A drainage system for tunnels in severe cold regions

Abstract

The invention relates to a drainage system for a tunnel in a severe cold region, comprising an inverting and initial supporting layer, wherein a center water pipe groove extending along the center line of each tunnel is excavated below the inverting and initial supporting layer, the center water pipe groove is internally provided with a center water pipe communicated with a lining drainage blind pipe by virtue of a transverse water pipe, and the center water pipe is completely deeply buried when the length of the tunnel is less than or equal to four kilometres; when the length of the tunnel is more than four kilometres, the center water pipe two kilometres near the inlet and the outlet of the tunnel is completely deeply buried, and the center water pipe paved on the rest segment of the tunnel is shallowly buried; and a drainage surface of the center water pipe which is deeply buried is arranged below a local frost line. The drainage system provided by the invention can adapt different weather conditions in various regions, the characteristic that temperature inside the tunnel is higher is fully utilized, the center water pipe which is 2000m long is deeply buried at the two ends of the tunnel respectively, and buried depth of the center water pipe can be reduced inside the tunnel, so that construction labour hour can be reduced and material and manpower cost can be further saved.

Description

technical field [0001] The invention relates to a drainage system for tunnels, in particular to a drainage system for tunnels in severe cold regions, and belongs to the technical field of tunnel waterproofing and drainage. Background technique [0002] Tunnels built in northern my country and high-altitude cold areas, when winter comes, due to low temperature, the water flow is easy to freeze and block the drainage pipes, which will cause ice on the arch of the tunnel, ice on the side wall, ice on the network cable equipment in the cave, and surrounding rocks. Frost heaving, lining swelling, ice cones at the bottom of the tunnel, ice plugs in water ditches, frozen lines, etc. not only cause damage to the tunnel lining structure, but also cause boundary violations, endangering driving safety. For example, in Jiaohe City, Jilin Province, the local average temperature of the coldest month is -23.4°C, and the extreme minimum temperature is -41.8°C. It is a severe cold area, and t...

AI Technical Summary

Problems solved by technology

However, the inventor did not further propose the shape of the deep-buried water pipe suitable for the actual situation and did not properly handle the connection relationship between the deep-buried water pipe and the horizontal drainage blind pipe in the tunnel, resulting in an increase in construction costs and a great waste of cost and easy to cause silt clogging

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