Tunnel leakage water treatment method in alpine region

Abstract

The invention discloses a tunnel leakage water treatment method in an alpine region. The method comprises the following steps of 1, exploring a tunnel water seepage section and a water-rich section; 2, determining the size of a tunnel side wall pilot tunnel drainage structure; 3, excavating a tunnel lining; 4, excavating a tunnel side wall pilot tunnel drainage structure; 5, punching a plurality of underground punching water seepage drainage guide pipes in a radial mode; 6, excavating a water collecting and sand settling well; 7, excavating, burying and connecting the drainage pipes; 8, draining cutting parts of a waterproof layer and a longitudinal drainage blind pipe of the original tunnel; and 9, installing an inspection door. According to the method, on the premise that tunnel safety is not interfered, rainfall is concentrated outside the tunnel, an electric heating automatic temperature control device is installed, it is guaranteed that underground water can enter a pilot tunnel through the radial underground punching water seepage drainage guide pipes and then is drained out of the tunnel through a central drainage pipe in the low-temperature environment of the tunnel, and the problems that due to the fact that the tunnel is in the alpine region, the circumferential and longitudinal blind pipes on the outer side of the lining are frozen and blocked, so that tunnel vault and side wall water leakage is caused, and the road surface is frozen to affect passing are solved.

Description

technical field [0001] The invention belongs to the technical field of tunnel water leakage treatment in alpine regions, and in particular relates to a method for treating tunnel leakage water in alpine regions. Background technique [0002] The current tunnel lining design generally adopts C35 concrete with a thickness of 30cm-60cm according to the type of external surrounding rock. This thickness has no effect in areas with good temperature in the plains. The tunnel waterproof and drainage system can normally play the role of blocking and draining. However, the tunnels in the plateau alpine region or the high latitude extremely cold region are affected by the extreme low temperature and the duration of different degrees, and are also affected by the freezing depth to different degrees. Permafrost is common in these areas. Compared with permafrost lining, concrete has better heat transfer performance than permafrost. In fact, the freezing depth of lining is deeper than perm...

AI Technical Summary

Problems solved by technology

The use of branch drainage tunnel method requires the construction of multiple branch drainage tunnels according to the terrain. The engineering volume is huge, and the terrain is difficult to meet the requirements.

Using the method of parallel drainage tunnels on the side of the tunnel requires the construction of a drainage tunnel that is as long as the frozen length of the main tunnel. The accompanying problem is: whether to construct a parallel drainage tunnel on the other side of the tunnel? Internal heating facilities and equipment are also indispensable, and the project investment is huge

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