Sciences in Cold and Arid Regions ›› 2017, Vol. 9 ›› Issue (5): 438–446.doi: 10.3724/SP.J.1226.2017.00438

• ARTICLES • 上一篇    

A mathematical approach to evaluate maximum frost heave of unsaturated silty clay

Lin Geng1,2,3, XianZhang Ling2,3, Liang Tang2,3, Jun Luo2,3, XiuLi Du1   

  1. 1. Beijing Key Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China;
    2. School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;
    3. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
  • 收稿日期:2017-01-03 修回日期:2017-06-22 发布日期:2018-11-23
  • 通讯作者: Liang Tang,hit_tl@163.com,gl_hit@163.com E-mail:gl_hit@163.com
  • 基金资助:
    We gratefully acknowledge support for this research from the State Key Program of National Natural Science of China (Grant No. 41430634), the National Natural Science Foundation of China (Grant Nos. 41702382, 51578195, 51378161, and 51308547), the Foundation Project Program 973 of China (No. 2012CB026104), and the State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology (Grant No. SKLGDUEK1209).

A mathematical approach to evaluate maximum frost heave of unsaturated silty clay

Lin Geng1,2,3, XianZhang Ling2,3, Liang Tang2,3, Jun Luo2,3, XiuLi Du1   

  1. 1. Beijing Key Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China;
    2. School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;
    3. State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China
  • Received:2017-01-03 Revised:2017-06-22 Published:2018-11-23
  • Contact: Liang Tang,hit_tl@163.com,gl_hit@163.com E-mail:gl_hit@163.com
  • Supported by:
    We gratefully acknowledge support for this research from the State Key Program of National Natural Science of China (Grant No. 41430634), the National Natural Science Foundation of China (Grant Nos. 41702382, 51578195, 51378161, and 51308547), the Foundation Project Program 973 of China (No. 2012CB026104), and the State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology (Grant No. SKLGDUEK1209).

摘要: Maximum frost heave of unsaturated frost-susceptible soils, in conjunction with a high water table, is an important consideration for the design of foundations in seasonally frozen regions. Therefore, it is necessary to evaluate accurately and efficiently the maximum frost heave for a given soil. For this purpose, a series of one-sided freezing experiments was conducted on unsaturated silty clay in an open system. Multistage cooling of sufficient duration was applied to the soil sample's top, while constant above-zero temperatures were maintained at the bottom. Then, a simple methodology for calculating maximum frost heave at a given cooling temperature was derived utilizing information obtained within the limited time allotted for each stage. On this basis, an empirical equation for defining maximum frost heave as a function of cooling temperature and overburden pressure was determined. Overall, this study provides a simple and practical procedure that is applicable to the evaluation of maximum frost heave of unsaturated frost-susceptible soils.

关键词: mathematical approach, maximum frost heave, multistage freezing experiment, unsaturated silty clay

Abstract: Maximum frost heave of unsaturated frost-susceptible soils, in conjunction with a high water table, is an important consideration for the design of foundations in seasonally frozen regions. Therefore, it is necessary to evaluate accurately and efficiently the maximum frost heave for a given soil. For this purpose, a series of one-sided freezing experiments was conducted on unsaturated silty clay in an open system. Multistage cooling of sufficient duration was applied to the soil sample's top, while constant above-zero temperatures were maintained at the bottom. Then, a simple methodology for calculating maximum frost heave at a given cooling temperature was derived utilizing information obtained within the limited time allotted for each stage. On this basis, an empirical equation for defining maximum frost heave as a function of cooling temperature and overburden pressure was determined. Overall, this study provides a simple and practical procedure that is applicable to the evaluation of maximum frost heave of unsaturated frost-susceptible soils.

Key words: mathematical approach, maximum frost heave, multistage freezing experiment, unsaturated silty clay

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