土工基础

›› 2018, Vol. 32 ›› Issue (6): 620-624.

• 工程实录 • 上一篇    下一篇

基于强度折减法的抗滑桩加固路基稳定性分析

邵巧希1，胡 蓉2   

  1. （1.温岭市交通工程质量安全监督站 ，浙江温岭 317500；2.温岭市轨道交通建设办公室，浙江温岭 317599）
  • 收稿日期:2018-01-07 修回日期:2018-02-02 出版日期:2018-12-20 发布日期:2018-12-21
  • 作者简介:邵巧希(1985-)，女，工程师，硕士研究生，研究方向为公路与桥梁建设管理。
  • 基金资助:

    国家自然科学基金（51308209）；湖南省自然科学基金（2015jj6038）

Stability Analysis of Embankments Strengthened by Sliding Resistant Caissons Using Strength Reduction Method

SHAO Qiaoxi1， HU Rong2   

  1. (1.Wenling Transportation Engineering Quality and Safety Supervision Station, Wenling, 317500；
    2.Wengling Rail Transit Construction Office, Wenling, 317599)
  • Received:2018-01-07 Revised:2018-02-02 Online:2018-12-20 Published:2018-12-21

摘要： 采用强度折减法分析了土质路基的稳定性，并且考虑土体的剪胀特性，探究了不同剪胀角对土质路基安全系数的影响，进而探究了抗滑桩对土质路基稳定性的影响。研究结果表明在路基发生失稳破坏的初始阶段，其坡脚处土体发生屈服，逐渐向上扩展直至形成贯通的滑动破坏面，此时路基发生破坏；土体的剪胀特性对于路基的稳定性具有显著的影响，随着剪胀角的逐渐增大，路基的安全系数逐渐增大，路基的稳定性增大；采用抗滑桩能够有效的抵御路基发生失稳破坏后上部土体的滑动变形，从而提高路基的稳定性。

关键词: 路基稳定性, 强度折减法, 安全系数, 剪胀特性, 抗滑桩

Abstract: The stability of fill embankment is an important topic in the geotechnical engineering field. This paper presents a case history of stability analysis of sliding resistant caisson improved embankment using strength reduction approach. The effect of embankment different dilatant angles on the embankment stability was investigated. The results indicate that, at the beginning of the failure, a plastic zone was developed at the toe of embankment and the plastic zone would progressively develop upward and formed a continuous plastic zone when the embankment is failed. The dilatant angle of embankment soil has a significant effect of the embankment stability. The factor of safety increases with the dilatant angle. Using the sliding resistant caisson can effectively improve the development of plastic zone above the caisson and therefore improves the embankment stability.

Key words: Embankment Stability, Strength Reduction Method, Factor of Safety, Dilatant Angle, Sliding Resistant