Stability Analysis of Wanzhou Jinjinzi Landslide in Three Gorges Reservoir Area
The slopes on both sides of the Three Gorges Reservoir area are easily affected by changes in res-ervoir water levels and rainfall,which can easily cause landslide disasters.Wanzhou Jinjinzi landslide is a typical wading type landslide in the Three Gorges Reservoir area,and the landslide body has been deformed continuously since the Three Gorges Dam impounded in 2003,and local deformation and damage occurred in 2016.Based on the field geological survey and engineering geological drilling data and GPS surface dis-placement monitoring data,the deformation characteristics of the landslide body are analyzed,and Geostu-dio software was used to carry out numerical sensitivity analysis.According to the analysis of landslide stabil-ity,the trend of landslide deformation is predicted.The results show that:although the whole Jin Jinzi land-slide is in a stable state under the condition of heavy rainfall,the shear strength of the soil in slip zone de-creases and the unit weight of landslide increases due to rainfall in the strong deformation zone,which in-creases slide-down force of and deformation of landslide body,and the landslide surface runoff further in-creases the slide-down force of landslide body,which leads to the instability and destruction of the strong deformation area.
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