工程地质学报2026，Vol.34Issue(3)：933-944,12.DOI:10.13544/j.cnki.jeg.2024-0242
酸溶液对原状黄土一维变形和微观结构影响的试验研究
EXPERIMENTAL STUDY FOR THE EFFECTS OF ACID SOLUTION ON THE ONE-DIMENSIONAL DEFORMATION AND MICROSTRUCTURE OF INTACT LOESS
摘要
Abstract
This research investigates one-dimensional unsaturated compression and collapse of intact loess conta-minated with different concentrations of sulfuric acid solution.The microstructure and mineral composition were analyzed using SEM and SEM-EDS to reveal the mechanism of acid pollution on the deformation of unsaturated loess.The results showed that the yield stress of 0.05 mol·L-1 and 0.5 mol·L-1 acid-contaminated loess increased and decreased,respectively,compared to the uncontaminated loess under different suctions.This is because the flocculation of clay in loess plays a dominant role at low-concentration acid pollution,while the dissolution of cementing minerals dominates at high-concentration acid pollution.On the other hand,the permissible void space of the soil structure decreased as the acid concentration increased under a given suction.This is due to the increase in the compression index of the remolded samples and the dissolution of cementing minerals caused by acid pollution.In addition,the measured and calculated collapse potentials were in good agreement for the uncontaminated and 0.05 mol·L-1 acid-contaminated samples,while the measured values for the 0.5 mol·L-1 acid-contaminated sample deviated from the calculations.This may be because the concentration of pore ionic solution during collapse is significantly lower in the latter case.关键词
酸污染黄土/微观结构/吸力/压缩变形/湿陷变形Key words
Acid-contaminated Loess/Micro-structure/Suction/Compressibility/Collapsibility分类
建筑与水利引用本文复制引用
张继文,穆青翼,薛明明,黄强兵,廖红建,薛伟,曹杰..酸溶液对原状黄土一维变形和微观结构影响的试验研究[J].工程地质学报,2026,34(3):933-944,12.基金项目
国家自然科学基金项目(资助号:52279109),国家重点研发计划项目(资助号:2023YFC3008404).This research is supported by the National Natural Science Foundation of China(Grant No.52279109)and the National Key R&D Program of China(Grant No.2023YFC3008404). （资助号:52279109）
