Abstract:Taking a slope as an example, the modeling process of the slope stability evaluation of the physiotic rock mass has been discussed in detail by using finite metasoftware ABAQUS. In ABAQUS, a simulated section group with a certain thickness and low strength solid unit has been used, which is treated according to continuous medium, and the contact between the section group and the rock block is created to simulate the unstable state by continuously reducing the strength parameters of the structural surface. By analyzing the relationship between the displacement in X direction and the typical particle field variables at the top of the slope, the safety factor of non convergence of numerical calculation is 1.41，the safety factor is 1.32 when the apparent displacement of the particle at the top of the slope is taken as the instability criterion. The two criteria indicate that the slope is in a stable state at present. Based on the PEMAG integral equivalent plastic strain zone evolution diagram, the sliding surface under strength reduction state is simulated, sliding faces are intuitive and physically significant, eliminating the need to preassume the position and shape of the sliding faces as with extreme balancing.
