Analysis of Surrounding Rock Deformation in Shallow Tunnel Considering Pore Water Action
In order to study the deformation law of surrounding rock of shallow buried tunnel under the action of pore water,taking Pancheng Tunnel in Pingliang City,Gansu Province as an example,a three-dimensional numerical model of shallow buried tunnel is established by using FLAC3D finite difference software,and the changes of vertical displacement(roof subsidence)and horizontal displacement(side wall approach)of tunnel surrounding rock with pore water pressure are analyzed.The maximum roof subsidence and side wall movement under different pore water pressure coefficients are obtained.The numerical simulation results are applied to the construction of the shallow buried rich water tunnel in Pancheng,and the tunnel roof subsidence and side wall movement are controlled within the safety range required by the code,which provides theoretical guidance for the construction of the right line of Pancheng tunnel.
shallow buried tunnelpore water pressurenumerical simulationroof subsidenceside wall approach
万方数据
维普
