氯化钠污染对压实黄土状粉土压缩特性的影响  

The Influence of Water Content and Sodium Chloride Pollution on the Compressive Properties of Compacted Loess Silt

作　　者：武超 何斌[1,2] 刘浩帆 郭志远 白晓红 WU Chao;HE Bin;LIU Haofan;GUO Zhiyuan;BAI Xiaohong(College of Civil Engineering,Taiyuan University of Technology,Taiyuan 030024,China;Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering,Hohai University,Nanjing 210098,China;Shaanxi Branch,Huaneng Renewables Corporation Limited,Xi’an 710048,China)

机构地区：[1]太原理工大学土木工程学院,太原030024 [2]河海大学岩土力学与堤坝工程教育部重点实验室,南京210098 [3]华能新能源陕西分公司,西安710048

出　　处：《太原理工大学学报》2019年第5期647-652,共6页Journal of Taiyuan University of Technology

基　　金：国家自然科学基金资助项目(41807256);河海大学岩土力学与堤坝工程国家教育部实验室开放基金项目(201702)

摘　　要：通过人工拌和击实的方法制备氯化钠污染黄土状粉土,对其压缩变形特性进行室内试验研究。试验结果显示:氯化钠污染土在不同含水量下的初始孔隙比e 0都比同含水量下未污染土的初始孔隙比小,在相同含水量下随着氯化钠质量分数的增大,污染土的初始孔隙比呈逐渐减小的趋势;氯化钠污染后土的最优含水量较污染前呈减小趋势。相同含水量下,随着土中氯化钠质量分数增大,(100~200)kPa范围内压缩指数呈减小趋势,压缩模量呈增大趋势。In this paper,sodium chloride contaminated loess silt samples were prepared by manual mixing and compaction,and then their compression deformation characteristics were studied indoor.The experimental results show that the initial void ratio of sodium chloride contaminated soil at different water content was smaller than that of non-contaminated soil at the same water content,the initial void ratio of contaminated soil decreased gradually with the increase of sodium chloride content at the same water content,and the optimal water content of soil decreased after sodium chloride pollution.The compression index decreased and the compression modulus increased with the increase of NaCl content in soil,(100-200)kPa,in the same water content range.Sodium chloride contaminated soil contains mainly sodium and chloride ions.

关 键 词：污染土 孔隙比 压缩曲线 压缩指数 压缩模量 

分 类 号：TU192[建筑科学—建筑理论]