Rock bridge slice element method in slope stability analysis based on multi-scale geological structure mapping

来源期刊：中南大学学报(英文版)2008年第z2期

论文作者：张发明 汪北华 陈祖煜 汪小刚 贾志欣

文章页码：131 - 137

Key words：rock slope； three dimensional geological structure； rock bridge slice element method； stability

Abstract: The searching method of failure surface which consists of complex geological structures in high and steep rock slopes was studied. Based on computer simulation technology and Monte-Carlo method, three dimensional multi-scale geological structures such as engineering scale and statistical scale structures of the slope were simulated. The searching method of failure route which consists of joints and rock bridges was determined via simulation annealing method by considering the shear strength of joints or rock bridges in one supposed route. When shear strengths of all the supposed routes were computed, the least shear strength route was considered failure route. Then, the inclined slice of joint slices and rock bridge slices were separated according to the position of joints and rock bridges. For the rock bridge slices, by distinguishing the failure model, the force direction to the next slice was defined. Finally, the limit equilibrium equations for every slice were established, and the slope stability factor was obtained. One practical example indicates that the discussed method is more closely to the real condition.