| Mianxian located in Shaanxi Province in the southwest of the western end of Hanzhong city,North Habitat south slope,south Bashan Mountains,a variety of geological disaster-prone,which is one of Mianxian landslide disaster of major geological disasters,the expansion of landslide disasters in Mianxian landslide account for a large proportion,and the relative concentration of development,developmental area population density,frequent human activities,once the danger to life and property will cause great harm to the people of occurrence.This article first location Mianxian landslide area,engineering geology and human engineering activities were introduced.Secondly,on expansive soil landslide Mianxian data collection,field investigation,on the basis of field measurements,summed up the flat shape of landslides,sediment distribution and landslide type;by scanning electron microscopy,X-diffraction experiments,laboratory soil test and so on structure,mineral composition,mineral content and the relative expansion properties and shear properties of expansive soils were studied,and analyzes the influencing factors and causes of the mechanism of expansive soil landslide.Based on the qualitative analysis of the stability of the landslide,first,through software simulation of the stability of landslide expansion Mianxian a specific analysis.Secondly,GeoStudio software systems Slope/W subsystem,the probability of landslide damage stability calculations coefficients and instability,and then calculate the landslide thrust,as late Landslide basis.Finally,the two stability analysis comparing the results obtained on the analysis and evaluation of the stability of the landslide.Finally,based on the principle of prevention and control methods expansive soil landslide select multiple expansive soil landslide Mianxian example,combining practical engineering landslide,after scheme comparison argument,put forward a comprehensive governance program expansive soil landslide. |
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