, and at the same time improves the construction efficiency and construction quality, reduces the quality problems such as the thermal insulation board falling off and the back being empty, and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the longitudinal section of the insulation board of the utility model;

[0014] Figure 2 This is a front view of the insulation board of the utility model;

[0015] Figure 3 This is a schematic diagram of the back side of the insulation board of the utility model;

[0016] Figure 4 This is a schematic diagram of the connection and fixation of the insulation board of the utility model.

[0017] In the figure: 1- polyurethane insulation board; 2- hot melt gasket; 3- plastic nail; 4- front waterproof strip; 5- back waterproof strip. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0019] In the description of the present invention, it should be noted that the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] The starting point of the utility model is to use the leftover scraps of waterproof boards to make waterproof board connection belts, and fix the waterproof board connection belts and hot-melt washers to the insulation board together through plastic nails. The insulation board can use a manual hot air welding gun to weld the waterproof board connection belts to the first layer of waterproof boards. The connection between the upper and lower insulation boards is also welded by the adjacent waterproof board connection belts. The second layer of waterproof boards and the hot-melt washers on the insulation boards are welded by a magnetic welding machine. The first layer of waterproof boards + insulation boards + second layer of waterproof boards together form the waterproof and thermal insulation system of the tunnel.

[0022] like Figure 1-Figure 4 As shown, the utility model is a three-layer waterproof and heat-insulating structure for a high-speed railway tunnel in a cold region, comprising: a polyurethane heat-insulating board 1, a plurality of plastic nails 3 are installed on the back of the polyurethane heat-insulating board 1, the plastic nails 3 are fixed with back waterproof strips 5 on the back of the polyurethane heat-insulating board 1, the plastic nails 3 pass through the front of the polyurethane heat-insulating board 1 and are installed with hot-melt gaskets 2, a front waterproof strip 4 is arranged between the hot-melt gasket 2 and the polyurethane heat-insulating board 1, the back waterproof strips 5 are welded to the first layer of waterproof board, and the hot-melt gasket 2 is welded and fixed to the second layer of waterproof board.

[0023] Specifically, the first layer of waterproof board is fixed on the inner wall of the tunnel, the first polyurethane insulation board 1 is installed one by one starting from the side wall, the back waterproof strips 5 of each polyurethane insulation board 1 are welded to the first layer of waterproof board, the front waterproof strips 4 of the next polyurethane insulation board 1 are welded and fixed to the front waterproof strips 4 of the previous polyurethane insulation board 1, and the second layer of waterproof board is installed after all polyurethane insulation boards 1 are installed, and the second layer of waterproof board is welded and fixed to the hot-melt gasket 2.

[0024] In a specific embodiment, the front waterproof slats 4 and the back waterproof slats 5 are 5 cm wide and 15 cm long. The front waterproof slats 4 are arranged in two rows, 3 in each row. The hot-melt gasket 2 is 5 cm away from the long side of the polyurethane insulation board 1 and 10 cm away from the short side, with a spacing of 0.5 m. The back waterproof slats 5 are arranged in one row.

[0025] The traditional construction process takes 50 hours to construct a waterproof and thermal insulation layer of a lining (12m). By adopting the structure of the utility model, this method reduces the welding time of the waterproof board connection belt by 30 hours, thus effectively shortening the construction time.

[0026] By adopting the structure of the utility model, a hot-melt gasket is added to the insulation board, and the second waterproof board can be directly welded to the hot-melt gasket of the insulation board by a magnetic welding machine. Compared with the traditional method of using a manual hot-melt device, the operation is simple and easy to master.

[0027] The structure of the utility model can make the insulation board closely attached to the first waterproof board, closely attached to each other, and reliably welded to the second waterproof board, thereby reducing quality problems such as the insulation board falling off and the back being empty.

[0028] The above embodiments are only preferred embodiments of the present invention. The above descriptions do not limit the protection scope of the present invention in turn. The above descriptions are exemplary and not exhaustive. Therefore, any equivalent changes made according to the structure, shape, and principle of the present invention should be included in the protection scope of the present invention. Without departing from the scope and spirit of the described embodiments, many modifications and changes are obvious to ordinary technicians in this technical field.

Claims

1. A three-layer waterproof and thermal insulation structure for high-speed railway tunnels in cold regions, characterized in that: include: A polyurethane thermal insulation board (1), wherein a plurality of plastic nails (3) are installed on the back of the polyurethane thermal insulation board (1), wherein the plastic nails (3) are fixed with a back waterproofing strip (5) on the back of the polyurethane thermal insulation board (1), wherein the plastic nails (3) pass through the front of the polyurethane thermal insulation board (1) and are installed with a hot-melt gasket (2), wherein a front waterproofing strip (4) is arranged between the hot-melt gasket (2) and the polyurethane thermal insulation board (1), wherein the back waterproofing strip (5) is welded to a first layer of waterproof board, and the hot-melt gasket (2) is welded and fixed to a second layer of waterproof board.

2. The three-layer waterproof and thermal insulation structure of a high-speed railway tunnel in cold regions according to claim 1 is characterized in that: The first layer of waterproof board is fixed on the inner wall of the tunnel. The first polyurethane insulation board (1) is installed one by one starting from the side wall. The back waterproof board strip (5) of each polyurethane insulation board (1) is welded to the first layer of waterproof board. The front waterproof board strip (4) of the next polyurethane insulation board (1) is welded and fixed to the front waterproof board strip (4) of the previous polyurethane insulation board (1). After all the polyurethane insulation boards (1) are installed, the second layer of waterproof board is installed. The second layer of waterproof board is welded and fixed to the hot-melt gasket (2).

3. A three-layer waterproof and thermal insulation structure for a high-speed railway tunnel in cold regions according to claim 1 or 2, characterized in that: The front waterproof strip (4) and the back waterproof strip (5) are 5 cm wide and 15 cm long. The front waterproof strip (4) is arranged in two rows, 3 strips in each row. The hot-melt gasket (2) is 5 cm away from the long side of the polyurethane insulation board (1) and 10 cm away from the short side, with a spacing of 0.5 m. The back waterproof strip (5) is arranged in one row.

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