摘要
宜都至来凤高速公路太平隧道施工过程中揭露出特大型干溶洞,溶洞横穿左、右两幅隧道,沿隧道走向长约139m,宽约79m,体积约4.3×105m3,给隧道施工带来极大困难,隧道运营安全亦可能存在较高风险。通过对溶洞区的现场地质调查,分析了溶洞工程地质、水文地质条件,归纳总结了溶洞发育特征。通过数值模拟方法分析了溶洞围岩稳定性,结果表明,现状条件下整体基本稳定,但长期运营条件下整体稳定性安全储备不足。在此基础上,结合地质条件探讨了溶洞演化趋势,分析其对隧道工程稳定性的影响,并提出处治建议。
During the construction of Taiping tunnel in Yidu to Laifeng Expressway,an extra large-scale dry karst cavern was exposed,traversing the left and right tunnels,with volume of about 430,000 cubic meters.The length of the cavern along the tunnel is about 139 m and the width is about 79 m,which makes tunnel construction become extremely difficult,and there may be high risks on safety during tunnel operation.Through the methods of on-site geological survey,engineering geological and hydrogeological conditions of the karst cavern were analyzed,and the development characteristics of it were summarized.Stability of karst cavern surrounding rock is analyzed,by numerical simulation.The result shows that surrounding rock is basically stable in current situation,while the safety reserve is insufficient in the long-term operating situation.Based on above,the evolution trend of karst cavern is discussed according to geological conditions,the influence on the stability of tunnel engineering is analyzed,and the treatment suggestion is proposed.
作者
王章琼
柯茂东
张兵
李元松
王亚军
WANG Zhangqiong;KE Maodong;ZHANG Bing;LI Yuansong;WANG Yajun(School of Civil Engineering and Architecture,Wuhan Institute of Technology,Wuhan,Hubei 430073,China;CCCC Second Highway Consultants Co.,Ltd.Wuhan,Hubei 430052,China)
出处
《中国地质灾害与防治学报》
CSCD
2019年第4期48-53,共6页
The Chinese Journal of Geological Hazard and Control
基金
湖北省教育厅科技计划项目(B2017058)
关键词
公路隧道
溶洞
岩溶隧道
发育特征
洞室稳定性
highway tunnel
karst cavern
karst tunnel
developmental characteristics
stability of underground cavern
