三峡库区雪花坪滑坡变形破坏分析及演化规律研究

Study on Deformation Failure Analysis and Evolution Law of Xuehuaping Landslide in Three Gorges Reservoir Area

为探究三峡库区雪花坪滑坡的演化规律以及三维变形破坏分析,通过Geo-Studio数值分析软件对雪花坪滑坡进行网格划分得到计算模型。然后,根据有限元软件(Abaqus)模拟了雪花坪滑坡在各种工况条件下的变形破坏过程,得到了滑坡应力场和位移场的变化规律,并对雪花坪滑坡的位移和应力变化特点进行了计算分析。分析结果表明:雪花坪滑坡在工况三的条件下,滑坡的中后库水位的升降对滑坡的变形均有明显影响,其中滑坡中后部滑带较前缘滑带陡,破坏的范围较前缘大。

In order to explore the evolution law of Xuehuaping landslide of the Three Gorges reservoir and analysis the 3D distortion and destruction,this paper first studied the constitutive model and yield criterion of Xuehuaping landslide.Secondly,based on GEO-SLOPE software,the main longitudinal slope of Xuehuaping landslide was divided into finite element meshes with quadrilateral elements.After that,the process of distortion and destruction of Xuehuaping landslide under certain conditions was simulated by Abaqus.On the basis,the variation and characteristics of the stress field and displacement field of Xuehuaping landslide were described;this paper also researched the displacement and stress variation of Xuehuaping landslide.The results show that the change of upper reservoir water level would obviously influence the distortion of Xuehuaping landslide under the second condition,and the postmedian of sliding belt shows steeper morphology and has large damage area than front part of sliding belt.