Based On Hoek Brown Criterion Of Minimum Potential Energy Method Of Slope Stability Analysis

Slope stability analysis methods have the common limit equilibrium method that can be derived analytical solutions, as well as needed without analytic solution of numerical calculation with finite element method one of the commonly used for ANSYS,finite difference method with commonly used with FLAC method,and the application of the knowledge of geometry graphic method. The minimal potential energy method is a new method,the method is to use the principle of virtual displacements are derived,using displacement as the basic unknown quantities to satisfy the differential equation of force balance and force boundary conditions for solving.Minimal potential energy method is from the total energy of the system considered,the elastic body in external force on the object of the work done was transformed into the strain energy stored in the object without internal energy dissipation,strain energy is the total potential energy of elastic body.The application of minimal potential energy method failure criterion mainly adopts M-C criterion,this paper uses the Hoek-Brown criterion,based on the Hoek-Brown standard method,and the method is applied to the engineering practice.The main conclusions are the following points:(1) The safety factor for the minimum potential energy method in arbitrary slip surface shape of the slope were sloved. In the case of the failure criterion of Hoek-Brown, the result of the calculation of the safety factor and the method of limit equilibrium method close to the error was smaller.(2) Strength reduction in comparison to take a different reduction factor of the fitting out of the slide out line equation, normal stress worked out through the shlip line equations; Stabilizing force on the slopeworked out. The safety factor after calculation can be learned in the slope of the real slip line near the line slip out line operator closer to the real safety factor; Time proved that there are some errors when we fit the slope sliding column line.Safety factor calculated Little effect on different slip line.(3) The slope of the rock in the Hoek-Brown criterion and material mechanical parameters were analyzed.The parameters of the rock determined by some experiments, combined with the scene of some research work on engineering rock mass integrated. To determine the parameters of the process described.(4) Reduction method based on the strength of the Hoek-Brown criterion, calculated using the method of factor of safety and minimum potential energy method applied to compare. Verify the calculation results of the two methods were similar in the the Yinshan engineering instance. Strength reduction is based on the strength of the Hoek-Brown criterion Proved effective in the actual project. (5) In this paper the method on rock slope failure form of landslide is applicable. Rock mass no structure surface of rock or four groups and above structure surface of rock are applicable.