The Analyses Of Stability Of Beidongqu Landslide, Yanan, And Its Project Optimazition

China suffered natural hazard frequently.With the increasing engineering activities,more landslides would be produced,which might bring tremendous damage to human beings.Landslide is a sophisticated dynamic system,also large scale landslide possess profound destructive effects.Every year hundreds of people died for landslides,the economic lose is even more than millions of dollar.Yanchang Country,Yanan is one of the counties which suffered geological hazarad most in Shanxi.In that county,the slopes are steep;the layers of soil are thin;geological structure is complex;deep fracture developed;rock mass are fragementized geological environment is relatively bad.That country often suffered landslides,collapse,mud-rockflow,which cause great harm to human beings and properties.The geological hazard has already became a critical element that restrict the economic and social sustainable development of Yanchang Country.This paper analyzes the hazard risk,influence element,stability evaluation;then proposes two methods to treat landslides,and chooses the proper one based on comprehensive analysis.In this paper,the author based on the project of Beidongqu Landslide,Yanan,Shaanxi,China,systemically research the engineering geological condition,basic characteristics,stability analysis and dynamic comprehensive treatment method,etc.The major contents are as below:1.The landslid formation geological environment background,the characteristics of the landslide and the forming condition of landslide;2.With the combination of qualitative and qualitative method for landslide stability analysis,qualitative analysis of transfer coefficient method is used to analyze the stability of landslide;3.Using the ahp fuzzy method for landslide prevention plan optimization...