Analysis With DEM-FEM On The Stability Of Rock-Soil Mixture Slope

At present, the finite element method has grown up after decades of development, and it has been applid widely. Since the finite element method, which is based on continuum mechanics can not be used in handling the micro features of rock-soil-mixture slope. Resently, the discrete element method has been more and more focused on by scholars both at home and abroad. Since the discrete element method, which bases on discontinuous media can simulate the fragmentation of a geotechnical slope. However, the computational costs of DEM simulation is very expensive. In order to combine advantages of DEM and FEM, we adopt the multi-scale method with DEM and FEM.This article works on the numerical simulation of the slope with finite element method and discrete element method, respectively. The stability of the rock-soil-mixture slopes are analyzed also. The present work can be summarized as followed:1. We analyzed the stability of rock-soil mixture slope in quasistatic case and dynamic case, and discussed rounding rock effect of the rock-soil mixture slope and the effects to the stability of rock-soil mixture slope in different distributions of the rock blocks.2. We analyzed the stability of geotechnical slope with discrete element method, and improved the judgement rule of geotechnical slope stability based on discrete element method.3. The programs of computing the macro stress and Cundall’s best-fit strain of DEM are compiled. We obtain the stress and strain contours of the soil slope.4. The feasible multi-scale methods with DEM-FEM of rock-soil-mixture slope are discussed. After the stability analysis of rock-soil-mixture slope with FEM, we replace the unstable region with DEM. The physical quantity is transmitted between the two regions by fitted particles.