Research on the Stability of Surrounding Rock During Tunnel Excavation Based on FLAC3D
In view of the complex stress field and displacement field generated during the construction and excavation of the tunnel,the numerical simulation is carried out by using the FLAC3D 6.0 three-dimensional finite difference software.The Drucker-Prager criterion is used as the plastic yield criterion of rock mass in the stratum,the distribution laws of tunnel stress field and displacement field after tunnel excavation and support are obtained through the calculation,and the key position of tunnel support is determined.The results show that,the support can inhibit the expansion of stress and displacement,and significantly improve the bearing capacity of the surrounding rock.
Construction and excavationSurrounding rockInitial supportSecondary lining of tunnel
万方数据
维普
