西南某隧道岩溶水发育规律及涌水量预测  

On Development Law of Karst Water and Prediction of Water Inflow in a Tunnel in Southwest China

作　　者：张俊锋 李强 史永跃 吴磊[2] ZHANG Junfeng;LI Qiang;SHI Yongyue;WU Lei(Shandong Zhengyuan Geophysical Information Technology Co.,Ltd.,Jinan 250101;China Railway Southwest Research Institute Co.,Ltd.,Chengdu 611731)

机构地区：[1]山东正元地球物理信息技术有限公司,济南250101 [2]中铁西南科学研究院有限公司,成都611731

出　　处：《现代隧道技术》2021年第2期14-21,50,共9页Modern Tunnelling Technology

基　　金：四川省科技成果转化项目(2021ZHZY0014).

摘　　要：岩溶地下水是隧道施工中的一个关键水文地质问题。文章通过对渝昆高铁某隧道两侧的地表和钻孔调查,在关键地质点和水文点进行量测取样,并复核区内主要泉点、溶洞水及河流的流量,结合水质简分析和同位素分析结果,查明了隧址区可溶岩分布和岩溶发育规律,分析了岩溶水的赋存及补给、径流和排泄特征,理清了各含水层之间及其与地表水的水力联系。根据岩性和构造划分可能的集中涌水段、涌水量和风险等级,将隧址区划分为1个一级岩溶水系统和4个二级子系统,并将涌水危险性分为4个等级,隧道纯可溶的水平径流带为岩溶涌突水的高风险段。研究成果对隧道工程的设计、施工和运营具有较大的指导意义。Karst groundwater is a key hydrogeological problem in tunnelling.Based on the surface and borehole survey on both sides of a tunnel on Chongqing-Kunming high-speed railway,the measurement and sampling at key geological and hydrological points are carried out,and the water flows of main springs,karst caves and rivers in the studied area are rechecked.In combination with the results of water quality analysis and isotope analysis,the distri⁃bution of soluble rocks and karst development law in the tunnel area are identified,the characteristics of occurrence,supply,runoff and discharge of karst water are analyzed,and the hydraulic connections among aquifers as well as between aquifer and the surface water are clarified.The potential concentrated water burst sections,water inflow volumes and corresponding risk levels are classified according to the lithology and structure.The tunnel area is di⁃vided into one first-level karst water system and four second-level subsystems,and the water burst risk is classified into four grades.The pure soluble horizontal runoff zone of the tunnel is a high-risk section of karst water inrush.The study results are of great significance in guiding the design,construction and operation of tunnel projects.

关 键 词：渝昆高铁 岩溶隧道 涌水预测 风险等级 

分 类 号：U456.32[建筑科学—桥梁与隧道工程]