[1]刘华,张硕成,鲁洁,等.酸碱污染对Q3黄土湿陷表征影响的试验研究[J].西安建筑科技大学学报(自然科学版),2019,51(04):525-531.[doi:10.15986/j.1006-7930.2019.04.009]
　LIU Hua,ZHANG Shuocheng,et al.Laboratory tests on the collapsibility characteristics of Q3contaminated loess by acid and alkali solutions[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2019,51(04):525-531.[doi:10.15986/j.1006-7930.2019.04.009]
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酸碱污染对Q3黄土湿陷表征影响的试验研究()
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西安建筑科技大学学报（自然科学版）[ISSN:1006-7930/CN:61-1295/TU]

卷:
51
期数:
2019年04期
页码:
525-531
栏目:
出版日期:
2019-08-30

文章信息/Info

Title:
Laboratory tests on the collapsibility characteristics of Q3contaminated loess by acid and alkali solutions
文章编号:
1006-7930(2019)04-0525-07
作者:
刘华1; 2; 张硕成1; 鲁洁1; 2; 牛泽林1; 2; 冯志焱1; 2; 刘刚3
(1.西安建筑科技大学 土木工程学院,陕西 西安 710055; 2.西安建筑科技大学 陕西省岩土与地下空间工程重点实验室,陕西 西安 710055; 3.中铁北京工程局集团第一工程有限责任公司,陕西 渭南 714000)
Author(s):
LIU Hua1;  2;  ZHANG Shuocheng1;  LU Jie1;  2;  NIU Zelin1;  2;  FENG Zhiyan1;  2;  LIU Gang3
(1.School of Civil Engineering, Xian Univ. of Arch. & Tech., Xi an 710055, China 2.Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering, Xian Univ. of Arch. & Tech., Xi an 710055, China 3.The No.1 Engineering Co. Ltd of China Railway Beijing Engineering Group, Weinan 714000, China)
关键词:
Q3黄土; 酸碱污染; 湿陷性; 湿陷敏感性
Keywords:
Q3loess;  acid and alkali pollution;  collapsibility;  collapse sensitivity
分类号:
TU444
DOI:
10.15986/j.1006-7930.2019.04.009
文献标志码:
A
摘要:
随着我国黄土地区城镇化和工业化的快速发展，生活污水、工业废水中的酸碱溶液对土体的污染问题以及大气环境演变导致的雨水pH值发生的改变对土壤的污染问题也日渐突出.黄土的湿陷性及相应的湿陷敏感性是其特有的水敏特征，对岩土工程的长期稳定性至关重要.颗粒间的胶结及组构特征对Q3黄土的应力状态和工程性质起到了重要的作用，但酸、碱溶液的侵入在一定程度上改变及重组了微观结构.为研究孔隙水酸碱度对Q3黄土的湿陷性及湿陷敏感性的影响，本试验设计了重塑和原状两种土样污染前后的湿陷性试验.实验结果表明：酸性污染液与碱性污染液都会增加黄土的湿陷系数，增大湿陷稳定时间及速率，改变黄土的湿陷敏感性，不同浓度的酸碱污染液对土体的影响随浓度增加呈规律性变化；不同种类的酸溶液对土体的湿陷性及实现敏感性的影响也有差异.在此基础上对酸碱污染土样进行湿陷敏感性分析，得出了在实际工程中需要考虑黄土受酸碱污染后湿陷性改变所带来的额外影响
Abstract:
With gradual development of urbanization and industrialization in chinas loess plateau, the problem of soil pollution caused by acid and alkali solution in industrial wastewater and domestic sewage has become increasingly prominent. Meanwhile, the change of pH value from rain water caused by the evolution of atmospheric environment also results in the problem of soil pollution. The collapsibility of loess and the sensitivity of collapse are its unique properties, which have great influence on the engineering stability. The formation and occurrence of Q3 loess have played an important role, but the intrusion of acid and alkali solution has a certain degree of change and recombination of loess cementation and structure. In order to study the effect of pore water pH on the collapsibility and sensitivity of Q3 loess, the intact and remodeled loess samples were tested for collapsibility. The experimental results showed that the pollution of acid and alkaline solution will increase the collapsibility coefficient of loess, extend the settling time and rate of collapsing, and change the sensitivity of collapse. Furthermore, the effects of different concentrations of acid and alkali pollutants on the soil increased regularly as the concentration increased. Besides, the influence of different kinds of acid solution on the collapsibility and the sensitivity of the soil were also different. Based on this analysis, it is concluded that the influence of the collapsible change of loess polluted by acid and alkali should be considered in the engineering

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备注/Memo

备注/Memo:
修改稿日期:2019-06-10基金项目:国家自然科学基金项目(51608436)；陕西省自然科学基础研究计划(2018JQ5003, 2018JM5153)
收稿日期:2018-09-04
修改稿日期:2019-06-10
基金项目:国家自然科学基金项目(51608436)；陕西省自然科学基础研究计划(2018JQ5003, 2018JM5153)
第一作者:刘华(1983-)，男，博士，副教授，主要从事黄土力学与工程方面的教学和研究工作.E-mail：liuhua029@xauat.edu.cn
更新日期/Last Update: 2019-09-17