Stability Analysis Of The Yexinglin Loess Landslide In Yili Based On Numerical Simulation Of FLAC3D

The Loess landslide in Yi li area has seriously affected the local transportation,hindered the economic development and caused great threat to people's life and property.In order to reduce the frequency of the loess landslide or reduce the destruction of the loess landslide brings to the human,the need to establish an effective early warning and protection measures,which in the early period of the important conditions is necessary to analyze loess landslide stability evaluation.In this paper,the loess landslides in the Yexinglin in Xinyuan County of Yili are taken as the research object.Based on the field investigation,site observation and regional geological data collection,the natural geography and geological conditions of the study area are summarized.Through field investigation,pit sampling,laboratory analysis and test data,the basic laws of physical,water rational and mechanical properties of Yexinglin Loess in Yili area are obtained,which can provide reference data for later numerical simulation.Then,Based on the preliminary work,the basic characteristics of the loess landslide of Yexinglin are summarized from the features of topography and landform,spatial morphological features,types of landslide,structural characteristics and hydrogeological features.Mainly from the topography,formation lithology,precipitation,earthquakes,human activities and other factors to describe the Yexinglin loess landslide genesis mechanism,Yexinglin loess landslide formation belongs to the creep-pull type.At the end of the analysis of the stability of the Yexinglin loess landslide,the qualitative stability analysis is carried out briefly from the features of topography and geomorphology,geological structure,landslide boundary conditions and the change of sliding displacement.Secondly,the stability of the Loess landslide is quantitatively calculated by using the transfer coefficient method in the limit equilibrium method and the flac3 d finite difference numerical simulation method respectively.In the transfer coefficient method,the safety factor of the Loess landslide in the natural,rainfall and seismic conditions is calculated by explicit method and implicit method.The FLAC3 D software is used to simulate the loess landslide in the natural and rainstorm conditions,the stability of the Loess landslide is analyzed in detail,and it is concluded that the Loess landslide is basically stable in the natural state and unstable under the rainstorm condition.Through the research of this paper,it can provide scientific reference for the analysis and research of similar loess landslide stability in Yili area,and provide reliable basis for the formulation of effective prevention and control measures of loess landslide and monitoring and early warning system.