The Analysis Of The Formation Mechanism Of Loess Slopes Under The Action Of Earthquake And Rainfall

Because of the special engineering geological properties, the slope of loess will be slide with the long time of rainfall, but a massive landslide is not simply caused by rainfall, it is always triggered by earthquake movements combined with rainfall. Baoji city in Shangxi province is a densely populated area with developed industry and agriculture, the loess landslide and the secondary disasters have a huge harm to the local economic and people’s life. So, it is essential to study on the deformation of loess slope under the earthquake movements and rainfall.This article select the Bojizhuang landslide group in Chencang district of Baoji city as the study object, use the field experiment and numerical simulation technology to study the deformation of loess slope with the earthquake and rainfall. The work carried out in this paper are as follows.(1) By simulating the seismic response in different loess thickness/slope height/slope angle and the actual terrain, to analysis the influence of topography on the acceleration magnified effect. And to analysis the deformation of the main slope in Bojizhuang caused by earthquake.(2) Combined with field testing and monitoring data to obtain the unsaturated hydraulic parameters in Baoji area, and provide the basis for the simulation of rainfall infiltration.(3) To analysis the deformation of the main slope in Bojizhuang caused by rainfall, and study the effect of different duration of rainfall to slope deformation.To analysis the deformation of the main slope in Bojizhuang caused by earthquake and rainfall simultaneously, and compare the results only caused by rainfall, study the effect of different duration of rainfall to slope deformation at the same time.