摘要
该文通过工程地质及水文地质调查,分析研究叙岭关场地岩溶发育特征及规律,制定隧道岩溶问题处治方案。研究表明隧址区受构造影响,溶蚀洼地、落水洞、溶槽等密集发育,并发育有完善的地下水系统。地下水系统由3条主暗河和若干次级暗河组成,主暗河的走向受南北向展布的背斜控制,次级暗河受背斜轴部非可溶岩顶面的控制。隧道处于垂直渗流带,施工中岩溶问题以竖向岩溶管道为主,不会产生大的涌水灾害,在可溶岩与非可溶岩界面附近可能受次级暗河管道的影响。通过施工开挖验证了岩溶地质分析推断结论,并根据地质分析确定了岩溶问题处治方案,经多年运行隧道未受岩溶地质灾害危害。
Based on the investigation of engineering geology and hydrogeology,the characteristics and regularities of karst development in Xulingguan site are analyzed,and the treatment scheme of tunnel karst problem is formulated.The research shows that there are dense karst depressions,falling water tunnels and karst troughs affected by geological structures in the tunnel site area,and there are well developed groundwater systems.The groundwater system consists by three main underground rivers and several secondary underground rivers.The direction of the main underground rivers is controlled by the N-S trending anticline,the secondary underground river is controlled by the top surface of non-soluble rock in the axis of anticline.The tunnel is located in the vertical seepage zone.The main karst problem in construction is vertical karst pipeline,which will not cause large water inrush disaster.It may be affected by secondary underground rivers near the interface between dissoluble karst and non-soluble karst.The conclusion of karst geological analysis is verified by construction excavation,and the treatment scheme of karst problem is determined based on geological analysis.After many years operation,the tunnel is not endangered by karst geological hazards.
作者
程强
钟勇
Cheng Qiang;Zhong Yong(Sichuan Highway Planning,Survey,Design and Research Institute Ltd.;Nuclear Industry Southwest Survey&Design Institute Co.,Ltd.)
出处
《勘察科学技术》
2019年第4期37-41,57,共6页
Site Investigation Science and Technology
关键词
叙岭关隧道
岩溶
特征规律
处治
Xulingguan Tunnel
karst
characteristics rules
treatment
