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冰川冻土 ›› 2020, Vol. 42 ›› Issue (4): 1195-1201.doi: 10.7522/j.issn.1000-0240.2019.0082

• 寒区工程与灾害 • 上一篇    下一篇

正冻土冻结缘研究现状及展望

王丹1,2(), 杨成松1(), 马巍1, 张莲海1   

  1. 1.中国科学院 西北生态环境资源研究院 冻土工程国家重点实验室,甘肃 兰州 730000
    2.中国科学院大学,北京 100049
  • 收稿日期:2018-04-19 修回日期:2019-07-25 出版日期:2020-12-31 发布日期:2019-05-18
  • 通讯作者: 杨成松 E-mail:dwang1922@lzb.ac.cn;ychsong@lzb.ac.cn
  • 作者简介:王丹(1992 - ), 女, 甘肃张掖人, 2016年在长安大学获学士学位, 现为中国科学院西北生态环境资源研究院在读硕士研究生, 从事冻土物理学及微结构研究. E-mail: dwang1922@lzb.ac.cn
  • 基金资助:
    国家自然科学基金项目(41630636);国家重点研发计划项目(2017YFC0405101)

The status and review of frozen fringe in freezing soils

Dan WANG1,2(), Chengsong YANG1(), Wei MA1, Lianhai ZHANG1   

  1. 1.State Key Laboratory of Frozen Soil Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2018-04-19 Revised:2019-07-25 Online:2020-12-31 Published:2019-05-18
  • Contact: Chengsong YANG E-mail:dwang1922@lzb.ac.cn;ychsong@lzb.ac.cn

摘要:

湿土冻结过程中, 生长发育于冰透镜体与冻结锋面之间特殊的区间带称为冻结缘带。冻结缘作为温度场、 水分场和应力场三场耦合作用的结果, 是冰分凝的水源补给站, 冰水相变发生的剧烈区域以及水分迁移的必经之路, 具有重要的研究意义, 也是深入认识冻胀机理的基础。通过系统地阐述冻结缘的形成过程、 相关理论与试验、 微结构特征、 参数特征及冻结缘的模型构建等5个方面的研究进展及成果, 结合各个方向的发展趋势提出了冻结缘研究的重点, 即对冻结缘的研究应回归到试验研究, 利用新型测试技术深入对冻结缘微结构的观测, 结合物理参数及结构性参数变化构建耦合的冻结缘模型, 从而揭示其热力学机理, 为冻胀机制分析、 冻土精确预报提供理论支撑。

关键词: 正冻土, 冻结缘, 微结构, 特征参数, 冻结缘模型

Abstract:

A special interval zone called frozen fringe developed between the freezing front and ice lens during the freezing process of soil. Frozen fringe as the coupling result of temperature field, moisture field and stress field, which become a water source for ice segregation, the ice-water phase transition zone, and the only way for water migration during soil freezing. Frozen fringe becomes a basic factor to understand the mechanism of frost heave. Therefore, through literature reviewing, recent achievements and progress of the frozen fringe, including the formation of the frozen fringe, theories and experiments, microstructure, characteristic parameters, and the model construction of the frozen fringe, are presented. Furthermore, the development tendency of the frozen fringe is an experimental study. It is urgent to propose a new technique to observe the microstructure of the frozen fringe, and to build better a model with the change of characteristic parameters. Study of frozen fringe is reliable to provide theoretical support for the analysis of frost heave mechanism, and accurate to predict frozen soils.

Key words: freezing soil, frozen fringe, microstructure, characteristic parameters, frozen fringe model

中图分类号: 

  • P642.14