中南大学学报（自然科学版）2025，Vol.56Issue(5)：1886-1899,14.DOI:10.11817/j.issn.1672-7207.2025.05.016
考虑水分迁移与成冰作用的路堑边坡冻融变形机制试验研究
Experimental study on freeze-thaw deformation mechanism of cut slope considering water migration and ice formation
摘要
Abstract
Considering groundwater recharge conditions,this study employed a one-dimensional freezing method to investigate the freeze-thaw deformation mechanisms of road embankment slopes in seasonal freezing regions.A large-scale physical slope model(length×width×height is 2.0 m×0.8 m×1.1 m)was constructed to systematically examine moisture migration patterns,phase transformation,and freeze-thaw settlement evolution during cyclic freeze-thaw processes.The experimental results demonstrate that moisture redistribution serves as the primary factor inducing slope instability in seasonal frozen areas.Under the freezing condition of initial moisture content of 12%and freezing conditions at-20℃,the distribution of moisture significantly influences the rate of temperature change in the slope.After 530 h of freezing,the maximum freezing temperature difference between different water contents in the same soil layer is approximately twice that of the initial state.Cyclic freeze-thaw processes drive progressive moisture accumulation toward the slope base,with some areas experiencing a maximum moisture increase of 10%.Ice lens formation predominantly occurs in moisture-enriched zones,exhibiting directional growth aligned with freeze-thaw progression.During the freeze-thaw process,moisture migration and ice formation lead to a reduction in soil consolidation that exceeds the increase caused by frost heave and thaw settlement,resulting in a maximum displacement of over 70 mm at the top of the slope.Moisture migration exacerbates ice lens growth thereby promoting the development of weak zones on slopes.The study reveals the dynamic interactions of moisture,temperature,and displacement within the slope under conditions of water recharge in a seasonally frozen region.关键词
冻融循环/冻胀融沉/水分迁移/边坡失稳/热融滑塌Key words
freeze-thaw cycle/frost heave and thaw sink/water migration/slope instability/thermal collapse分类
建筑与水利引用本文复制引用
宋俊,JENISHA Singh,滕继东,张升,盛岱超..考虑水分迁移与成冰作用的路堑边坡冻融变形机制试验研究[J].中南大学学报（自然科学版）,2025,56(5):1886-1899,14.基金项目
国家自然科学基金资助项目(52350410461,52178376) （52350410461,52178376）
湖南省自然科学基金资助项目(2022JJ10076) （2022JJ10076）
国家重点研发计划项目(2022YFB2603301) （2022YFB2603301）
中国中铁股份公司科技研究开发计划项目(2022-重大-13)(Projects(52350410461,52178376)supported by the National Natural Science Foundation of China （2022-重大-13）
Project(2022JJ10076)supported by Natural Science Foundation of Hunan Province （2022JJ10076）
Project(2022YFB2603301)supported by National Key Research and Development Program of China （2022YFB2603301）
Project(2022-Major-13)supported by Science and Technology Research and Development Program of China Railway Group Limited) （2022-Major-13）
