摘要
EH4是一种轻便、可靠、适用于山区隧道勘探的大地电磁系统,使用该系统能有效发现隧道内岩溶地质灾害。在铁路、公路等工程实践中,EH4反演结果中低阻异常体对岩溶的指示效果良好,但其反演结果中的高阻形态的异常体容易被当做完整基岩而忽略。结合湖北恩施太平隧道和雷家坪隧道的EH4资料和开挖验证情况,说明EH4发现岩溶空洞的有效性和可靠性。
EH4 as a portable, reliable magnetotelluric system applicable to tunnel exploration in mountainous areas has been proved to be an effective system to discover karst geological disaster in tunnels. As to railway, highway and other engineering practices, the low resistivity anomalous body in the inversion result of EH4 has good behavior on karst indicating, while the high resistivity anomalous body therein is prone to be deemed as intact bedrock and then to be ignored. Based on EH4 data of Taiping Tunnel and Leijiaping Tunnel in Enshi, Hubei, and the excavation data, the effectiveness and reliability of EH4 to discover karst cavity have been verified.
作者
闫海涛
陈锋
张龙
张超
YAN Haitao;CHEN Feng;ZHANG Long;ZHANG Chao(CCCC Second Highway Consultants Co., Ltd., Wuhan 430052, China)
出处
《路基工程》
2019年第6期165-169,共5页
Subgrade Engineering
关键词
大地电磁
隧道
地质勘察
岩溶
EH4
magnetotelluric
tunnel
geological investigation
karst
EH4
