摘要
国内众多学者主要关注裂隙和渗流等因素对膨胀土边坡稳定性的影响,考虑膨胀特性对膨胀土边坡稳定性影响的研究成果较少,尝试量化膨胀特性对膨胀土边坡稳定性的影响,即基于极限上限定理,引入水平膨胀力参数,推导获得考虑水平膨胀力的边坡安全系数计算公式,再利用模型试验测试获得膨胀土水平膨胀力参数,由此构建一种考虑膨胀力的边坡稳定性极限上限分析方法。以某典型膨胀土高边坡为例,考虑水平膨胀力作用,膨胀土边坡安全系数降低11.1%,说明膨胀特性对膨胀土边坡稳定性的影响不可小觑。研究成果对膨胀土边坡工程的设计和施工具有参考价值。
Many domestic scholars mainly focus on the impact of cracks and seepage on slope stability,while there are few research results considering the impact of expansive force on the stability of expansive soil slopes.This article explores the impact of expansive force on the stability of expansive soil slopes.Based on the upper limit theorem,the horizontal expansion force parameters determined by model tests was introduced,a formula for calculating the safety coefficient of slopes was derived to construct an upper limit analysis method for slope stability considering the expansion force.Taking a typical expansive soil high slope as an example,considering the effect of horizontal expansion force,the safety factor of the expansive soil slope is reduced by 11.1%.The impact of expansion characteristic on the stability of the expansive soil slope cannot be underestimated.The research results have reference value for the design and construction of expansive soil slope engineering.
作者
陈建军
杜勇立
申权
何现启
CHEN Jianjun;DU Yongli;SHEN Quan;HE Xianqi(Hunan Chenglong Expressway Construction and Development Co.,Ltd.,Changsha,Hunan 410026,China;Hunan Provincial Communications Planning,Survey&Design Institute Co.,Ltd.,Changsha,Hunan 410200,China;College of Civil Engineering,Hunan University of Technology,Zhuzhou,Hunan 412007,China)
出处
《公路工程》
2023年第3期124-131,共8页
Highway Engineering
基金
湖南省教育厅科学研究项目(21C0421)。
关键词
膨胀土
膨胀特性
安全系数
极限上限分析理论
expansive soil
expansive characteristic
safety factor
upper limit analysis theory
