Stability analysis of jointed rock slopes with the Barton-Bandis constitutive model by discrete element method

Abstract:

Distinct element simulation in jointed rock masses is largely dependent upon the joint constitutive equations. Based on UDEC numerical simulation software, this paper detail describes the differences between the Barton-Bandis (BB) and the Mohr-Coulomb (MC) joint constitutive models when each model is applied to the stability analysis of the jointed rock slopes. The BB model, which allows the dilation accompanying the shear movements, can predict a good slope motion law consistent with field monitoring, therefore, the BB model is more suitable for analysising jointed rock projects. Consequently the 10 cm thick shotcrete was proposed for the reinforcement of this rock slope from the result of the BB model simulation, the result showed that proposition for the reinforcement of the slope was proved appropriate reinforcement method, the jointed rock slope is constructing according to this reinforcement method.