【摘要】 岩溶山区的隧道工程建设中,隧址区的岩溶管道连通性对隧道设计中涌水量、水压力等指标的确定以及隧道施工防灾具有重要意义。以宜万铁路八字岭隧道为例,系统分析了岩溶管道粗颗粒沉积物的粒度、岩石及矿物成分、圆度度组合等特征,通过对比分析,探讨了碎屑沉积物的地质联系,研究了沉积物的来源,以此为基础分析了隧址区岩溶管道的连通性,为工程设计施工提供参考。更多还原

【Abstract】 In the course of the tunnel construction at the karst mountain area,the karst conduit connectivity has a great importance to determine the quantity of welling water and water pressure,and to protect the tunnel construction.This paper presents a case study during Baziling tunnel construction of Yiwan railway.It systematically analyzes the characteristics of grain size,the rock and mineral’s component,roundness of karst conduit deposits.It applies the theory of sedimentation to study hydraulic characteristic of fragmental deposits.Finally it examines the source of the deposits.According to this result,it analyzes karst conduit connectivity of thee area,and provides the references for the design of the tunnel construction.更多还原