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碱性环境污染土的试验研究

发表时间:2009-01-31  浏览量:1982  下载量:867
全部作者: 王栋,白晓红,牛小玲,常永慧,刘立军
作者单位: 太原理工大学建筑与土木工程学院
摘 要: 随着经济的持续高速发展和人为污染的日益严重,环境问题越来越引起人们的重视。针对碱性环境侵蚀下粉土的物理力学性质研究,对于探讨土体的腐蚀机理,因地制宜地采取整治措施有重要的理论和现实意义。通过室内模拟试验,对受到不同类型和浓度碱溶液侵蚀的粉土进行了物理力学指标的测定,总结了其与侵蚀介质的类型、浓度之间的变化规律,测定了污染源溶液化学成分。结果表明:受NaOH溶液和NH3·H2O溶液侵蚀的土样,随着溶液浓度的变化,其质量、土颗粒相对密度、液限、塑限、塑性指数、压缩系数a1-2、孔隙比均出现不同程度的改变。横向比较两种溶液侵蚀土样的各项指标发现,NaOH对于土样的影响作用要强于NH3·H2O.
关 键 词: 岩土工程;污染土;物理力学指标;碱性环境;溶液侵蚀
Title: Experimental study on soil polluted by alkali
Author: WANG Dong, BAI Xiaohong, NIU Xiaoling, CHANG Yonghui, LIU Lijun
Organization: College of Architecture and Civil Engineering, Taiyuan University of Technology
Abstract: With the sustained rapid economic development and seriously increased man-made pollution, environmental problems have attracted more and more attention. Experimental study on physical and mechanical properties of silt polluted by alkali has theoretical and practical significance to the research of soil erosion mechanism and the adoption of regulation measures. The study on the physical and mechanical properties of silt polluted by alkaline solution of different types and concentrations has been done through the indoor simulation tests, the relationship between physical and mechanical properties and the solution has been analyzed and summarized, and chemical analysis for the solution has been determined too. The experimental results indicate that, as the solution concentration changes, the parameters of soil polluted by NaOH and NH3稨2O solution, such as mass, specific gravity of soil particles, liquid limit, plastic limit, plasticity index, coefficient of compressibility a1-2, and void ratio have changed variously. Comparison between soil samples eroded by these two kinds of solution, the former has greater impact on soil samples than the latter one.
Key words: geotechnical engineering; polluted soil; physical and mechanical properties; alkaline environment; solution erosion
发表期数: 2009年1月第2期
引用格式: 王栋,白晓红,牛小玲,等. 碱性环境污染土的试验研究[J]. 中国科技论文在线精品论文,2009,2(2):181-186.
 
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