Waterproof and drainage structure for multi-year frozen soil sections of tunnels in cold areas

Abstract

The invention discloses a waterproof and drainage structure for multi-year frozen soil sections of tunnels in cold areas. The waterproof and drainage structure comprises drainage pipes including the longitudinal drainage pipe and the transverse drainage pipe. A plurality of sets of ventilating pipes are laid in the drainage pipes and connected through nylon buckles. The drainage pipes are wrappedwith air films. The ventilating pipes communicate with connecting pipes, one ends of the connecting pipes stretch out of the ground, and heating rods are arranged on the peripheries of the other endsof the connecting pipes. The connecting pipes communicate with a transverse pipe which is connected with a draught fan. A transverse switch is arranged on the transverse pipe which communicates with avertical pipe, and a vertical switch is arranged on the vertical pipe. The waterproof and drainage structure is low in cost and convenient to construct and mount, it can be ensured that when underground water is drained, the phenomenon of pipe bursting or pipe blocking caused by water freeze is avoided, meanwhile the heating rods and the draught fan serve as insurance facilities, and thus it is ensured that a drainage system is not frozen under the condition of the extremely cold weather.

Description

technical field [0001] The invention relates to the field of tunnel engineering in cold regions, in particular to a waterproof and drainage structure for permafrost sections of tunnels in cold regions. Background technique [0002] The operational safety of tunnels in cold regions is closely related to the waterproof and drainage structures. Once the waterproof and drainage structures fail, the safety of the tunnel cannot be guaranteed. During the construction and operation of tunnels in cold regions, the normal work of the waterproof and drainage structures in permafrost sections is particularly important. In permafrost regions, if the anti-drainage structure of tunnels in cold regions cannot be used normally, phenomena such as "pipe explosion" and "pipe blockage" will occur due to freezing, which will bring great hidden dangers to the operation of tunnels in cold regions. How to ensure that the waterproof and drainage structure of tunnels in cold regions can have long-ter...

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Problems solved by technology

[0003] From a conventional point of view, it is very difficult to regularly inspect and maintain the waterproof and drainage structure of the permafrost section of the tunnel in cold regions to ensure its normal use. The maintenance process requires excavation of lining concrete, which is time-consuming and laborious on the one hand. It will affect the stability of the tunnel. Improper handling is very likely to cause deformation of the tunnel, and may even cause the tunnel to become unstable and collapse.

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