大别山区客运专线铁路隧道瓦斯涌出机理及施工对策

Gas Gushing Mechanisms and Construction Countermeasures for Passenger-dedicated Railway Tunnels in Dabieshan Mountainous Area

合(肥)武(汉)铁路客运专线经过大别山非变质岩地区,在隧道施工过程中发现燃烧现象,通过现场检测和化学试验确定岩石及气体成分,应用地质构造学理论探讨瓦斯涌出的机理,在此基础上提出了相关的施工技术措施,使隧道在整个施工过程中都处于安全可靠控制范围之内,该项技术在合武铁路客运专线隧道施工中得到初步应用并且收到了良好的效果。

Hefei-Wuhan passenger-dedicated railway goes through the non-metamorphic zones of Dabieshan mountainous area. During the construction of the tunnels on the railway, fire accidents occur. In-situ measurements and chemical tests are made to determine the compositions of the rocks and gases and the geo-tectonic theory is used to probe into the gas gushing mechanisms, on basis of which technical construction countermeasures are recommended. Therefore, the construction of the tunnels are under safe and reliable control during the complete construction course. The technology has been preliminarily used in the construction of the tunnels on Hefei-Wuhan passenger-dedicated railway and good effects have been achieved.