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A mathematical approach to evaluate maximum frost heave of unsaturated silty clay
Received:January 03, 2017  Revised:June 22, 2017  Click here to download the full text
Citation of this paper:Lin Geng,XianZhang Ling,Liang Tang,Jun Luo,XiuLi Du,2017.A mathematical approach to evaluate maximum frost heave of unsaturated silty clay.Sciences in Cold and Arid Regions,9(5):438~446.
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Author NameAffiliationE-mail
Lin Geng Beijing Key Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China;School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China  
XianZhang Ling School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China  
Liang Tang School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China gl_hit@163.com 
Jun Luo School of Civil Engineering, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China;State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China  
XiuLi Du Beijing Key Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology, Beijing 100124, China  
基金项目: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).
 
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.
keywords:mathematical approach  maximum frost heave  multistage freezing experiment  unsaturated silty clay
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