Study On The Stability And Comprehensive Treatment For Expensive Soil Slope

There are a lot of expansive soil slopes which are found everywhere in the 106 national highway in Huangshi,most slopes have already collapsed and slided in various degree. Some landslides plug to the ditches which impact the drainage effect of the subgrade. Other landslides slip to the lane roads which cause the safety problems. According to this, the stability analysis and treatment of technical research for expensive soils slope have been studied in this paper.Through the general geological investigation on the spot that has been carried on by the slide slope and collapse,the geographical situation,geological formation and genetic analysis are got. The material composition,clay fraction and microstructure have been made clear through the phase analysis of clay mineral by X-Ray diffraction,chemical analysis,SEM analysis and laboratory experiment. On this basis,the soil property and geological features in engineering and the factors affecting stability of the expansive soil slope have been carefully analyzed and summarized to get the unsteady main reason, thus it laid the foundation of establishing the destroy mode and stability analytical method corresponding to reality and proposing the effective project in engineering.Analyzing the regularity of the slide slope and collapse, we find out the master sheet of the large slip. The text leads into FLAC procedure——a geotectonic engineering calculation software. We got the destruction mechanism when the internal stress field of the expansive soil slope which has been disturbed. Through the simulation of excavation and permeating ground water, the back of slope sinks, the horizontal skidding of the middle and front part are remarkable, the overall slipping characteristic is obvious.On the basis of analyzing the geological cause of formation of some expansive soil collapse and slide side slope,the paper tries to quantify the primary factors affecting the expansive soil side slope for example cranny and geologic setting and so on and put forward the expansive soil side slope stability forecasting method based on the gray clustering forecasting theory. At the foundation of summarizing the existed treatment experience of expansive soil slope both at home and abroad,and in view of the reality in the 106 national highway in Huangshi,the method of chemical addition and the method of protective cover of vegetation have been adopted to this project,they obtain good treatment result,economic effects and environmental benefit.