Tunnel structures for gas tunnels

Abstract

The invention relates to the field of gas prevention and control of operating tunnels, and discloses a tunnel structure for gas tunnels, including primary support, secondary lining, tunnel drainage structures, and a water and gas drainage separation system for the gas fortification section. The separation system includes longitudinal drainage pipes, gas discharge pipes and circumferential blind ditches. The gas discharge pipes are arranged longitudinally on the vault, the longitudinal drainage pipes are respectively arranged longitudinally at the bottom of the side walls on both sides, and the circumferential blind ditches are arrayed longitudinally along the tunnel and buried. In the initial support of the gas fortification section, the upper part of each circular blind ditch is connected to the gas discharge pipe, and the two ends are respectively connected to the longitudinal drainage pipe. There are water and gas collection holes on the pipe wall. The tunnel structure is equipped with a water and gas drainage separation system. , to separate and discharge water and gas, which can effectively avoid potential safety hazards and even accidents caused by the accumulation of gas and groundwater behind the lining, prevent gas from entering the drainage system, and ensure the safety of gas prevention and control after the operation of the tunnel. It is suitable for gas tunnels of all levels.

Description

technical field [0001] The invention relates to the field of gas prevention and control of operational tunnels, in particular to a tunnel structure for gas tunnels. Background technique [0002] The current road construction is developing rapidly, the proportion of tunnels is large, and there are more and more gas tunnels. Gas is a colorless, odorless gas that is insoluble in water, with a relative density of 0.554 and a permeability 1.6 times that of air. The main component is alkanes, of which methane accounts for the vast majority. When it reaches a certain concentration, it can burn or explode. . The so-called gas tunnel is a tunnel that passes through the gas formation. Therefore, during the construction and operation of the gas tunnel, if the management and prevention are not done properly, it is easy to cause major safety accidents, and its safety problems are very serious. [0003] At present, the research on gas tunnels in the industry is focused on the management...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a tunnel structure for gas tunnels, solve the problem of gas prevention and control after the tunnel is completed and in operation, and avoid the accumulation of gas behind the lining

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