防灾减灾工程学报2016，Vol.36Issue(4)：551-558,608,9.DOI:10.13409/j.cnki.jdpme.2016.04.007
基于DDA方法的藕塘滑坡失稳模式分析
Research on Failure Mode of Outang Landslide Using DDA Method
摘要
Abstract
The Outang landslide,a typical large consequent bedding rockslide in Three Gorges Reservoir,is situated on the south bank of the Yangtze River at Anping Town in Fengjie County.The volume of Outang landslide is about 6.4 × 107 m3.In 2003,the 180～220 m platform at the front of the landslide was chosen as a new site of Anping Town,and protection engineering was implemented for shallow slide mass.But since October 2008,the deformations gradually emerged at pace with the first time of water storage in Three Gorges Reservoir.In 2013,the complete relocation of Anping Town was restarted by Fengjie County government.After investigating the physical characteristics,composition and monitoring data of Outang landslide,the Discontinuous deformation analysis (DDA) method is used to simulate the deformations of the landslide in natural state and rainfall state,the failure mode is studied by analysing the velocity of blocks in representative positions.Results show that the whole landslide remain basically stable in two states.If the mechanical parameters of the frontal part further decreased,the possibility of landslide along the top of bed rock is little for the rock-layer is reversed at the front,while there is possibility that the landslide will occur along a new inner potential slip surface.关键词
藕塘滑坡/非连续变形分析(DDA)/数值模拟/失稳模式Key words
Outang landslide/Discontinuous Deformation Analysis(DDA)/numerical simulation/failure mode分类
建筑与水利引用本文复制引用
江巍,陈玮,孙冠华,王彦海,郑宏..基于DDA方法的藕塘滑坡失稳模式分析[J].防灾减灾工程学报,2016,36(4):551-558,608,9.基金项目
长江科学院开放研究基金资助项目(CKWV2015212/KY)、国家自然科学基金青年基金项目(51409150)资助 （CKWV2015212/KY）
