Upper bound limit method for stability analysis of rock slopes by block element method

ZHENG Hui-feng; CHEN Sheng-hong; WU Guan-ye

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Upper bound limit method for stability analysis of rock slopes by block element method

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- Upper bound limit method for stability analysis of rock slopes by block element method
- Vol. 29, Issue S1, (2008)
- 作者机构：
  
  1. 中国水电顾问集团华东勘测设计研究院,杭州,310014
  2. 武汉大学水资源与水电工程科学国家重点实验室,武汉,430072
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU457
- Online First：15 April 2016，
  
  Published：2008
- 稿件说明：
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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：

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：

摘要

将块体单元法与极限分析上限法相结合，提出了岩石边坡稳定的块体单元极限分析上限法。借助于块体单元法离散计算区域，通过块体系统速度场在结构面上满足Mohr-Coulomb屈服条件、关联流动法则、速度边界条件以及块体系统虚功原理，构成求解边坡强度储备安全系数上限解的非线性规划模型，模型的求解采用复合形法。最后研究了一个岩质楔形体边坡算例和小湾水电站进水口边坡实例，通过将块体单元法上限分析计算结果与刚体极限平衡法相比较，验证了该方法的正确性。

Abstract

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.

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