PHYSICAL MODELING AND NUMERICAL SIMULATION OF DEFORMATION AND FAILURE PROCESS OF LARGE ROCKSLIDE IN EARTHQUAKE

Earthquake is one of the main factors of the generation of a landslide. This paper takes the Daguangbao rockslide triggered by the Ms 8.0 Wenchuan earthquake for example. Based on site investigation, the physical model experiments and numerical model are built to simulate the deformation and failure process of the rockslide. The results of model test match the results of numerical simulation well. The results show that failure model of slide was that the toe and the middle of the slide was shear failure and the top of the slide was tension failure. The tension cracks of slope and the shear oblique layer on the bottom composed the slide boundary. Through the research of acceleration and velocity response, the calculated also resulted that the structural plane played a controlling role in the dynamic response of the rock slope.