The Large Deformation Simulation Of Joint Rock Slope

Slope engineering is an important branch in geotechnical engineering, which aims at giving safety evaluation based on stability analysis. FEM has advantages over traditional methods by theory of limit equilibrium, at present FEM is generally based on the hypothesis of the linear elastic tiny-deformation, the calculating result from tiny-deformation theory is not correct for the slope deformation which can not be ignored in practice. Considering this problem FEM based on large elastic-plastic deformation theory is introduced.According as strength reduction theory a new stability analysis method for joint rock slope is presented in this paper. The safety factor is defined by the eigenvalue of curve Fs vs.ε.The result reveals the new method of stability analysis based on large elastic-plastic deformation FEM is adapt to jointed rock slope, the strength reduction of FEM contribute to obtain critical failure surface and stability safety factor relative to theory of limit equilibrium. Through a series case study the new stability analysis method for slope is demonstrated.Through the simulation of stage excavation of rock slope, initial ground stresses is studied accordingly, furthermore, the reinforcement mechanisms of pre-stressed cable in combination with shot-concrete are analyzed, and some conclusions are drawn. The results indicate, with the help of the pre-stressed cable, the deformation of slope is improved in evidence. In the course of two stage excavation of slope, the axial stress of pre-stressed cable is promoted considerably. For a typical excavated slope, slope engineering construction is simulated through analysis of stress and deformation based on large elastic-plastic deformation theory.