Influence of dip directions on the main deformation region of layered rock around tunnels
作者单位：Key Laboratory of Engineering GeomechanicsInstitute of Geology and GeophysicsChinese Academy of Sciences
会议名称：《中国科学院地质与地球物理研究所2014年度（第14届）学术年会》
会议日期：2015年
学科分类：081406[工学-桥梁与隧道工程] 08[工学] 0814[工学-土木工程] 082301[工学-道路与铁道工程] 0823[工学-交通运输工程]
基 金：financially supported by the program "Research for the stability of surrounding rocks and control technology in tunnels" by the Economic and Planning Research Institute of the Ministry of Railways China(No.2009G005-A)
关 键 词：Dip direction Main deformation region Intersection angle Advancing direction of tunnels Layered rock
摘 要：The influence of dip directions on the main deformation region of layered rock around tunnel is studied using a 3D distinct element code called *** learn that the main deformation regions around tunnels are regularly changeful along with different intersection angles between dip direction and advancing direction of the *** specific deformation regions can be anticipated based on detailed engineering geological survey before tunnel ***,the common deformation pattern around tunnels is found to be structural deformation including bending and slipping of layered *** main deformation region is prone to occur at the region where the normal direction of rock layer points to the inside of tunnel because the minimum tensile strength of bedding plane appears on this region and rock bending is generally easier than rock *** understanding of the main deformation regions around tunnels provides critical information for selecting the route of a tunnel,forecasting the main deformation region and designing an efficient support system.