王施涵,牛富俊,张恒

• 1:华南理工大学亚热带建筑科学国家重点实验室
• 2:华南理工大学华南岩土工程研究院

摘要(Abstract)：

随着纳米技术的发展和多学科的交叉应用,纳米材料作为一种新型添加剂应用于土体改良。为深入认识纳米材料对土体性质产生的影响以及作用机理,提高对纳米技术与岩土工程之间关系的理解,对不同类型纳米材料在土体改性方面的研究现状、有效性、适用性进行回顾与总结。重点讨论了纳米硅溶胶、纳米二氧化硅、纳米黏土矿物、纳米氧化铝等纳米材料对土体改性的影响,结合宏观力学性质以及微观结构变化解释纳米颗粒与土颗粒之间的相互作用机制。纳米粉末状颗粒通过提高抗压强度、降低水力传导系数加固土体;利用纳米硅溶胶、膨润土悬浮液、硅酸镁锂的可渗透性和触变性缓解土体液化。尽管相关试验研究表明添加少量纳米材料可引起土体性质的显著改善,但是大部分研究仍局限于室内试验,需要进一步探索易于现场施工、成本低、环境友好的新方法和新技术。

关键词(KeyWords)： 纳米技术;纳米材料;土体改性;水力传导系数;土体液化;作用机理;膨胀土;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金青年基金项目(41901074);; 中国科学院科技服务网络计划(STS计划)项目(KFJ-STS-ZDTP-037)

作者(Author): 王施涵,牛富俊,张恒

DOI: 10.13928/j.cnki.wrahe.2021.04.023

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