Research On The Formation Mechanism Of Landslide On The Left Bank Of Bahe River In Xi＇an

the the research object of the paper is the landslide group of left bank of BaHeRiver. According to the landslide area geological environment background,I studiedthe distribution characteristics of regional landslide from two aspects of time andspace and study area were classified according to the different standards,and thedevelopment characteristics were described from five aspects. Then,I selected thetypical landslide-ChengDongPo landslide as the research object,and analyzed thefactors affecting the formation of landslides,and described the process of evolution ofthe landslide topography, based on the study of environmental geology backgroundand on the developmental characteristics of landslide. After that, I made comparativeanalysis on undisturbed soil and sliding soil from the material composition, physicalproperties, mechanical properties and microstructure test, etc. I established thelandslide formation mechanism based on the composition of contrast material,mechanical properties and micro-scale, which is the focus of this study. Stability ofthe landslide was analysised in brief.In this paper, from the macroscopic and microscopic two research perspective,with the paramount task of comparative study of the undisturbed soil and sliding soil,the landslide formation mechanism based on the composition of contrast material,mechanical properties and micro-scale was put forward. Research ideas and methodsused in this paper has certain reference value in the similar situation. Meanwhileresults of this study,have some practical effect on the prevention and treatment oflocal landslides.