The Study On Analyzing Stability And Treating Technique For Slope Engineering

The safety analysis of slope engineering is a hot researching spot of the geotechnical engineering field at home and abroad. The geologic condition of slope unstability is very complicated. Together with many uncertainty and action factor in slope slipping, geotechnical engineers can't totally understand the mechanism and can't obtain the evolvement process of body deformation in quantity nowadays. Today, it is a rather arduous assignment for controlling slope unstability, so it is very important to study stability and treating technique for slope deeply.The slope of the Linbao dahu mining area in Henan is choszen as the research object. We investigate through the exploration of the scene, understand its project geology and hydrology geological condition. In order to choose reasonable calculation parameter to go on slope stability analyze, the rock physics mechanics parameters have been obtained by laboratory and optimized by empirical formula. At the base of holding engineering geological condition, the author choose the typical cross section of the safety analysis of slope engineering and establish the reasonable model of theoretical calculation.Limiting equilibrium theory is used to analyze side slope stability, calculate its safety coefficient and appraise its stability. The safety coefficients of three side slopes are 0.861,1.412, 1.472 before mining and 0.749,1.168, 1.375 after mining.Numerical simulation tool FLAC3D is chosen as the analysis tool, which is widely used in the geotechnical engineering field. FLAC3D is based on the hypothesis that subjects are deformable bodies, which is closer to real condition. FLAC3D chooses strength reduction method for the stability criterion which is in the same principal as the conventional stability criterion. Typical cross section of the side slope is chosen for numerical simulation, the calculation model is founded according to the geological situation and landside mass characteristics. Safety factor and potential slip surface are analyzed. The safety coefficients of three side slopes are 0.87, 1.65, 1.68 before mining and 0.82, 0.75, 1.68 after mining. By the compare of the two kinds of results from the limiting equilibrium method and the simulation with strength reduction method, we can confirm that it's feasible and practical to use the strength reduction method of FLAC. The computed result indicates that vacant place has the remarkable influence on No. II side slope. At the end, according to the characters of landslide the author gives advise on comprehensive improvement to insure the stability of landslide.