强富水地层隧道含水构造精细预报技术研究  

Study on fine prediction technology of water bearing structure in tunnel with strong water-rich strata

作　　者：王路[1] 张恒[2] 吴建文[3] WANG Lu;ZHANG Heng;WU Jianwen(Sichuan Vocational and Technical College of Communications, Chengdu 611130, China;MOE Key Laboratory of Transportation Tunnel Engineering, Southwest Jiaotong University, Chengdu 610031, China;Sichuan Engineering Technical College, Deyang 6180000, China)

机构地区：[1]四川交通职业技术学院,四川成都611130 [2]西南交通大学交通隧道工程教育部重点实验室,四川成都610031 [3]四川工程职业技术学院,四川德阳618000

出　　处：《铁道科学与工程学报》2017年第12期2661-2670,共10页Journal of Railway Science and Engineering

基　　金：中央高校基本科研业务费专项资金资助项目(SWJTU11ZT33);教育部创新团队发展计划资助项目(IRT0955)

摘　　要：锦屏水电站引水隧道群施工中面临高压大流量地下水,富水地段占隧道全长约40%,主要采取表面雷达、钻孔雷达及地震波CT 3种方法综合对地下水进行预报,在引入钻孔雷达后,预报隧道掌子面前方含水构造比一般物探方法要准确且直接得多。引水隧洞群工程自开工到全部洞室贯通4 a间,经过多次突涌水的考验,从典型断面突涌水实例可以看出:钻孔雷达与地震CT法相结合能够精细预报地下含水构造和岩溶分布范围,有效探测掌子面前方的不连续体,判断含水、破碎带情况,预报准确性高,效果良好。同时要重视地质分析,结合预报图件、地质资料、水文资料以及掌子面地质描述,开展综合细致的解译工作,才能更好地为地下水导排及安全预警提供设计依据。The construction of Jinping hydropower division tunnel group faces high-pressure flow of groundwater,and the water-rich area accounts about40%of the whole tunnel.The prediction of groundwater mainly adopts3methods,including surface radar,borehole radar and earthquake wave CT.After the introduction of borehole radar,it is more accurate and direct to forecast water bearing structure in front of the tunnel face than general geophysical methods.Within4years from the start to completion of diversion tunnels,it is found from several sudden water gushing that the combination of borehole radar and seismic CT can finely forecast water bearing structure and karst distribution range.The discontinuity in front of tunnel face can be detected effectively,as well as water cut and fracture zone.The forecasting accuracy is high and the effect is good.At the same time,more attention should be paid to geological analysis.Comprehensive and detailed interpretation work should be carried out in combination with forecast maps,geological data,hydrological data and geological description of working face,so as to provide a better basis for the design of groundwater discharge guide and safety warning.

关 键 词：隧道工程 强富水地层 含水构造 精细预报 

分 类 号：TU91[建筑科学—建筑理论]