Dynamic And Stability Of Landslide Under Earthquake Loading

Seismic landslide is the secondary hazards of earthquake. When an earthquake occurs, the induced landslides, avalanches, landslides and other secondary disasters, are very serious, which is more serious the direct consequences of earthquake damage, while the occurrence and development of seismic landslide are related to many factors, there is not yet a given fundamental solution.This thesis is based on complete investigation of landslides along Cheng-Lan railway in th e high intensity earthquake area, through analysis of earthquake risk to determine the subarea of earthquake intensity, and evaluate the security of the landslide under earthquake. Survey t he landslide point along the railway, and find out the landslides which are closely related wit h the project, and taken Balanggou landslide near Jiuzhaigou station as study object, through in-field exploration and research, analyze the conditions of environment geology of Balangg ou landslide, and analyze, calculate and evaluate the stability of the landslide. We adopted Q uasi-static method and dynamic finite element method to analyze the stability of the landslid e. And we used SLOPE/W module in GEO-SLOPE software to calculate the safety factor un der nature and earthquake state, and determined the most dangerous slip surface, and obtaine d timing diagram of safety factor by dynamic finite element analysis. In the QUAKE/W mo dule and ANSYS software, simulate the stress-deformation situation, and obtain the cloud m ap of displacement, stress and strain under different earthquake live loading, and comprehens ively analyze and evaluate the deformation during the earthquake period, and obtain the chan ge law of landslide stability under different peaked earthquake live loading. This thesis analy ze the stability of the landslide from stability, deformation characteristics and stress field, an d know the relationship between earthquake stress and stability of landslide, and evaluate the current situation of the landslide, and analyze the characteristics of increment of shearing str ain and displacement. Above all provided the theoretical foundation of antiseismic engineeri ng of Balanggou landslide near Jiuzhaigou station along Cheng-Lan railway.