Analysis of Surrounding Rock Pressure of Deep Buried Tunnel considering the Influence of Seepage

This paper takes the surrounding rock of deep tunnel as research object and considers action mechanism under influence seepage. Based on Mohr-Coulomb criterion, stress buried is analyzed by a convergence constraint method. elastic-plastic solution, nonlinear solution interaction between lining structure considering effect seepage force proposed, radius plastic zone obtained. The relationship displacement, radial deformation lining, support reaction was observed. At same time, effects seepage, strain softening, intermediate principal stress, divided into residual zone, softening elastic distribution expressions each circular are derived. results show that with change nonuniform permeability coefficient, shows anisotropy in different directions, closer to horizontal or vertical direction, more obvious coefficient pore water pressure distribution. Seepage material have field size zone. Material unfavorable stability than has significant impact tangential rock. When not considered, calculation relatively conservative cannot give full play strength effectively. conclusion can provide theoretical reference for studying excavation water-bearing