引汉济渭秦岭隧洞下穿椒溪河段涌水原因分析

Reason Analysis of Water Gushing in Jiaoxi River Section of Qinling Tunnel for Han River to Wei River Water Diversion Project

为了查明引汉济渭秦岭隧洞下穿椒溪河段隧道涌水原因,在洞内使用了地震反射、红外探水物探超前预报方法;在洞外使用了高密度电法、放射性测氡综合物探方法。结合工程地质和水文地质调查情况,综合分析各方法对涌水段的异常特征,确定了隧洞涌水段响应特征为低电阻率、高氡气浓度、低波速及泊松比和低红外场异常,涌水段岩体具有较好的储水性和导水性。有效查明了隧洞涌水机制,为预防和治理涌水提供了依据。该文研究成果可供类似工程参考和借鉴。

In order to find out the Reason of the water gushing in Qinling tunnel under the Jiaoxi River section of Han River to Wei River Water Diversion Project,the seismic reflection method and advanced prediction method for infrared water exploration geophysical prospecting method are used inside the tunnel,and the high-density electrical method and radioactive radon detection method are used outside the tunnel. Combined with the engineering geology and hydrogeological investigation,the characteristics of water gushing section by every geophysical method are analyzed. The response characteristics of tunnel water gushing are determined as low resistivity,high radon concentration,low wave velocity and Poisson’s ratio and low red field. The rock in water gushing section has good water storage and water conductivity characteristics. The tunnel water gushing mechanism is identified effectively,and it provides the basis for preventing and controlling the water gushing. The research result in this paper can provide reference for other similar engineerings.