ZHENG Hui-feng, CHEN Sheng-hong, WU Guan-ye. Upper bound limit method for stability analysis of rock slopes by block element method[J]. 2008, 29(S1).DOI:
A novel upper limit method for rock slope stability analysis is developed. Block element method (BEM) is employed to disperse the computational area and to construct a kinematically admissible velocity field. A nonlinear programming model for the upper limit of safety factor of rock slopes is formulated
in which the velocity field satisfies the constrain conditions including the Mohr-Coulomb yield criterion on the slide surface
the associated flow rule
boundary conditions
as well as the visual work of the block system. The model is solved by the complex shape method. A wedge-block in a rock slope is studied
which verified the efficiency of the method. Finally
its application to the intake slope of Xiaowan Hydropower Station shows the practicability of the method to the slope.