Mechanism and stability analysis of typical landslide in pecan planting area of Ningguo City in Anhui Province:A case study of Shilingcun landslide
Ningguo pecan planting area is one of the most vulnerable areas of landslide disaster in Anhui Province with complex environmental and geological conditions,active human activities and abundant rainfall.The land-slide in Shilingun in the eastern part of the planting area was selected as the research object,and the remote sens-ing,topographic survey and geological exploration were adopted to investigate the deformation characteristics,for-mation conditions,failure mechanism and stability of the landslide in detail,and prevention and control proposals were put forword.The results show that Shilingcun landslide is a small composite soil landslide controlled by the interface of foundation and cover.The stability coefficient is 0.854 3(stability coefficient＜1,unstable)under condition Ⅱ(dead weight+continuous heavy rain),and it is in a creep state with greater possibility of resurrec-tion.The main controlling factors are weak rock and soil structure and suitable topographic and geomorphic condi-tions,and the induced factors are heavy rainfall and human engineering activities.It is suggested that the natural slopes in the planting area should be treated with engineering method,the picking pecans method should be changed(such as using low-altitude hanging net picking)to restore vegetation and reduce soil erosion.The re-search results could provide important reference for the early identification,prevention and control of landslide disasters in planting areas and reduce the loss of people's lives and property.
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