市域(郊)铁路成眉线地下工程浅层天然气分布特征及评价研究  

Study on Distribution Characteristics and Evaluation of Shallow Natural Gas in the Underground Engineering of Chengdu-Meishan Suburban Railway(S5)Line

作　　者：任云[1] 陈明浩[1] 邱鹏 张培盛 陈兴海[1] 许晓君 REN Yun;CHEN Minghao;QIU Peng;ZHANG Peisheng;CHEN Xinghai;XU Xiaojun(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China;Southwest Petroleum University,Chengdu 610500,China;Sichuan Chengdu-Meishan Rail Transit Co.,Ltd.,Chengdu 610041,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031 [2]西南石油大学,成都610500 [3]四川成眉轨道交通有限公司,成都610041

出　　处：《高速铁路技术》2025年第2期110-115,共6页High Speed Railway Technology

基　　金：四川省重点研发项目(2019YFG0460);中铁二院科技研究开发计划课题(KDNQ242072,KSNQ202035,KDNQ21203)。

摘　　要：市域(郊)铁路成眉线(S5)眉山城区段地下区间位于盐井沟气田圈闭范围内,浅表地层具备受油气浸染的条件,且浅层天然气对盾构隧道的施工运营影响巨大。通过有害气体全孔检测方案以及创新性的分层检测方案,分别揭示出眉山城区段地下区间浅层天然气在线路纵向与高程的分布特征,并对区内浅表地层瓦斯富集及运移模式进行分析,据此提出隧道选线建议及防控措施。相关勘察工作对成都平原区类似隧道工程建设具有借鉴意义。The Meishan underground section of the Chengdu-Meishan Suburban Railway(S5)Line is situated in the trap zone of the Yanjinggou gas field.The shallow strata possess conditions for oil and gas infiltration,and the shallow natural gas has a significant impact on the construction and operation of shield tunnels.The conventional full-hole detection scheme and the innovative stratified detection scheme were used to reveal the vertical and elevation distribution characteristics of shallow natural gas in the Meishan underground section.And an analysis of gas enrichment and migration patterns in the shallow surface layer of the area was conducted.Based on this,suggestions for tunnel routing selection and preventive measures were put forward.The geological investigation has significant reference value for the construction of similar tunnels in the Chengdu Plain area.

关 键 词：浅层天然气 勘察 分层检测 富集特征 

分 类 号：U212.22[交通运输工程—道路与铁道工程] U239.5