土工基础

›› 2016, Vol. 30 ›› Issue (4): 464-466.

• 工程实录 • 上一篇    下一篇

基于抗剪强度折减法的边坡稳定性分析

陈俊新   

  1. （福建地矿建设集团公司，福州 350002）
  • 收稿日期:2016-04-25 出版日期:2016-08-20 发布日期:2016-08-26
  • 作者简介:陈俊新(1982-)，男，工程师，研究方向为岩土工程勘察、地质灾害评估与边坡支护设计。

Slope Stability Analysis Based on Shear Strength Reduction Method

CHEN Junxin   

  1. (Fujian Geoengineering Construction Co., Fuzhou 350002)
  • Received:2016-04-25 Online:2016-08-20 Published:2016-08-26

摘要： 结合某边坡工程实例，利用有限差分软件FLAC，建立平面应变二维数值模型，基于抗剪强度折减法原理，分别对该边坡在锚杆加固前后的稳定性进行了数值计算分析。结果表明，在天然状态下，该边坡处于稳定状态，但在强降雨条件下（饱和状态），则存在失稳的可能；而在锚杆加固后，两种状态下的边坡安全系数均能大于工程设计要求值1.25，且潜在的滑动面也基本消除。

关键词: 抗剪强度折减法, 边坡稳定, 安全系数, 数值分析, 锚杆加固

Abstract: A twodimensional numerical model for a slope stability project was established by using the finite difference software FLAC. The stability concern was mitigated by ground anchors and the slope before and after the reinforcement were numerically analyzed. The analytical results indicate that the natural slope was marginally stable under the normal conditions but it might be unstable under the heavy precipitations. After the installation of ground anchor, the factors of safety under both normal and extreme conditions are greater than 1.25. The potential slip surface was able to be eliminated.

Key words: Shear Strength Reduction Method, Slope Stability, Safety Factor, Numerical Analysis, Ground Anchor Reinforcement.