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膨润土系隔离墙材料渗透特性研究综述

杨玉玲, 杜延军, 范日东, 魏明俐

杨玉玲, 杜延军, 范日东, 魏明俐. 膨润土系隔离墙材料渗透特性研究综述[J]. 岩土工程学报, 2015, 37(zk2): 210-216. DOI: 10.11779/CJGE2015S2040
引用本文: 杨玉玲, 杜延军, 范日东, 魏明俐. 膨润土系隔离墙材料渗透特性研究综述[J]. 岩土工程学报, 2015, 37(zk2): 210-216. DOI: 10.11779/CJGE2015S2040
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YANG Yu-ling, DU Yan-jun, FAN Ri-dong, WEI Ming-li. Advances in permeability for bentonite-based hydraulic containment barriers[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(zk2): 210-216. DOI: 10.11779/CJGE2015S2040
Citation: YANG Yu-ling, DU Yan-jun, FAN Ri-dong, WEI Ming-li. Advances in permeability for bentonite-based hydraulic containment barriers[J]. Chinese Journal of Geotechnical Engineering, 2015, 37(zk2): 210-216. DOI: 10.11779/CJGE2015S2040
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膨润土系隔离墙材料渗透特性研究综述  English Version

  • 1. 东南大学岩土工程研究所,江苏 南京 210096; 2. 江苏省城市地下工程与环境安全重点实验室,江苏 南京 210096

基金项目: 国家自然科学基金项目（51278100）; 江苏省自然科学基金; 项目（BK2012022）
详细信息
    作者简介:

    杨玉玲(1986- ),女,广西贵港人,博士研究生,主要从事环境岩土方面的研究。

Advances in permeability for bentonite-based hydraulic containment barriers

  • 1. Institute of Geotechnical Engineering, Southeast University, Nanjing 210096, China; 2. Jiangsu Key Laboratory of Urban Underground Engineering and Environmental Safety (Southeast University), Nanjing 210096, China;

摘要

    摘要
  • 摘要: 渗透特性是隔离墙材料的主要工程特征之一。根据大量文献中有关隔离墙材料渗透特性的相关报道,对比介绍了隔离墙材料渗透系数室内测试技术,总结分析了材料特性和化学溶液特性对渗透系数的影响规律。结果表明：渗透试验终止条件的合理选择对正确评价隔离墙材料长期渗透特性起决定性作用;级配较好的原位土可使材料渗透系数降低;渗透系数随膨润土掺量和双电层厚度增加而减小;溶液阳离子价数和离子浓度升高、溶液介电常数降低均可使渗透系数产生不同程度增大;膨润土预水化作用和离子水化半径对材料渗透特性的影响机制尚不完全明确。建议深入研究典型污染物和复合污染物与隔离墙材料间的相互作用,积极推广低质量膨润土及其改性土在中国隔离墙技术中的应用。
    Abstract: Permeability is one of the most important engineering properties of the barriers. The permeability of the barriers is overviewed based on literature studies. The performances of various laboratory test methods are compared, and the effects of properties of barrier materials as well as chemical solution conditions on hydraulic conductivity of the barriers are summarized. The results show that the accuracy of long-term performance evaluation of the barriers depends on proper selection of the test termination criteria. Well graded in-situ soil benefits the permeability resistance of the barriers. The hydraulic conductivity generally increases with the decrease in bentonite content in the barriers, in thickness of decreases electrical double layer of the bentonite, increases in cation valence and cation concentration, and/or decreases in dielectric constant of the chemical solution. The influence mechanism of prehydration of the bentonite and hydrated ionic radius on the permeability of the barriers is not fully clear. Finally, it is suggested that further researches on interaction between bentonite-based barrier and typical contaminant or multiple contaminant should be conducted, and applications of low-quality bentonite and/or its amended product should be promoted in China.
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    • 参考文献(31)
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出版历程
  • 收稿日期:  2015-03-25
  • 发布日期:  2015-07-24

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