铁路隧道高瓦斯工区施工技术经济现状分析

Analysis of Current Situation of Construction Technology and Economy in High Gas Industrial Area of Railway Tunnel

近年来,铁路建设中遇到的瓦斯隧道逐渐增多。相比普通隧道施工,瓦斯的存在对隧道施工的各工序环节都有着不同程度的影响,隧道施工成本大幅增加。但勘察设计阶不易获取瓦斯隧道绝对瓦斯涌出量、瓦斯压力等指标,瓦斯等级很难准确评定,导致前期概算费用不易合理确定和控制。鉴于此,本文以某高瓦斯隧道为例,介绍了瓦斯防范和管控措施,对瓦斯预防和管控措施费用计取提出建议。

The number of gas tunnels encountered in railway construction has gradually increasedin recent years.Compared with ordinary tunnel construction,the existence of gas has different degrees of influence on all the processes of tunnel construction,and the cost of tunnel construction has increased greatly.However,the survey design order is not easy to obtain the gas tunnel absolute gas surge,gas pressure and other indicators,gas grade is difficult to accurately assess,resulting in the cost of the previous estimate is not easy to reasonably determine and control.In view of this,this paper takes a high gas tunnel as an example,introduces the gas prevention and control measures,and puts forward some suggestions on the cost of gas prevention and control measures.