Large-scale landslide movement simulation using an extended 3-D DDA with GIS support
Large-scale landslides have caused various catastrophic damage and fatalities worldwide.In order to make effective preventive countermeasures,it is very important and necessary to estimate the movement behaviors of landslide masses,such as velocity,run-out distance and deposit distribution after slope failures.Numerical simulations using discontinuous deformation analysis(DDA)are appropriate and effective in landslide movement analysis.Up to now,there have been many reports on applications of the two-dimensional(2-D)DDA method.However,because of the restriction of numerical simulation technology,few three-dimensional(3-D)simulations of large-scale landslide movement were performed by 3-D DDA.Therefore,this paper presents a new effective slope modeling method by incorporating the Geographical Information System(GIS)techniques into the original 3-D DDA program.Accordingly,the contact algorithm in the original 3-D DDA program is also extended to be capable of simulating free falling of landslide masses as well as sliding,rolling and bouncing on the new slope boundary.Additionally,the implementation of the new slope model and contact algorithm improves the efficiency of both contact detection and mechanical calculations.Finally,an application to a large-scale landslide with complex slope topography was provided to demonstrate its practical applicability.The results indicate that the newly developed 3-D DDA program with GIS support is an appropriate and effective tool for practical large-scale landslide movement analysis.
H.Zhang S.G.Liu G.Chen P.D.Jing L.Zheng Y.B.Zhang Y.Q.Wu
Tongji University, Shanghai, China Kyushu University, Fukuoka, Japan Sichuan University, Chengdu, China Southwest Jiaotong University, Chengdu, China First Crust Deformation Monitoring and Application Center, CEA, Tianjin, China
国际会议
The 12th International Conference on Analysis of Discontinuous Deformation(第12届非连续变形分析国际大会)
武汉
英文
242-252
2015-10-16（万方平台首次上网日期，不代表论文的发表时间）