Stability Evaluation of Soil-rock Interface Landslide in the Hilly Area Under Rainstorm Condition:A Case Study of the Highland Area in Zhenjiang City
Landslide in the hilly area of Zhenjiang city has the characteristics of a double-layer structure of"soil above and rock below",and the topographic characteristics are generally steep on the top and slow on the bottom,forming good catchment conditions,which is the main type of landslide in this area.In order to grasp the characteristics and development trend of this type of landslide,on the basis of field survey and monitoring,the characteristics,formation mechanism and failure mode of landslide were ana-lyzed in DE and EF sections of typical areas in the study area,and the stability of landslide was compre-hensively evaluated by Bishop method.The study found that the soil-rock interface landslides in the hilly area are mostly developed around the mountain.The overall landslide is thin in the front and rear edges and thick in the middle.The landslide scarp and the periphery of landslide are clear,and the scale is dominated by small landslides.Rainfall and artificial slope cutting are the main inducing factors of soil-rock interface landslide.Under the condition of rainstorm,the shear strength of the upper soil layer is ob-viously reduced,and it is easy to slide down along the weak structure under the action of gravity and ex-ternal force to form landslide.At the same time,reasonable suggestions are given for obtaining geotechni-cal engineering geological characteristics in the region,which has certain reference significance for the stability evaluation of soil-rock interface landslide.
hilly landformsoil-rock interfacelandslide characteristicsevaluation of stabilityBishop method
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