Study On Stability Analysis And Rational Support Technology Of Weathering Accumulative Slide

Landslide stability analysis is the core issue of the landslide engineering research field.This article relies on the landslide of Huangling No.2colliery which is the typicalweathering accumulative slide, expatiates on its basic characters, influencing factors,formation mechanism and the stress distribution characteristics. According to Fellenius,Janbu and Carry-over factor of limit equilibrium methods which are used to analyze andcalculate the landslide stability, we have analyzed three measures’ differences andapplication conditions in the weathering accumulative landslide stability analysis. Thecorresponding slide supporting scheme is suggested combining the stability analysis results.Also the correlative construction technics have been introduced, and the slide monitoringresults have been analyzed. According to the above comprehensive analytic study, the mainachievements are as follows:(1) The main influencing factors of the weathering accumulative landslide’s formingand development are its stratal configuration, geologic structure, landform, water effects,human activity and vegetation effects.(2) According to the analysis of slide’s formation mechanism and the stress distributioncharacteristics, it can be seen that there are three transmutation stages during the forming ofthe slide: the self weight consolidation creep stage, sliding surface gradually shaped stageand recent deformation stage, and every stage has its deformation damage characteristics.The slope shallow surface layer’s stress value is in the low value distribution. The toe of sideslope and the slope’s different parts have a certain extent of stress concentration anddifferentiation.(3) According to contrastive study of Fellenius, Janbu and Carry-over factor of limit equilibrium methods, it can be known that Fellenius is applied to the homogeneous soilslope’s stability analysis. And for the composite sliding surface of landslide, Janbu is muchmore in line with the actual situation of landslide. Carry-over factor of limit equilibriummethod can be used to slide whose sliding surface is polygonal line. In the stability analysiscalculation of weathering accumulative landslide, the calculated results from the carry-overfactor method can be the basis for stability evaluation.(4) This article has made the analysis and the evaluation for the landslide stability fromqualitative and quantitative aspects. In natural condition, the slide can be in the state ofunder stability~basic stability. And in rainstorm condition, the slide can be in the understable state, if there is no shoring, the needs of construction slope’s overall stability cannotbe met.(5) The combinative manner of retaining structure and drainage combining the slopeinside and outside during the research of slope shoring methods have been used to landslidepreventive treatment. The shoring methods of miniature (anti slide) pile and anchor cableribbed wall have the effect of controlling the slide’s deformation, drainage system projecthas the effective function of drainage, and restrained water’s adverse impact towards theslope stability. It is indicated from the monitoring results that the landslide has already beenin the stable state, and the governance has had the good results.