变质软岩深埋特长隧道综合地质勘察方法探讨

Research on Method of Comprehensive Geological Survey for Deep Buried Super Long Tunnel in Metamorphic Soft Rock

以十堰至巫溪高速公路鲍峡至溢水段鸡公寨隧道工程为依托,通过采用大面积地质调绘、岩性与构造专项调查、综合物探、钻探、综合测试与试验等勘察方法,查明了隧道深部的围岩条件和地质构造特征,获得了隧道围岩分级与稳定性计算所需参数,分析了地应力对隧道围岩变形的影响。

Based on Jigongzhai tunnel of Baoxia to Yishui section in Shiyan to Wuxi highway, through the adoption of large area geological annotation, lithology and tectonic special survey, comprehensive geophysical prospecting, drilling, comprehensive test and experiment, the conditions of the surrounding rock and the geological structure characteristics of the deep tunnel are found out, the parameters required by tunnel surrounding rock classification and stability calculation are obtained and the influence of ground stress on tunnel surrounding rock deformation is analyzed.