引汉济渭秦岭隧洞突涌水原因及涌水量预测  

Causes analysis on water gushing and prediction of water inflow in Qinling Tunnel,Water Diversion Project from Hanjiang River to Weihe River

作　　者：郭熹 柴军瑞[1] GUO Xi;CHAI Junrui(Institute of Water Resources and Hydro-electric Engineering,Xi'an University of Technology,Xi'an 710048,China)

机构地区：[1]西安理工大学水利水电工程学院,陕西西安710048

出　　处：《人民长江》2019年第1期113-117,共5页Yangtze River

基　　金：国家自然科学基金项目(51679197);国家自然科学基金青年基金项目(51409208)

摘　　要：针对隧洞开挖施工中常见的隧洞突涌水等地质灾害问题,在分析隧洞涌水区域水文地质条件、有限元渗流计算和达西定律的基础上,研究秦岭隧洞椒溪河段开挖涌水原因并预测涌水量。研究表明:在涌水发生的初期,涌水集中渗漏通道由断层泥及断层角砾填充,发生的流动为渗流,通过有限差分软件数值计算求得的隧洞开挖初期涌水量与实际隧洞开挖涌水初始阶段的涌水量非常接近;在涌水稳定阶段,涌水集中渗流通道发生类管涌的水力破坏,通过集中渗漏通道流入隧洞内的流量为1 671.55 m3/h,与现场实测隧洞涌水稳定时的最大涌水量1 700 m3/h接近。研究成果可应用于水文地质条件类似的隧洞工程涌水量计算。Aiming at the problems of geological hazards such as water gushing caused by tunnel excavation in water-rich area,on the basis of hydro-geological condition investigation,finite element seepage calculation and Darcy's law,we analyzed the water gushing causes and predicted water inflow of Jiaoxi river section of Qinling Tunnel,Water Diversion Project from Hanjiang River to Weihe River.The results showed that in the water gushing initial period,the concentrated leakage passage was filled with fault mud and fault breccia,and the flow was seepage.The initial water inflow amount obtained by finite element numerical calculation was very close to the actual water inflow amount.In the steady period,for the piping failure occurred in the concentrated water leakage passage,the simulated water inflow was 1671.55m^3/h,closing to the actual maximum water inflow of 1700m^3/h.The research results can be applied to the water inflow calculation in tunnel engineering with similar hydro-geological conditions.

关 键 词：涌水原因 涌水量 集中渗漏通道 管道流 有限元渗流计算 秦岭隧洞 引汉济渭 

分 类 号：P642[天文地球—工程地质学]