Study On The Relationship Between Slope Geometrical Morphology And Landslide Collapse Disasters In Yan’an

As the development of society economy,human’s engeneering activities were graduallyintensified,making the fragile geological environment of Yan’an became more wrose,leadingthe happening of landslide and collapse hazards more frequently,causing a great threat for thelocal economic development and people’s life and property security.In order to prevent andreduce the damage by geological disasters such as landslide,and completing the research workof “Study on the development features and distribution of geological disasters in Yan’ancity”,the author carried out a research on the relationship between slope geometricalmorphology and landslide,collapse disasters in Yan’an.According to the statistical datas of the geological disasters by detail survey in Yan’an,based on the stratigraphic structure,mechanical properties and sizes, this paper settled andclassified the geological disasters such as landslide,collapse,unstable slope,summarizing thedevelopment features of these disasters.For researching the spatial distribution of landslide hazards formation in Yan’an,this paperclassified and studied the development features of the slope geometrical morphology underdifferent statum stuctures,different water conditions and different forms of human activity.According to the statistical analysis of the quantity and proportion of landslide,collapseand untable slope in different slope geometrical morphology,discussing the control functions tothe geological disasters by slope type,angle and height.Then summarizing the correlation rulesbetween slope geometrical morphology and landslide,collapse disasters.In order to father clarify and validate the slope type,angle and height’s control functionsto landslide disasters,this article uses the Midas finite element simulation software,simulatingthe loess slope stability under different slope type,angle and height,analysis on the changes ofevery factor impact on the safety coefficient and the stress-strain distribution in the slope.Atlast,compared the results with the actual survey,and confirmed each other.Through the above research,the conclusion has a certain reference value for the geologicaldisasters risk regionalism and preverntion treatment work.