| The analysis and evaluation of landslide stability is the main basis for judging whether the landslide is unstable,whether it needs reinforcement and what kind of protective measures are taken.Therefore,it is the most basic and most important problem in the landslide prevention and control project.In terms of landslide problems,we must first understand and understand the factors affecting landslides,make accurate stability analysis and evaluation of landslides,and develop feasible solutions and emergency measures for emergencies in the process of analysis.For the whole landslide project,we should determine the key factors and secondary factors from the whole to the local,and conduct test analysis on the factors that are particularly sensitive to the key factors,and determine the main factors affecting the stability of the landslide,which is of great significance to the whole governance project.The Shouniubei landslide is located in Jincheng Town,Yilong County,Nanchong City,about 2 kilometers from Jincheng Town.The housing of one household on the top of the slope collapsed,and the houses of two households were suspended and cracked.The nine residential houses were deformed and cracked to varying degrees.The S101 provincial road was cracked and the wrong section was about 30 m long.One house in the middle of the slope collapsed.The pig was buried and destroyed the village road(hardened by cement)about 350 m.At present,unstable slopes(landslides)have poor stability,especially the steep slopes on the trailing edge and the slopes on both sides.Under rainfall conditions,there is a high possibility of deformation.The life and property of 14 households with 81 persons,S101 provincial roads and villages The safety of pedestrians on highways poses a serious threat,affecting the normal production and life of local villagers.Therefore,in order to ensure the safety of the people's lives and property,it is necessary to carry out the stability evaluation of the landslide and carry out the engineering management of the landslide on this basis.Based on the field investigation and data collection and collation,this paper analyzes the natural geography and geological environment conditions of the landslide area,including the geomorphology,stratum lithology,geological structure,hydrogeology,geotechnical geological characteristics of the landslide area,Human engineering activities,etc.The boundary and deformation characteristics of the landslide,the material structure characteristics of the landslide rock and soil,and the hazard objects of the landslide are analyzed.According to the formation mechanism of landslide deformation,the development stage of landslide and the factors affecting the stability of landslide,the landslide formation is the formation of the landslide.The weak structural surface of the landslide has good conditions of surface condition,and the topography and stratum lithology Under the influence of factors such as rainfall,culvert leakage and artificial excavation(where rainfall is the main predisposing factor),deformation will occur,which will lead to local instability of the landslide.In this paper,the unbalanced thrust transfer coefficient method is used to analyze the stability under three different conditions of natural,saturated and natural +earthquakes.Based on the stability analysis conclusion,the corresponding comprehensive prevention and control scheme is proposed. |
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