摘要
为了解寒冷地区粗粒土边坡在降雨过程中的力学行为,开展了一系列降雨模型试验。首先,量化了降雨过程中各种因素对边坡破坏的影响,并从力学角度进行分析,讨论了边坡破坏的原因。通过针对春季和夏季发生的边坡破坏进行模拟试验,研究了降雨期间冻融历史对力学行为的影响。试验结果表明,边坡破坏取决于初始含水率,可以通过边坡内部的饱水量进行评估。此外,边坡内与剪切相关的体积变化(剪胀特性),证明了在有冻融历史的边坡内冻结区与非冻结区的边界处会发生结构变化,从而诱发边坡破坏。
In order to understand the mechanical behavior of coarse-grained soil slope during rainfall in cold area,a series of rainfall model tests are carried out.Firstly,the influence of various factors on slope failure during rainfall is quantified,and the cause of slope failure is discussed from the perspective of mechanics.The effects of freeze-thaw history on mechanical behavior during rainfall are studied by simulating slope failure in spring and summer.The test results show that the slope failure depends on the initial water content and can be evaluated by the saturation water inside the slope.In addition,based on the volume change(dilatancy property)related to shear in the slope,it is proved that the structural change will occur at the boundary between the frozen zone and the non-frozen zone in the slope with a history of freeze-thaw,which will induce the slope failure.
作者
韩旭辉
HAN Xu-hui(Shanxi Vocational University of Engineering Science and Technology,Jinzhong 030619,China)
出处
《公路》
北大核心
2025年第8期29-37,共9页
Highway
基金
山西省教育厅高等学校科技创新计划项目,项目编号2023L414。
关键词
边坡破坏
粗粒土
降雨
冻融作用
模型试验
slope failure
coarse grained soil
rainfall
freeze-thaw action
model test
