土工基础

土工基础 ›› 2021, Vol. 35 ›› Issue (3): 356-358.

• 专题论述 • 上一篇    下一篇

基于极限平衡法的特殊土高填方路基稳定性分析

夏 怡，方正峰   

  1. （贵州宏信创达工程检测咨询有限公司，贵阳 550014）
  • 收稿日期:2020-07-02 修回日期:2020-07-20 出版日期:2021-06-25 发布日期:2021-06-26
  • 作者简介:夏 怡（1984-）,女，高级工程师，研究方向为道路工程。

Stability Analysis of High Embankment with Special Soil Using Limit Equilibrium Method

XIA Yi, FANG Zhengfeng   

  1. (Guizhou Hongxin Chuangda Engineering Testing & Consulting Co. Ltd., Guiyang 550014)
  • Received:2020-07-02 Revised:2020-07-20 Online:2021-06-25 Published:2021-06-26

摘要： 通过极限平衡法研究路基填料、高度、坡率等不同因素对特殊土高填方路基稳定性的影响，研究结果表明：路基高度对稳定性影响显著，路基坡率越缓，膨胀土路基的稳定性越好，1∶1.5~1∶1.75的边坡坡率是较为合适的；地形坡度对路基自身稳定性较小；提高地基的内摩擦角来可相应提高路基的稳定性安全系数，但当地基强度超过路基填料强度时，提高地基的内摩擦角对提高路基的稳定性安全系数无效。研究成果可为工程设计、施工提出针对性的工程措施。

关键词: 极限平衡法, 路基, 稳定性分析

Abstract: Through the limit equilibrium method to study the influence of different factors such as embankment backfill material, embankment height, slope angle and other factors on the stability of the special soil embankment. The results of this study show that the embankment height has a significant impact on the stability. The lower slope angle, the better the stability of the expansive soil embankment. The slope ratio of 1∶1.5 to 1∶1.75 is more adequate as the embankment slope angle. The influence of natural ground slope on the embankment slope stability is small; increasing the internal friction angle of the embankment material can correspondingly improve the stability safety factor of the embankment, but when the strength of the natural ground exceeds the strength of the backfill material of embankment, increasing the internal friction angle of the natural ground soil is not effective to improve the stability safety factor of the embankment.

Key words: Limit Equilibrium Method, Roadway Embankment, Stability Analysis

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