Analysis Of Stability And Support Of High Soil Slope In East Branch Highway Of Kunming

The development of highway constructed in the massif that terrain and physiognomy is very complicated, There appear many problems in the course of investigating, designing and constructing. Among them, the high soil slope because of digging is a typical example.Comparing to low slope, the mechanism of transform is more complicated, and there are several main breakage form : the erosion of slope, collapse, landslide and erosion of surface.In this paper, the author researchs high soil slope in east branch of KUNMING.In the course of researching , the author optimize the shear strength parameter on the basic of mastering the engineering geological condition .At the same time , the author analysis, imitate and evaluate the stability of slope with the engineering geological method,limiting equilibrium method and strengthing reduction technique.After, optimize the slope gradient, design and imitate the supporting structure.This thesis detailedly analysis and discuss the Fast Lagrangian Method based on strength reduction technique, this method does not need to suppose the shape and position of sliding plane, the safety coefficient of the slope compatible with the calculation result of the limit equilibrium method, the most dangerous sliding plane is a sliding zone in the width, more fit to actual.So the method can apply to the stability analysis of high soil slope.This thesis detailedly analysis the soil arching effect and the effects of factors with numerical analysis, with the increasing of the space between frame beam, the soil arching effect is be lower,and the author analysis the shape of arching.