土工基础

›› 2018, Vol. 32 ›› Issue (5): 549-551.

• 工程实录 • 上一篇    下一篇

基于三剪统一屈服准则的边坡稳定性计算

陈 特1，陈光海2   

  1. (1.中国电建集团中南勘测设计研究院有限公司，长沙 410014;2.萍乡市公路管理所，江西萍乡 337000)
  • 收稿日期:2018-06-12 修回日期:2018-06-19 出版日期:2018-10-30 发布日期:2018-11-02
  • 作者简介:陈 特（1987-），男，工程师，研究方向为水电站厂房设计。

Slope Stability Analysis Using the Unified TripleShear Yield Criterion

CHEN Te1, CHEN Guanghai2   

  1. (1.Zhongnan Engineering Co. Ltd.,  Power China, Changsha 410014;
    2.Pingxiang Highway Management of Bureau, Pingxiang 337000)
  • Received:2018-06-12 Revised:2018-06-19 Online:2018-10-30 Published:2018-11-02

摘要： 基于三剪统一屈服准则讨论了边坡稳定性计算的问题，得到了基于三剪统一屈服准则瑞典条分法计算边坡稳定性系数的计算公式。实例计算结果表明土中应力状态、土的抗剪强度指标以及中间主应力系数b对安全性系数都有一定的影响。Lode参数μ0>0时安全系数随其增大而减小，当μ0<0时安全系数随其增大而增大，安全系数随着土体内摩擦角以及黏聚力的增加而增大，安全系数随着b值的增加而增大。考虑了中间主应力的影响，能更充分利用材料的强度潜力，可提高边坡安全稳定性系数。

关键词: 三剪统一屈服准则, 边坡稳定, 中间主应力

Abstract: This paper presents the slope stability evaluation results using the unified triple shear yield criterion. The Swedish Slicing Method with the unified triple shear yield criterion was used to estimate the factor of safety of the target slope. The results indicate that the stress state, shear strength of the soil as well as the middle principal stress coefficient can, at least some extent, affect the factor of safety. When the Lode Parameter is greater than zero, the resultant factor of safety decreases with the increase of the Lode Parameter. When the Lode Parameter is smaller than zero, the obtained factor of safety of the slope increases with this parameter. The factor of safety also increases with the cohesion, the internal friction angle as well as the middle principal stress coefficient. It is concluded that the factor of safety of the slope can be improved by considering the effect of the middle principal stress coefficient.

Key words: Unified TripleShear Yield Criterion, Slope Stability Evaluation, Intermediate Principal Stress