Tunnel ring direction drainpipe equipped with strip heat-insulating layer

Abstract

The invention discloses a tunnel circumferential drainage pipe provided with a band insulation layer. The tunnel circumferential drainage pipe comprises a circumferential drainage pipe behind the liner wall, and two circumferential drainage pipe which are arranged below the road surface and are connected with two ends of the circumferential drainage pipe behind the liner wall., wherein the circumferential drainage pipes behind the liner wall is a water permeable pipe, the two circumferential drainage pipe arranged below the road surface are arranged transversely and are communicated with the circumferential drainage pipe behind the lining wall and a central drainage pipe at the center of the tunnel. The band insulation layer arranged at one side of the circumferential drainage pipe behind the liner wall close to a concrete lined wall comprises two layers of waterproof boards and a heat insulation material layer between the two layers of the waterproof boards. The tunnel circumferential drainage pipe has a simple structure, low cost, and short flow distance of drainage. In addition, the heat insulation material is not soaked by stratum seeped water, and the pipe is not blocked due to icing, so the stratum seeped water behind the tunnel liner wall can be effectively and rapidly drained.

Description

technical field [0001] The invention relates to a tunnel circumferential drainage pipe, in particular to a tunnel circumferential drainage pipe provided with a strip insulation layer. Background technique [0002] Tunnels in cold regions often freeze due to the freezing of the drainage system behind the lining wall, especially the freezing of the circumferential drainage pipes, which leads to poor drainage of the tunnel and induces various tunnel freezing damages. There are two kinds of antifreeze methods for the existing tunnel circumferential drainage pipes: one is to set an insulating layer on the outer surface of the tunnel lining; the other is to set an insulating layer behind the tunnel lining wall. The disadvantage of the first method is that in the cold season, if the tunnel lining is not waterproof, water seepage will soak the insulation layer on the surface of the lining, reduce the insulation performance of the insulation layer, and gradually cause the insulation ...

AI Technical Summary

Problems solved by technology

The disadvantage of the first method is that in the cold season, if the tunnel lining is not waterproof, water seepage will soak the insulation layer on the surface of the lining, reduce the insulation performance of the insulation layer, and gradually cause the insulation layer to peel off. the road is flowing and icy

The disadvantage of the second method is that it does not pay attention to the waterproof and moisture-proof of the insulation layer. The insulation layer is in a humid environment all the year round, and its insulation performance will be greatly reduced.

In addition, the construction techniques of the two methods are relatively complicated and the project cost is high.

In the prior art, the ground seepage water is collected into the longitudinal drainage pipes on both sides laid along the outer corners of the tunnel lining base through the circumferential drainage pipes, and then flows through the horizontal drainage pipes connecting the longitudinal drainage pipes and the central drainage pipe of the tunnel, and finally passes through The central drainage pipe is discharged, and the ground seepage water flows through a long distance, which is easy to cause poor drainage due to reasons such as freezing in the pipe, and the actual use effect is poor

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