土工基础

›› 2015, Vol. 29 ›› Issue (3): 88-91.

• 工程实录 • 上一篇    下一篇

基于FLAC3D的某滑坡抗滑桩加固效果分析

徐 翔，许 俊   

  1. (江西省水利规划设计院，南昌 330029)
  • 收稿日期:2015-01-12 出版日期:2015-06-20 发布日期:2015-06-26
  • 作者简介:徐 翔（1988-），男，助理工程师，研究方向为地质灾害。

Study of the Effectiveness of Utilizing Vertical Piles to Stabilize Slope Failure Using FLAC3D

XU Xiang， XU Jun   

  1. (Jiangxi Provincial Water Conservancy Planning and Designing Institute, Nanchang 330029)
  • Received:2015-01-12 Online:2015-06-20 Published:2015-06-26

摘要： 基于FLAC3D软件对抗滑桩加固滑坡进行数值模拟分析，从位移场、应力场。塑性区分布三个方面对滑坡支护前后效果进行分析，得出以下结论：边坡主要以压应力为主，但主应力方向基本上与边坡表面平行，因此对边坡的稳定性不利，但抗滑桩改变了周围的应力状态，对于改善边坡内部的应力状态也具有很好的效果。塑性区大部分为剪切塑性屈服，处于岩土分界面以上，且有所贯通，表明边坡内部土体的在自重的作用下发生了剪切屈服，抗滑桩可以隔断塑性区的贯通，有利于边坡稳定。

关键词: 抗滑桩, 数值模拟, 位移, 应力, 塑性区

Abstract:  A numerical model was set up to simulate vertical piles for slope stability using FLAC3D. The effectiveness of the vertical piles to stabilize slope failure was assessed by deformation, stress, and plastic zone distribution. The simulation indicates that compressive stress is generally developed in the slope with principal stress generally parallel to the slope which results in driving force. The inclusion of vertical piles in the slope alters the stress condition and improves slope stability. Generally connected plastic zones are mainly the result of shear failure right above the soilrock interface. Vertical piles socketed in rock improve the slope stability by interrupting the connectivity of the plastic zones.

Key words:  , Vertical Piles；Numerical Analysis；Displacement；Stress； Plastic Zone