路基工程2024,Issue(5) :147-152.DOI:10.13379/j.issn.1003-8825.202312013

基于局部强度折减法的含软弱结构层边坡稳定性分析

Stability Analysis of Slope with Weak Structural Layer Based on Local Strength Reduction Method

胡军伟 袁伟民 陈国栋
路基工程2024,Issue(5) :147-152.DOI:10.13379/j.issn.1003-8825.202312013

基于局部强度折减法的含软弱结构层边坡稳定性分析

Stability Analysis of Slope with Weak Structural Layer Based on Local Strength Reduction Method

胡军伟 1袁伟民 1陈国栋1
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作者信息

  • 1. 中交第一公路勘察设计研究院有限公司,西安 710065
  • 折叠

摘要

基于西南某智慧生态城中的不稳定斜坡,通过FLAC3D有限元软件建立数值模型,对比分析局部强度折减法与整体强度折减法计算边坡稳定性的差异,并研究不同加固方式对边坡稳定性的影响.结果表明:边坡的安全系数、变形等主要由软弱结构层控制,局部强度折减法更适用于含软弱结构层边坡稳定性研究;实例边坡在天然状态下处于稳定,在暴雨状态下存在滑坡风险;采用"锚杆+框格梁"与"抗滑桩+预应力锚索"分别加固五级边坡与直立边坡后,在暴雨状态下的边坡稳定性大幅提升.

Abstract

Based on unstable slopes in a smart eco-city in the southwest,a numerical model was established using F1AC3D finite element software to compare the differences in calculation results between local strength reduction method and overall strength reduction method and the influence of different reinforcement methods on slope stability was studied.The calculation results show that the safety factor and deformation of slopes with weak structural layers are mainly controlled by the weak structural layers.The local strength reduction method is more suitable for the stability study of slope with weak structural layer.The slope example in this paper is stable in natural state,and there is landslide risk in rainstorm state;After the fifth grade slope and the vertical slope are strengthened by"anchor rod+frame beam"and"anti-slide pile+prestressed anchor cable"respectively,the stability of the slope in rainstorm is greatly improved.

关键词

边坡工程/软弱夹层/折减系数/稳定性分析/滑坡加固/安全系数

Key words

slope engineering/weak interlayer/reduction coefficient/stability analysis/landslide reinforcement/safety factor

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出版年

2024
路基工程
中铁二局集团有限公司,西南交通大学,中铁二院工程集团有限责任公司

路基工程

影响因子:0.36
ISSN:1003-8825
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