工程科学学报2015，Vol.37Issue(11)：1403-1409,7.DOI:10.13374/j.issn2095-9389.2015.11.002
顺层岩质边坡变形破坏特征及稳定性数值模拟
Numerical simulation of the deformation and failure characteristics of consequent rock slopes and their stability
摘要
Abstract
The deformation and failure characteristics of total 270 consequent rock slopes under complicated working conditions are investigated by the discrete element method depending on two parameters, structural plane dip angleθand slope angleα. Differentθ and α ranges corresponding to different failure modes are obtained by the statistical method. Moreover, the relationship between the two parameters and the slope stability is attempted based on the shear strength reduction method. The failure mechanism and stability characteristics of consequent rock slopes are revealed. Four deformation and failure modes of consequent rock slopes are proposed according to different deformation and failure characteristics:toe-slip-failure along the structural plane, top-sliding-failure along the structural plane, lower edge uplift bending-shear failure, and upper edge fracturing-fold-bending-failure. Further general rules of the four modes are analyzed and summarized such as occurrences, deformation characteristics and possible failure modes. The safety factor fs of the slopes decreases and subsequently increases with the increase of θ, it reaches a minimum and then rises quickly to a high value and finally slowing down. During the changing process ofθ, the safety factor fs will obtain a minimum whenθis approximately e-qual to α-7. 3°, which corresponds to the worst slope stability.关键词
岩质边坡/边坡稳定性/变形特征/破坏模式/数值模拟Key words
rock slopes/slope stability/deformation characteristics/failure modes/numerical simulation分类
建筑与水利引用本文复制引用
高永涛,肖术,吴顺川,田庆梅,刘波..顺层岩质边坡变形破坏特征及稳定性数值模拟[J].工程科学学报,2015,37(11):1403-1409,7.基金项目
科技北京百名领军人才培养工程资助项目(Z151100000315014) （Z151100000315014）
国家自然科学基金资助项目(51174014) （51174014）
