Stability Analysis Of Landslide Under Earthquake Loading

Seismic landslide is the secondary disaster induced by earthquake,the earthquake occurred in May 12th,2008 caused serious damages to rock and soil structure of mountain slope in Sichuan area.After that,accompanied by heavy rain or earthquake disaster,Seismic landslides had occurred in a large range,are very serious,which is more serious than the direct consequences of earthquake damage.This paper is based on the three Landslide Exploration Project induced by rainstorm and earthquake in May 12rh,2008,carrying out the analysis of landslide stability under seismic load.In this paper,by means of field research and exploration,finding out the distribution and scale,the main triggering factors,changes in the stability and development trend,the failure characteristics of the Sanjiaoxiang landslides.Put forward the physical and mechanical parameters of landslide correctly,and using the limit equilibrium method to calculate the stability of landslide.Based on the numerical model,using slope/w module in GEO-SLOPE of the Geo-Studio numerical simulation method,pseudo-static method and dynamic analysis method to simulate he seismic safety coefficient and the factor of safety in natural conditions and to determine the most dangerous sliding surface of landslide slope under the seismic acceleration in 0.1g,0.]5g,0.2g,0.4g.By the use of quake/w module in the GEO-SLOPE,the stress and strain of the landslide slope were calculated and analyzed to obtain different seismic slope displacement load,stress and strain nephogram,the comprehensive analysis of the slope stability state.Based on the characteristics of the landslide slope,put forward a comprehensive controlling project,make the management and preliminary design of project,sum up the stability and the sensitive factors of landslide,illustrate the development trend of the landslide,and thus provide a landslide prevention recommendations and its impact on the environment and the prevention and treatment of benefits assessment.This provides a theoretical basis for the Sanjiaoxiang landslide prevention and control engineering design and construction.