Process Simulation of Saleshan Landslide based on CDEM

• 1、School of Civil Engineering and Mechanics,Lanzhou University,Lanzhou,Gansu 730000
• 2、Key Laboratory of Mechanics on Disaster and Environment in Western China of Ministry of Education, Lanzhou University, Lanzhou, Gansu 730000

Abstract：The particle flow code using continuum-based discrete element method (CDME) , compared with field reconnaissance and laboratory test , is adopted to simulate the high-speed long-distance Sale mountain landslide process in Dongxiang County, Gansu Province. The integral movement process of landslide, which renewed from the old landslide triggered by creep deformation of lower sliding mass, is studied. The form of landslide deposit obtain from simulation is almost consistent with the actual situation, the analyses of movement, velocity and acceleration in the upper and lower part of landslide and trace point shows that: (1) The Sale mountain landslide is a tractive landslide. (2) the upper sliding mass have a higher velocity while the lower part moving a farther distance. (3) the movement process of land slide can be divided into five stages-lower parts starting stagProcess Simulation of Saleshan Landslide based on CDEMe, lower parts accelerating-upper parts starting stage, lower parts uniform moving- upper parts accelerating stage, upper parts bumping deceleration- lower parts reaccelerating stage, overall deceleration self-stabilizing stage.

Keywords： continuum-based discrete element method (CDME) DEM Sale Mountain high-speed long-distance landslide movement process