SLOPE STABILITY NUMERICAL CALCULATION USING GEOTECHNICAL STRENGTH YIELD CRITERION AND SPH INSTABILITY CRITERION ANALYSIS METHOD

摘要

In order to address the problem of stability and large deformation of soil slope in numerical calculation of slope stability, a method for analysis of rock- soil strength yield criterion and instability criterion based on smooth particle hydrodynamics (SPH) is proposed. Firstly, the SPH program is written in Fortran language to simulate the stability of soil slope and large deformation analysis of landslide after instability. Secondly, a classical example is utilized to verify the accuracy of the proposed method in slope stability analysis. Finally, in order to verify the accuracy of this method in simulating large deformation of viscous soil slope, a set of physical experiments of substantial deformation of viscous soil slope was designed and compared with SPH simulation results. Experimental results show that, based on the elastic-plastic constitutive model and the D - P yield criterion of SPH method can accurately simulated stability coefficient and potential slip surface, and can accurately simulate the instability of large landslide deformation after the development process, make up for the deficiency of the current numerical simulation method, a new type of stability and landslide is a worth extending large deformation analysis method.