[1]刘 华,谷宏全,胡鹏飞,等.孔隙水酸污染诱发击实黄土的崩解试验研究[J].西安建筑科技大学学报(自然科学版),2021,53(02):178-185.[doi:10.15986/j.1006-7930.2021.02.005]
　LIU Hua,GU Hongquan,HU Pengfei,et al.Experimental study on disintegration characteristics of compacted loess induced by acid pollution of pore water[J].J. Xi’an Univ. of Arch. & Tech.(Natural Science Edition),2021,53(02):178-185.[doi:10.15986/j.1006-7930.2021.02.005]
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孔隙水酸污染诱发击实黄土的崩解试验研究()
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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:
53
期数:
2021年02期
页码:
178-185
栏目:
出版日期:
2021-04-28

文章信息/Info

Title:
Experimental study on disintegration characteristics of compacted loess induced by acid pollution of pore water
文章编号:
1006-7930(2021)02-0178-08
作者:
刘 华1; 2; 谷宏全1; 胡鹏飞1; 胡文乐1; 牛泽林1; 2
(1.西安建筑科技大学 土木工程学院,陕西 西安 710055; 2.陕西省岩土与地下空间工程重点实验室,陕西 西安 710055)
Author(s):
LIU Hua1; 2;  GU Hongquan1;  HU Pengfei1;  HU Wenle1;  NIU Zelin1; 2
(1.School of Civil Engineering, Xi’an Univ. of Arch. & Tech.,Xi’an 710055,China; 2.Shaanxi Key Laboratory of Geotechnical and Underground Space Engineering,Xi’an 710055,China)
关键词:
重塑黄土;  酸污染;  崩解特性;  环境岩土工程
Keywords:
remolded loess;  acid pollution;  disintegration characteristic;  environmental geomechanics
分类号:
TU411.91
DOI:
10.15986/j.1006-7930.2021.02.005
文献标志码:
A
摘要:
以铜川重塑黄土为研究对象进行崩解室内试验,对硝酸污染后的击实黄土崩解特性进行分析研究.在制备不同干密度、含水率和硝酸浓度等击实试样后,探讨不同工况下的黄土崩解演变规律及其结果和影响.结果表明:干密度一定时,崩解速率随含水率呈现先增加后减小的趋势,当试样含水率在16%时崩解速率可达到最大值,当含水率在20%时崩解性基本消失; 当含水率一定时,崩解速率随干密度的增加而减小; 硝酸污染试样的干密度与含水率对崩解速率的影响与未污染试样崩解速率规律基本一致,且随着酸浓度的增加崩解速率增加.同时,基于试验结果分别建立了干密度、含水率和硝酸浓度与崩解速率的函数关系,并进一步探讨各因素间的相关性.研究结果可为黄土地区环境岩土工程问题及工程地质防灾减灾设计和抢险救灾提供数据支撑和理论依据.
Abstract:
A laboratory test on the remolded loess from Tongchuan adopts self-assembled loess disintegration tester to study the disintegration characteristics of nitro-polluted loess, and makes samples from the loess with different dry density, moisture content and nitric acid concentration for laboratory tests to explore the disintegration evolution law of loess under different conditions. The corresponding disintegration curve was drawn according to the data of laboratory disintegration test. The results showed that when the dry density was fixed, the disintegration velocity first increased and then decreased along with the moisture content. When the moisture content of sample was 16%, the disintegration velocity reached its maximum value, and when the moisture content reached 20%, the disintegration ability basically disappeared. When the moisture content is constant, the disintegration velocity decreases with the increase of dry density. The effects of dry density and moisture content on disintegration velocity are consistent with that of uncontaminated samples. The disintegration velocity increases as the acid concentration increases. At the same time, the functional relationship between dry density, water content and disintegration velocity and concentration of nitric acid and disintegration velocity were established respectively, and the correlation among various factors was further discussed, which provided the basis for the design of geotechnical problems and geological disaster prevention in acid-polluted loess area.

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(编辑 桂智刚)

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备注/Memo

备注/Memo:
收稿日期:2020-08-09 修改稿日期:2021-03-20
基金项目:国家自然科学基金项目(51608436)
第一作者:刘 华(1983-),男,博士,副教授.主要从事环境岩土工程方面研究.E-mail:liuhua029@xauat.edu.cn
更新日期/Last Update: 2021-04-28