An antifreeze system and installation method for tunnels in seasonally frozen soil regions

Abstract

The invention discloses an anti-freezing system for a tunnel in a seasonally frozen soil region and a mounting method thereof. According to the anti-freezing system, a plurality of pressure sensors are arranged on an initial support, and thus the pressure change conditions at various points can be monitored in real time; when frost heave force occurs, the values of the pressure sensors are increased, a control system receives information, the working states of electric heating plates at the various points are controlled based on the information, intelligent precise control is realized, and theoccurrence probability of the frost heave force and freeze injury is effectively decreased; and through the anti-freezing form, fixed point work can be realized, the positions where the frost heave force occurs are positioned precisely and heated, thus the situation that the tunnel is heated in a full-length mode, and consequently electric energy is wasted is avoided. The anti-freezing system isfurther provided with a drainage pipe with a water inlet hole, thus water generated in the melting process of frost heave points can be drained in time, and secondary frost heave is avoided. The anti-freezing system is clear in structure, high in operability and capable of realizing environmental protection, and has good promotion prospects.

Description

technical field [0001] The invention belongs to the field of antifreeze and heat preservation, and in particular relates to an antifreeze system and an installation method for tunnels in seasonal frozen soil regions. Background technique [0002] With the continuous improvement of basic transportation facilities, the expressway network gradually extends to high-altitude areas in the west and high-latitude areas in the northeast. Most of the high-altitude and high-latitude areas are seasonally frozen soil areas. Tunnels in seasonally frozen regions. The climate in the seasonally frozen soil area changes significantly, and the temperature difference between winter and summer is large, and freeze-thaw cycles often occur. Current research shows that tunnels in the seasonally frozen soil area often suffer from freezing damage such as lining cracks, lining water leakage, and lining ice hanging due to seasonal freeze-thaw effects. On the one hand, due to the lack of experience in ...

AI Technical Summary

Problems solved by technology

In order to reduce or eliminate the frost heaving force, researchers have also done a lot of work and proposed many measures, but the surrounding rock and water source are the problems behind the lining, which are uncontrollable. Most of the current ideas are to avoid the low temperature of the surrounding rock as a means to reduce Due to the small frost heaving force, a variety of insulation measures have been proposed. Commonly used insulation methods include storm doors, laying insulation layers, and electric heating. ; An insulation layer is installed on the lining surface or between the primary support and the second lining, but the insulation effect of the insulation layer is difficult to achieve the expected effect; in addition, there is an active insulation electric heat tracing heating, heat preservation and waterproof, but the electric heat tracing cost is too high and has not been obtained. widely used

It can be seen that there is no better method for the frost protection of tunnels in seasonally frozen soil areas, and the problem of freezing damage to tunnels in seasonally frozen soil areas is a realistic problem that needs to be solved urgently

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