Tunnel construction and maintenance integrated freezing damage-water damage prevention and control method

Abstract

The invention discloses a tunnel construction and maintenance integrated freezing damage-water damage prevention and control method, and belongs to the technical field of tunnel engineering construction. The specific scheme comprises the following steps that 1, the geological condition of soft rock and the development condition of underground water are detected accurately by using an advanced hole detection technology; 2, advanced drilling drainage and pressure reduction are carried out on a water-rich section according to an advanced hole detection result; 3, grouting and water plugging are conducted on an advanced small guide pipe, and surrounding rock is reinforced; 4, a primary support structure is excavated and constructed; 5, after primary support construction is completed, radial small guide pipes are constructed; 6, an inverted arch is excavated, and inverted arch concrete is poured; and 7, a secondary lining is constructed. According to the tunnel construction and maintenance integrated freezing damage-water damage prevention and control method, the influence of underground water and soft rock lithology on construction of the high-water-rich soft rock mountain ridge tunnel in an extreme freeze-thaw area is avoided, harm and damage to a tunnel in the high-water-rich freeze-thaw environment are effectively controlled, and the influence of freeze-thaw factors on tunnel construction and the operation period is reduced.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering construction, and in particular relates to a method for preventing and controlling freezing damage and water damage integrated with tunnel construction and maintenance. Background technique [0002] For soft rock mountain tunnels, compared with general rock mass, the rock mass joints and fissures in the soft rock mass are relatively broken, and the strength is low, and the self-stability of the surrounding rock is poor. In addition, if the soft rock mountain tunnel is located When it is a high-water-rich area with rich groundwater, the soft rock is easy to soften and disintegrate when it encounters water. When the tunnel passes through the high-water-rich soft rock during the construction period, it is prone to large deformation, sliding and collapse of the tunnel face, water and mud inrush, and excavation contours. Difficult to control, damage to the support structure, twisted and brok...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems existing in the construction period of soft rock mountain tunnels in high water-rich areas in extreme freeze-thaw areas, comprehensively analyze and consider the advantages and disadvantages of existing construction technologies, and provide a tunnel construction and maintenance integrated freeze damage-water damage prevention and control method

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