土工基础

›› 2019, Vol. 33 ›› Issue (3): 299-304.

• 工程实录 • 上一篇    下一篇

膨胀土收缩特性的研究进展

牟 智1，刘观仕2，陈如意1，莫燕坤1，盛鸾翔3   

  1. （1.桂林理工大学  广西岩土力学与工程重点实验室，广西桂林 541004；2.中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室，武汉 430071；3.武汉中科科创工程检测有限公司，武汉 430000）
  • 收稿日期:2019-09-10 修回日期:2019-09-19 出版日期:2019-06-20 发布日期:2019-08-16
  • 通讯作者: 刘观仕（1974-），男，博士，副研究员，研究方向为膨胀土裂隙等。
  • 作者简介:牟 智(1994-)，男，硕士研究生，研究方向为岩土工程方面。
  • 基金资助:

    国家自然科学基金资助项目（51279200）

Developments of Characterization of the Shrinkage Properties of Expansive Soils

MU Zhi1, LIU Guanshi2, CHEN Ruyi1, MO Yankun1， SHENG Luanxiang3   

  1. (1.Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering, Guilin University of Technology, Guilin 541004；
    2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071;3.Wuhan Zhongke Kechuang Engineering Testing Co., Ltd., Wuhan 430071)
  • Received:2019-09-10 Revised:2019-09-19 Online:2019-06-20 Published:2019-08-16

摘要： 膨胀土失水后会发生体积收缩，进而产生裂隙，对其力学与工程特性具有重要影响，有关膨胀土收缩的研究也一直备受关注，也取得了多方面的进展。介绍了膨胀土收缩的基本特征、主要影响因素、收缩机理、收缩模型等方面的研究方法与成果，简要分析了存在的问题与不足。建议从以下几方面深化对膨胀土收缩特性的研究：矿物成分及含量与膨胀土收缩特性的关系；考虑膨胀土黏土矿物晶体结构与收缩机理的关系；结构性对土体收缩特性的影响。

关键词: 膨胀土, 收缩机理, 收缩模型, 矿物成分

Abstract: The volume shrinkage of expansive soils will occur after water loss, which will ultimately lead to cracks. Due to which it has an important impact on its Mechanical and Engineering properties. Therefore the research on expansive soils shrinkage has been paid much attention and made many progress. In this paper, the basic characteristics, main influencing factors, shrinkage mechanism and shrinkage model of expansive soil are introduced along with existing problems and shortcomings are briefly analyzed. It is concluded that the study on shrinkage characteristics of expansive soils should be deepened from the following aspects: the relationship between mineral composition and content; shrinkage characteristics of expansive soils; the relationship between crystal structure and shrinkage mechanism of expansive clay minerals; and the influence of structure on shrinkage characteristics of expansive soils.

Key words: Expansive Soils； Contraction Mechanism, Contraction Model, Mineral Compositions