土工基础

›› 2019, Vol. 33 ›› Issue (5): 600-603.

• 工程实录 • 上一篇    下一篇

西南山区挖方边坡稳定性及加固分析

李振东，刘 宏，胡 宣，毛吉成   

  1. （贵州大学 国土资源部喀斯特环境与地质灾害重点实验室，贵阳 550025）
  • 收稿日期:2019-04-09 修回日期:2019-04-19 出版日期:2019-10-20 发布日期:2019-10-22
  • 通讯作者: 刘 宏（1976-），男，教授，研究方向为岩土工程。
  • 作者简介:李振东（1994-），男，硕士研究生，研究方向为岩土工程。

Stability and Remediation Analysis of a High Cut Slope in Southwest Mountain Area

LI Zhendong, LIU Hong, HU Xuan, MAO Jicheng   

  1. (Ministry of Land Resources Key Laboratory for Karst Environment and Geology Disasters, Guizhou University, Guiyang 550025)
  • Received:2019-04-09 Revised:2019-04-19 Online:2019-10-20 Published:2019-10-22

摘要： 采用Geo-Studio软件建立挖方高边坡模型，通过对三种不同挖方施工方案进行数值模拟，分析挖方高边坡的变形破坏特征和稳定性，探究不同放坡坡率对挖方高边坡稳定性的影响。根据三种开挖施工方案下位移、稳定性的变化情况，优化边坡放坡坡率，提出合理的加固方案。研究表明，边坡开挖之后，三种方案均可能出现失稳破坏，采用预应力锚索加固后边坡稳定。经方案比选，综合放坡坡率1：1.3时的开挖量最小。采用预应力锚索加固后，三种方案位移均有减小，产生位移主要原因是表层红粘土变形较大，建议在优化坡比的基础上采用预应力锚索加固边坡。

关键词: 挖方边坡, 稳定性, 加固

Abstract: The stability of a high cut slope under three difference construction sequences was evaluated by using the commercial software GeoStudio. The deformation and stability effect in the different cut slope angles are analyzed so that the optimized slope angle and slope stability improvement can be obtained. The results indicated that, slope failure could occur for all three different slope angles. The pre-stressed ground anchor can be used for the slope stability remediation. The analysis results also indicated that the minimum earthwork could be obtained when a cut slope angle of 1：1.3 was used. The deformation of all three slope angles could be reduced after the prestressed ground anchors were applied. The surficial red clay soil layer contributed the major deformation of the cut slope.

Key words: Cut Slope, Slope Stability, Slope Remediation