An approach to determining critical slip surface based on displacement field analysis

YUAN Wei; HU Ye-jiang; LI Xiao-chun; BAI Bing; WANG Wei; JI Xiao-lei

doi:10.16285/j.rsm.2016.06.032

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An approach to determining critical slip surface based on displacement field analysis

更新时间：2026-06-25

- An approach to determining critical slip surface based on displacement field analysis
- Vol. 37, Issue 6, Pages: 1791-1798(2016)
- 作者机构：
  
  1. 石家庄铁道大学土木工程学院,河北,石家庄,050043
  2. 中国科学院武汉岩土力学研究所岩土力学与工程国家重点试验室,湖北,武汉,430071
  3. 中国兵器工业北方勘察设计研究院有限公司,河北,石家庄,050043
- 作者简介：
- 基金信息：
- DOI：10.16285/j.rsm.2016.06.032
  CLC： TU457
- Online First：09 June 2018，
  
  Published：2016
- 稿件说明：
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YUAN Wei, HU Ye-jiang, LI Xiao-chun, et al. An approach to determining critical slip surface based on displacement field analysis[J]. 2016, 37(6): 1791-1798.
DOI：

YUAN Wei, HU Ye-jiang, LI Xiao-chun, et al. An approach to determining critical slip surface based on displacement field analysis[J]. 2016, 37(6): 1791-1798. DOI： 10.16285/j.rsm.2016.06.032.

摘要

安全系数的计算和临界滑动面的确定是边坡稳定性分析的两个组成部分，强度折减法可以得到合理的安全系数，但却不能准确刻画临界滑动面的位置。基于对滑动现象的认识，提出了一种基于位移场分析的临界滑动面确定方法，认为当边坡处于临界状态时，其潜在滑动面附近的位移等值线最为密集，潜在滑动面上的点往往是在深度方向上沿垂直滑面的位移变化率达到最大值的位置。将本文方法与Spencer法、岩质边坡模型试验进行了对比，验证了该方法在曲线和折线滑动面搜索方面的适用性和可靠性。同时，探讨了单元形状、疏密程度、离散点间距等因素对滑动面的影响。

Abstract

In slope stability analysis

one needs to calculate the factor of safety and determine the slip surface. The strength reduction method can yield reasonable value of the safety factor

but it cannot depict correctly the critical slip surface. This paper proposes an approach to determining the critical slip surface based on the displacement filed analysis during the sliding movement. It is shown that the displacement contours near the slip surface are the densest at the critical state of slope. The points along the potential slip surface represent those points at which the change rate of displacement along the direction perpendicular to the critical slip surface reaches the maximum in the vertical direction. By comparing the proposed method with the Spencer method and physical model test of rock slopes

it is shown that the proposed method yields good results in searching the slip surfaces. In addition

the effects of some other factors such as geometrical shape

degree of density and discrete point spacing on the slip surface are discussed.

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