长江科学院院报2023，Vol.40Issue(12)：140-146,7.DOI:10.11988/ckyyb.20220755
基于电阻率法的非饱和路基水汽迁移试验研究
Experimental Study of Water Vapor Migration in Unsaturated Roadbed Based on Resistivity Method
摘要
Abstract
In unsaturated soil roadbeds,water migration occurs not only in liquid form but also in gas form.The coupled migration of water vapor can severely impact the long-term stability and service performance of the roadbed throughout its service life.We conducted resistivity tests and water vapor migration tests on representative unsaturat-ed soil roadbeds to investigate the effects of initial water content and initial degree of compaction on resistivity.The aim was to uncover the resistivity variation pattern of unsaturated soil roadbeds during water vapor migration and es-tablish a water content-resistivity model.The results indicate that the resistivity of clayey soil decreases exponential-ly with an increase in water content and compaction degree.Resistivity is more sensitive to changes in water content.Furthermore,as migration time increases,the resistivity decreases at the top of the soil while increasing at the bot-tom.Higher initial water content initially intensifies resistivity attenuation at the top of the soil,followed by a subse-quent decrease.As for different compaction tests,greater compaction results in a smaller decrease in resistivity at the top of the soil.The calculated results from the resistivity-water content model align well with the experimental data,exhibiting a good model fit.关键词
非饱和路基/水汽迁移/电阻率/含水率/压实度Key words
unsaturated roadbed/water vapor migration/resistivity/moisture content/degree of compaction分类
建筑与水利引用本文复制引用
张睿霞,唐红,姚海林,刘杰,朱乐萌..基于电阻率法的非饱和路基水汽迁移试验研究[J].长江科学院院报,2023,40(12):140-146,7.基金项目
国家自然科学基金项目(42077262,42077261,41672312) （42077262,42077261,41672312）
