Nanning Basin Landslide Formation Mechanism Research Of Different Combination Strara

Nanning basin tertiary mudstone widely distributed, and the tertiary mudstone has many characteristics, such as softening, disintegration, swelling. Is composed of mudstone of landslide with rainfall landslides extremely easily, bring great harm engineering construction. So the nanning basin under different combination of strata sliding mechanism for predicting and tertiary mudstone in the governance of the landslide disaster has important significance.This paper collected nanning involving the tertiary mudstone landslide survey report nearly a century, statistical analysis in the physical and mechanical parameters, the tertiary mudstone and expansion parameters, as the parameters of the numerical simulation. At the same time according to the survey report will be nanning basin involving the tertiary mudstone formation is analyzed, simplifying the strata combination model, and on this basis, the finite element numerical simulation. Simulation of the slope after the rain, through the numerical simulation to find out the critical height of slope of different gradient, namely for steady state below this height, slope and above this level is extremely easily instability after rain. The corresponding critical height under different slope after fitting. Draw a slope under different model-the critical slope height curve.The parameters of the paper, on the one hand, summarizes the tertiary mudstone in nanning basin, can provide a reference for relevant construction. Paper, on the other hand, to map the slope under different model-the critical slope height curve, can offer important reference for engineering practice.