img

官方微信

img

群号:冰川冻土交流群

QQ群:218834310

高级检索

冰川冻土 ›› 2015, Vol. 37 ›› Issue (1): 132-137.doi: 10.7522/j.issn.1000-0240.2015.0014

• 寒区科学与技术 • 上一篇    下一篇

冻融循环对土结构性影响的机理与定量研究方法

郑郧1,2, 马巍1, 邴慧1   

  1. 1. 中国科学院 寒区旱区环境与工程研究所 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:2014-08-10 修回日期:2014-11-19 出版日期:2015-02-25 发布日期:2015-03-23
  • 通讯作者: 马巍,E-mail:mawei@lzb.ac.cn. E-mail:mawei@lzb.ac.cn
  • 作者简介:郑郧(1986-),女,湖北十堰人,2012年在中国科学院武汉岩土力学研究所获硕士学位,现为中国科学院寒区旱区环境与工程研究所在读博士研究生,主要从事土结构性方面的研究工作.E-mail:yunzheng@lzb.ac.cn
  • 基金资助:

    国家自然科学基金优秀国家重点实验室研究项目(41023003); 国家自然科学基金创新研究群体项目(41121061); 国家自然科学基金项目(41371090); 冻土工程国家重点实验室自主课题(SKLFSE-ZT-08)资助

Impact of freezing and thawing cycles on the structures of soil and a quantitative approach

ZHENG Yun1,2, MA Wei1, BING Hui1   

  1. 1. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2014-08-10 Revised:2014-11-19 Online:2015-02-25 Published:2015-03-23

摘要:

冻融循环对不同土的结构性具有不同的影响效果, 通过探讨冻融循环对土结构性影响的机理, 认为土的三相组成是水分相变和水分迁移的基础; 在冻融过程中, 土的三相比例与分布在不断地发生变化, 导致土的结构性随冻融循环发生改变. 对土的结构性要素进行了讨论, 建立了适于定量分析的结构性要素层次划分体系, 定义"冻融结构势"作为土体结构性的定量参数, 提出用结构性要素在冻融循环过程中的变化率来估计土体的损伤比, 初步探索了冻融循环对土结构性影响的定量研究方法.

关键词: 冻融循环, 结构性, 定量研究

Abstract:

Freezing-thawing cycles have different effects on the structures of different soils. The impact of freezing-thawing cycles on the micro-structure of soil is studied, considering that the three-phase composition of soil is fundamental to the phase change of water and moisture migration among soil particles. The change of proportions of three-phase components and their forms due to freezing-thawing cycles result in the changes in the structures of soil particles. In the paper, the main components in a soil structure system are discussed. A parameter, which is defined as "Structural Potential of Freezing-Thawing", is proposed to quantitatively describe the key components change in the soil fabrics. The degree of the soil damage can be mathematically estimated by the rate of key component change in soil structures due to freezing-thawing cycles.

Key words: freezing-thawing cycles, constitutive property, quantitative approach

中图分类号: 

  • P642.14