中外公路2025，Vol.45Issue(6)：17-24,8.DOI:10.14048/j.issn.1671-2579.2025.06.003
静动荷载对高液限土吸附结合水和变形的影响规律研究
Influence Mechanism of Static and Dynamic Loading on Adsorbed Bound Water and Deformation in High Liquid Limit Soils
摘要
Abstract
In order to reveal the evolution law of adsorbed bound water and the deformation characteristics of high liquid limit soil under static and dynamic loading,Hainan high liquid limit soil and Hunan clayey sand were selected as comparative samples.Through consolidation,consolidation-creep,and dynamic triaxial tests,the deformation patterns of high liquid limit soil under different loading conditions were obtained.By combining nuclear magnetic resonance tests,the variation pattern of adsorbed bound water content in specimens before and after the consolidation and dynamic triaxial tests was studied.The results show that under static loading,the compression coefficient of high liquid limit soil meets the requirements of the Specifications for Design of Highway Subgrades(JTG D30-2019)for subgrade fill materials.The adsorbed bound water content is basically stable,and the consolidation-creep deformation is small.Under dynamic loading,the elastic strain and permanent axial strain of the specimen increase with increasing loading amplitude.Dynamic loading significantly reduces the adsorbed bound water content in the high liquid limit soil,leading to the large plastic cumulative deformation of the soil under cyclic loading.The study can provide a reference for the engineering application of high liquid limit soils as lower embankment fill.关键词
道路工程/高液限土/荷载/吸附结合水/塑性变形/核磁共振Key words
road engineering/high liquid limit soil/loading/adsorbed bound water/plastic deformation/nuclear magnetic resonance分类
交通工程引用本文复制引用
FANG Zhongwang,ZHOU Shijie,XIAO Yupeng,PENG Xin,ZHANG Rui..静动荷载对高液限土吸附结合水和变形的影响规律研究[J].中外公路,2025,45(6):17-24,8.基金项目
国家自然科学基金资助项目(编号:52278432) （编号:52278432）
海南省地方标准制修订项目(编号:2021-Z043) （编号:2021-Z043）
