A large bedding rock landslide was failure in 2020 induced by heavy rainfall along the G326 National road in Shiban Village,Songtao Miao Autonomous County,Guizhou Province.After a field investigation of the deformation and failure characteristics of the landslide,the causing reason of the heavy rainfall for the landslide sliding was analyzed.The Material Point Method(MPM)is used to simulate the run-out process of the landslide,and the changes of the velocity and impact load of the landslide are gained.The results show that the landslide is a medium-scale inclined bedding rock landslide induced by heavy rainfall on July 8,2020,and the sliding failure occurred about 3 hours after 4 o'clock on July 8 with the hourly precipitation of 96.2 mm.The MPM can simulate the run-out and accumulated process of the landslide,and the simulated results are basically consistent with the investigation.The simulated sliding speed maximum of the rock and soil mass is 27 m/s,and the kinetic energy maximum is 1.8×109 J in 15 s.Additionally,the maximum value of the impact force is 37.98×106 kN,which is located at about 230 m from the rear crown of the landslide.It has engineering reference value for risk prevention and control of similar landslide disasters along the National G326 road.
关键词
降雨滑坡/顺层滑动/运动过程模拟/物质点法/冲击荷载
Key words
rainfall-induced landslide/inclined bedding rock landslide/run-out process simulation/material point method(MPM)/impact force
万方数据