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冰川冻土 ›› 2019, Vol. 41 ›› Issue (3): 657-668.doi: 10.7522/j.issn.1000-0240.2019.0516

• 寒区科学与技术 • 上一篇    下一篇

冰透镜体形成过程中的土体破裂驱动力研究综述

刘宇航1,2, 李东庆1, 明锋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:2018-07-16 修回日期:2018-12-29 出版日期:2019-06-25 发布日期:2019-09-10
  • 通讯作者: 李东庆,E-mail:dqli@lzb.ac.cn. E-mail:dqli@lzb.ac.cn
  • 作者简介:刘宇航(1993-),女,黑龙江伊春人,2016年在黑龙江大学获学士学位,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,从事冻土物理学研究.E-mail:yhliu1105@163.com
  • 基金资助:
    国家自然科学基金项目(41701060);中国科学院前沿科学重点研究项目(QYZDY-SSW-DQC015)资助

Review on driving forces of soil fracture during ice lens formation process

LIU Yuhang1,2, LI Dongqing1, MING Feng1   

  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:2018-07-16 Revised:2018-12-29 Online:2019-06-25 Published:2019-09-10

摘要: 随着寒区工程高等级化和变形限制要求的进一步严格化,冻胀问题已经成为寒区工程建设考虑的关键问题。造成冻胀的原因在于外界水分迁移冻结并形成冰透镜体,因此,深入认识冰透镜体形成问题对解决实际工程中的冻害问题具有重要的意义。由于冰透镜体的形成受控于土体破裂驱动力,因此,深入开展冻结过程中的土体破裂驱动力研究对阐明冰透镜体的生长机理以及解决工程冻胀问题具有重要的指导意义。通过对国内外在土体冻结过程中的土体破裂驱动力方面的研究进行综合评述,指出各研究结果之间的异同点。基于各研究结果的相同点,分析了目前土体破裂驱动力研究中存在的不足,并提出了今后研究发展的方向。

关键词: 冻胀, 冰透镜体, 力学判据, 土体破裂驱动力, 微观结晶应力

Abstract: With the high-grade engineering in cold regions and the further stringency of deformation restriction requirements, frost heaving is the key issue must be considered in engineering construction in cold regions. The reason of frost heaving is that the water migration and phase change into ice and ice lenses are formed. Therefore, it is important to understand the formation of ice lenses deeply to solve the problem of frost damage in practical engineering. The formation of ice lens is controlled by the driving force of soil fracture, therefore, it is of great significance to do research in the driving force of soil rupture during freezing process for clarifying the growth mechanism of ice lenses and solving the frost heave problem in engineering. In this research, the driving forces of soil rupture during soil freezing at home and abroad were comprehensively reviewed, and the similarities and differences between the results were pointed out. Based on the similarities of the research results, the shortcomings of the current research on driving forces of soil fracture are analyzed, and the future research directions are proposed.

Key words: frost heaving, ice lens, mechanical criterion, driving force of fracture of soil, microcosmic crystallization stress

中图分类号: 

  • P642.14