Based On The FLAC3D Soil, Rock Combination Slope Stability Analysis

With the development of science and technology, the requirements of people to the cityconstruction are more and more high, slope engineering as one of the most importantconstruction, so the design and supporting of the slope request more and more high, itrequires that people make accurate, detailed analysis to the slope stability condition beforesupporting design, to ensure that promoting the city infrastructure construction under thepeople’s lives and property are safety.For more accurate to make analysis of slope stability, knowing slope instability, failuremode.On the previous studying of slope analyzing, this paper chooses a special kind oftypes——the combined soil with rock slope. Through the detailed geological exploration androck, soil related field and laboratory test, we can get the slope geological conditions, rockand soil physical and mechanical properties and site soil dynamic parameters, support designand so on. This paper introduces the basic principle and the classification of the qualitativeanalysis method and quantitative analysis method, As a result of the qualitative analysismethod has some disadvantages, this paper doesn’t use qualitative analysis method to makeanalysis of slope stability, only using the quantitative analysis method。Using quantitativeanalysis method to analyze the slope failure mechanism and failure pattern, through thewidespread use of limit equilibrium method for slope stability analysis by software tosimulate slope profile, we can get the safety coefficient; And compared to FLAC3D slopestability analysis software for finite difference method the calculated results, to analyze thestability of the slope.Through the finite difference software FLAC3D on slope3D simulation, the level ofslope displacement, vertical displacement, stress, deformation vector images, safety factor ofshear strain nephogram, velocity vector and slope monitoring displacement of sampling planmade full analysis to the stability of slopes. The deformation vectors, vector diagram areintuitive to show the potential sliding surface of slope, stability analysis results are consistentto the actual results in the destruction, This paper presents a fracture diagram of a practicalslope destruction, FLAC3D software can be used as a good means for the slope stabilityanalysis, With the numerical analysis method based on FLAC3D software can simulatedifferent types of slope, then get a quite precise morphological change,FLAC3D softwarethrough12basic grid shape simulated the model is almost consistent with the actualengineering, and then set the model structure and the mechanical characteristics of the materials, to represent the stress characteristics under the action of external forcedemonstrated of model. Then add the boundary and initial conditions, is used to define theprior to the initial state model boundary without being disturbed, then we can obtain the slopestabilization condition before excavation, supporting by calculating.