摘要
南京地铁4号线桦墅站—仙林东站区间穿越角砾状灰岩地层,沿线岩溶发育,具有规模大小不一、数量多等特征。文章通过对该场区内地层岩性、地质构造、地下水动力分带和地形地貌条件的分析,找出了其岩溶发育的规律;同时,针对本场区的岩溶发育特征,将有地质缺陷的隧道围岩和地下水两类地质要素相结合,对岩溶区隧道开挖可能诱发的突水、突泥和地面塌陷灾害进行了机理分析。据此可采取有效防治对策,确保地铁建设与运营安全。
The running tunnel section between the Huasu station and the Xianlin Eastern Station of the Nanjing Metro line 4 passes through a brecciated limestone stratum that is characterized by many karst caves of various sizes. By analyzing the formation lithology, geological structures, hydrodynamic zoning of the underground water, and geographic and geomorphic conditions, the law of karst development in this area was determined. In light of the characteristics of karst development in this area, an analysis of the mechanisms of geological disasters com- monly induced by tunneling in karst areas, such as water bursting, mud bursting, and ground collapsing, was con- ducted by considering the key geological factors of tunnel surrounding rocks, geological defaults, and groundwater. Further preventative countermeasures were taken to assure construction and operation safety.
出处
《现代隧道技术》
EI
北大核心
2013年第5期12-17,共6页
Modern Tunnelling Technology
关键词
岩溶地质
地铁隧道
灾害防治
Karst geology
Metro tunnel
Disaster prevention and control
