长沙理工大学学报(自然科学版)2025,Vol.22Issue(3):54-68,15.DOI:10.19951/j.cnki.1672-9331.20250221001
降雨入渗对压实黄土地基增湿影响研究
Effect of rainfall infiltration on humidification of compacted loess foundations
摘要
Abstract
[Purposes]Disasters caused by rainfall in loess fill engineering are countless.Studying the humidification effect of rainfall-induced loess fill foundations is of great significance for foundation stability design and engineering disaster prevention and control.[Methods]A loess fill engineering was set as the background,and the humidification and deformation analysis of loess foundations was realized by numerical analysis through Comsol software.The humidification and deformation rules of high loess fill under different rainfall types(rainstorm,heavy rain,moderate rain,and light rain)and different compaction conditions(λ=0.98,λ=0.95,λ=0.93,λ=0.90,and λ=0.88)were studied.[Findings]As the compaction of the fill intensifies,both the maximum infiltration depth Hmax and the humidification and deformation degree ΔS decrease.Hmax changes from 3.26 to 14.45 m,and the humidification and deformation ratio ζ generally decreases.With increasing rainfall,both Hmax and ΔS increase,and ζ generally rises as well,with its range being between 1.1%and 3.6%.Under moderate rain conditions,the total rainfall is at its highest,and the humidification effect on surface infiltration is more pronounced.[Conclusions]Special attention should be paid to the influence of long-term rainfalls at moderate intensity on the safety of loess fill engineering,and appropriate waterproof and drainage measures should be taken in time to guide water flow and avoid water accumulation and erosion.关键词
黄土地基/降雨/增湿沉降/压实度/高填方Key words
loess foundation/rainfall/humidification-induced settling/compaction degree/high fill分类
建筑与水利引用本文复制引用
王春淼,段浩然,彭森,高星星,王志清,王友林,朱才辉..降雨入渗对压实黄土地基增湿影响研究[J].长沙理工大学学报(自然科学版),2025,22(3):54-68,15.基金项目
国家自然科学基金(52279110、52178355、52108339) (52279110、52178355、52108339)
陕西省公益性地质专项(202406) (202406)
陕西省城市地质与地下空间工程技术研究中心开放性课题(2024KT-04、2024KT-01) National Natural Science Foundation of China(52279110,52178355,and 52108339) (2024KT-04、2024KT-01)
Shaanxi Province Public Welfare Geological Special Project(202406) (202406)
Open Project of Shaanxi Engineering Technology Research Center for Urban Geology and Underground Space(2024KT-04 and 2024KT-01) (2024KT-04 and 2024KT-01)