西北水电Issue(2)：6-11,20,7.DOI:10.3969/j.issn.1006-2610.2026.02.002
酸污染对黄土力学特性影响及机理研究
Study on the Influence and Mechanism of Acid Contamination on the Mechanical Properties of Loess
摘要
Abstract
Geotechnical engineering problems caused by environmental issues have greatly threatened human production and life.To investi-gate the influence and mechanism of acid contamination on the mechanical properties of loess,loess from the Guanzhong area was taken as the research object,and HCl solutions with four concentrations(4%、8%、12%and 16%)were selected as the contaminant.A GDS triaxial ap-paratus was used to study the effect of HCl on the strength characteristics of the soil.On this basis,XRD and SEM tests were adopted to ana-lyze the internal mechanism of the strength variation of loess under HCl action from the perspectives of mineral composition,soil microstruc-ture and pore changes.The results show that HCl solution degrades the maximum deviator stress,cohesion and internal friction angle of the soil to a certain extent.The influence of HCl solution on the mechanical properties of the soil is mainly caused by the change of soil micro-structure:after HCl treatment,the number of soil pores increases,the flocculent structure in the soil disappears,and the flaky particles in-side large aggregates are exposed,resulting in the reduction of deviator stress strength and cohesion.The increase of soil pores and the smal-ler resistance required for rolling and sliding between particles lead to the decrease of internal friction angle.关键词
污染土/力学特性/SEM/黄土/内在机理Key words
contaminated soil/mechanical properties/SEM/loess/internal mechanism分类
建筑与水利引用本文复制引用
张鸿琴,乔白,蒲诚..酸污染对黄土力学特性影响及机理研究[J].西北水电,2026,(2):6-11,20,7.基金项目
国家自然科学基金项目(42177158,11902249) （42177158,11902249）
