Three-dimensional finite element numerical simulation of geo-stress in Da-Li Railway tunnel of Yunnan

Through the measurements of geo-stress in-situ,the crustal stress state in the region of the tunnel was determined(including the value and direction of in-situ stress).According to the measured in-situ stress state,the mechanical parameters of rock mass around the tunnel and the regional engineering geological conditions,the in-situ stress distribution in the engineering region was determined by the three-dimensional finite element method.