Discussion on force between columns of three-dimensional limit equilibrium for slope stability analysis

YUAN Heng; LUO Xian-qi; ZHANG Zhen-hua

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Discussion on force between columns of three-dimensional limit equilibrium for slope stability analysis

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- Discussion on force between columns of three-dimensional limit equilibrium for slope stability analysis
- Vol. 32, Issue 8, (2011)
- 作者机构：
  
  1. 三峡大学地质灾害防治研究院,湖北,宜昌,443002
  2. 中煤国际工程集团重庆设计研究院,重庆,400016
  3. 上海交通大学船舶海洋与建筑工程学院,上海,200030
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU431
- Online First：16 August 2011，
  
  Published：2011
- 稿件说明：
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YUAN Heng, LUO Xian-qi, ZHANG Zhen-hua. Discussion on force between columns of three-dimensional limit equilibrium for slope stability analysis[J]. 2011, 32(8).
DOI：

YUAN Heng, LUO Xian-qi, ZHANG Zhen-hua. Discussion on force between columns of three-dimensional limit equilibrium for slope stability analysis[J]. 2011, 32(8). DOI：

摘要

根据在自重作用下潜在滑体在斜面上运动的规律，提出条柱底滑面上抗滑力方向垂直于底滑面与水平面交线的假定，并引用条间抗剪强度发挥系数的概念，运用各条柱的3个方向力的平衡和边坡整体3个方向的力矩平衡，提出了一种计算边坡稳定性的三维极限平衡方法，通过对算例的计算结果分析发现：当忽略条柱间全部剪力作用时，得到的安全系数与二维Spencer法计算结果相近；考虑部分条柱间剪力作用时，得到的安全系数与文献[5]计算结果相近；当考虑条柱间横向剪力对边坡稳定性的贡献时，即考虑条柱间全部作用力，得到的安全系数最高，这种假定更能反映边坡实际受力情况，因此，所得的结果更接近于实际

Abstract

Based on the movement law of the potential sliding body sliding in the inclined plane by dead weight effect

the assumption that the direction of the anti-sliding force is perpendicular to the intersecting line of the sliding surface and the horizontal plane are proposed. Citing a concept of played factor of inter-slice shear strength

a three-dimensional limit equilibrium method for calculating slope stability are proposed using force equilibrium of each pillar and moment equilibrium of the whole slope body in three directions. Through case study

when all the shear forces among columns are neglected

the safety factor is similar to the result of two-dimensional Spencer method. If considering part of the shear forces among columns

the safety factor is similar to the result of the reference [5]. If considering all the forces among the columns including the contribution of transverse shear force on the slope stability

the safety factor is the highest; this assumption can reflect actual conditions of slope better and the results are closer to reality.

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