三峡库区某古滑坡稳定性数值模拟研究

Numerical Simulation Study on Stability of an Ancient Landslide in the Three Gorges Reservoir Area

文中以三峡库区某古滑坡为研究对象,通过选择典型断面,对其进行稳定性计算,并利用Geo-slope和FLAC^3D软件进行数值模拟分析。结果表明,此古滑坡可能分别沿浅层和深层2条滑动带产生滑动,且最危险潜在滑面与浅层滑带位置一致,其剪出口位于滑体与基岩接触面,后缘位于碎块石土与碎裂岩界面附近,与实际观测到的宏观断续裂缝位置基本吻合。

Taking an ancient landslide in the Three Gorges reservoir area as the research object,the stability of an ancient landslide is calculated by selecting a typical section,and the numerical simulation analysis is carried out by using Geo-slope and FLAC^3D software.The results show that the paleo-landslide may slide along the shallow and deep sliding zones respectively,and the position of the most dangerous potential sliding surface is the same as that of the shallow sliding zone,and its shear outlet is located at the interface between the sliding body and bedrock.The trailing edge is located near the interface between clastic soil and clastic rock,which is basically consistent with the observed macroscopic intermittent fracture position.