土工基础

土工基础 ›› 2021, Vol. 35 ›› Issue (3): 347-351.

• 专题论述 • 上一篇    下一篇

基于FLAC3D公路风化岩边坡稳定性分析

苏 阳1，覃晓雨1，刘之葵1，戴星海2   

  1. （1.桂林理工大学 土木与建筑工程学院，广西桂林 541000；2.中交生态环保设计研究院有限公司，天津 300457）
  • 收稿日期:2020-04-09 修回日期:2020-05-15 出版日期:2021-06-25 发布日期:2021-06-26
  • 通讯作者: 覃晓雨（1994-），女，在读硕士，研究方向为岩土工程。
  • 作者简介:苏 阳（1963-），男，工程硕士，教授级高工，研究方向为岩土工程。
  • 基金资助:
    广西自然科学基金项目（2017GXSFAA198238）

Stability Analysis of Highway Weathered Rock Slope Based on FLAC3D

SU Yang1, Qin Xiaoyu1, LIU Zhikui1, DAI Xinghai2   

  1. (1.College of Civil and Architectural Engineering, Guilin University of Technology, Guilin 541000;
    2.CCCC Ecological Environmental Protection Design and Research Institute Co. Ltd., Tianjin 300457)
  • Received:2020-04-09 Revised:2020-05-15 Online:2021-06-25 Published:2021-06-26

摘要： 以深圳市光明新区凤凰社区大外环公路东侧山顶边坡群边坡为研究对象，利用FlAC3D数值模拟软件，对花岗岩边坡的稳定性进行分析。基于Mohr—Coulomb 屈服准则下，假定黏聚力和内摩擦角按照不同折减系数进行强度折减，采用调整三维网格的单元模拟实际结构的方式。研究其应力分布特征，破坏形态和塑性区分布等，揭示滑坡机理。以剖面8-8IJK为基础模型，得出安全系数为1.21，小于安全储备系数，需提出合理的边坡治理方案，为工程技术人员预防和治理边坡失稳提供有益参考。

关键词: FlAC3D, 边坡稳定性, 数值模拟, 边坡稳定安全系数, 锚固

Abstract: The stability of a granite slope is analyzed by the FLAC3D numerical simulation software. The target slope was selected from the slope group on the east side of the great outer ring road in Fenghuang Community, Guangming New District, Shenzhen. Based on the Mohr Coulomb yield criterion, it is assumed that the cohesion and internal friction angle are reduced by different reduction factors, and the actual structure is simulated by adjusting the three-dimensional mesh element. A representative cross-section 8-8IJK as analyzed with the resultant safety factor of 1.21, which was less than the required factor of safety. Therefore, it is necessary to recommend a reasonable slope control plan, which could provide a useful reference for engineering technicians to prevent and control slope instability.

Key words: FlAC3D Slope Stability, Numerical Simulation, Slope Stability Factor of Safety, Ground Anchoring

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