同济大学学报（自然科学版）2025，Vol.53Issue(4)：565-573,9.DOI:10.11908/j.issn.0253-374x.23356
干湿循环作用下非饱和压实黄土变形和电阻率特征的室内试验
Laboratory Tests on Deformation and Resistivity Characteristics of Unsaturated Compacted Loess Under Dry-wet Cycles
摘要
Abstract
Laboratory tests on the deformation and resistivity characteristics of unsaturated compacted loess under dry-wet cycles were carried out.First,the volume deformation and resistivity characteristics during cycling,as well as surface cracks after the desiccation of the sample undergoing five dry-wet cycles were obtained.Then,compression properties of the sample with different water contents were studied by the constant rate of strain(CRS)method,and the resistivity was also obtained.Finally,the nuclear magnetic resonance imaging and scanning electron microscopy were used to study the microscopic characteristics of the sample.The results show that with the increase of the number of dry-wet cycles,the swelling stain and crack ratio of the sample increase and the resistivity decreases,all of them tend to be stable as well.The yield stress significantly decreases and the elastic and plastic compression indexes increase after three wet-dry cycles.With the increase of the number of dry-wet cycles,the number of small pores in the compacted unsaturated loess obviously increases and the number of medium and large pores has a slight variation.关键词
非饱和压实黄土/干湿循环/电阻率/含水率/微观特征Key words
unsaturated compacted loess/dry-wet cycles/resistivity/water content/microscopic characteristics分类
土木建筑引用本文复制引用
秦鹏举,轩龙龙,王建美,邢鲜丽..干湿循环作用下非饱和压实黄土变形和电阻率特征的室内试验[J].同济大学学报（自然科学版）,2025,53(4):565-573,9.基金项目
国家自然科学基金(42177138,41907239) （42177138,41907239）
中国博士后科学基金(2020M680909) （2020M680909）
