岩土力学2017，Vol.38Issue(1)：157-164,8.DOI:10.16285/j.rsm.2017.01.020
基于电阻率法的膨胀土膨胀性评价研究
Evaluation of expansibility of expansive soil using resistivity method
摘要
Abstract
Currently,it is is difficult to obtain the expensive rate of expansive soil simplely and rapidly.Generally,the expensive rate can only be obtained through indoor test.It is shown that the internal structure will be changed with water swelling by previous experiments about the electrical characteristics of expansive soil in laboratory.The change of internal structurecan lead to the change of resistivity.Resistivity,expensive rate and other related performance experiments are performed by using Hefei expansive soil.The resistivity index is used to predict the water swelling characteristics of expansive soil.It can be found that the expansive rate increases with the increase of initial resistivity and decreases with the increase of the overlying load.In addition,the vertical resistivity exhibits a linear increase with real-time expansion rate until the soil resistance rate reaches pore fluid resistivity.The previous experimental studies of our research group about resistivity characteristics of expansive soil are used to analyze and contrast.It can be found that expansion characteristics of expansive soil have a good fit with resistivity properties.Hence,the resistivity can be used to predict expansion rate.As the corresponding expensive rate is a dimensionless index,through the normalization of cohesive soil resistivity and regardless of the influence of the porosity,the relationship between dimensionless integrated resistivity index Er and the expensive rate is developed.The conclusions can be used for the expansion rate prediction of expansive soil.关键词
膨胀土/膨胀率/电阻率/室内试验Key words
expansive soil/expansive rate/electrical resistivity/laboratory test分类
建筑与水利引用本文复制引用
储亚,查甫生,刘松玉,蔡国军,寇博..基于电阻率法的膨胀土膨胀性评价研究[J].岩土力学,2017,38(1):157-164,8.基金项目
国家自然科学基金重点项目(No.41330641) （No.41330641）
国家自然科学基金项目(No.41202203). （No.41202203）
