Pressure-adjustable waterproof plate suitable for tunnel in cold region and construction method

Abstract

The invention discloses a pressure-adjustable waterproof plate suitable for a tunnel in a cold region and a construction method, and relates to the technical field of tunnel construction. The pressure-adjustable waterproof plate comprises a waterproof plate body and a plurality of supporting columns arranged in the waterproof plate body, the waterproof plate body is of a hollow structure, the height of the supporting columns in the radial direction of the tunnel is slightly larger than the thickness of the waterproof plate body, one ends of the supporting columns are arranged on the inner sidewall of the waterproof plate body, the other ends of the supporting columns are arranged in a groove and tightly attached to a primary support, and therefore a water passing groove is formed betweenthe waterproof plate and the primary support. The waterproof plate body is internally provided with an air pressure monitoring device and is externally connected with an air pressure adjusting device,and the air pressure monitoring device and the air pressure adjusting device are connected with a control device. On one hand, the waterproof plate can reduce damage of frost heaving force caused byfreezing of tunnel surrounding rock seepage water in the cold region to a tunnel structure; and on the other hand, compared with a traditional waterproof and drainage plate, the hollow structure can effectively reduce the heat conductivity coefficient, and therefore the obvious heat preservation and heat insulation effects on tunnel surrounding rock in the cold region are achieved.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a pressure-adjustable waterproof board suitable for tunnels in cold regions and a construction method. Background technique [0002] my country has a vast territory and cold regions are widely distributed. The distribution areas of permafrost and seasonal frozen soil in my country are mainly concentrated in the west and north, accounting for more than 70% of my country's land area. With the westward shift of my country's economic construction strategic focus and the implementation of the central and western development policy, the number of traffic projects built at high altitudes and high latitudes continues to increase, including a large number of tunnel projects in cold regions. Practicality poses many difficulties. [0003] Through the investigation of the tunnels in the cold regions in the operation period in our country, it is found that more than 80% of the tu...

AI Technical Summary

Problems solved by technology

[0006] In existing tunnel projects in cold regions, most of the water stored on the waterproof board behind the lining is provided with an insulation layer to block the heat exchange between the waterproof board and the surrounding rock, or to increase the local temperature to prevent the water from freezing, but such measures High cost and limited effect

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