Soil freezing process and different expressions for the soil-freezing characteristic curve

作     者：Jun Ping Ren Sai K.Vanapalli Zhong Han 

作者机构：Department of Civil Engineering University of Ottawa School of Civil Engineering Wuhan University 

出 版 物：《Research in Cold and Arid Regions》 (寒旱区科学（英文版）)

年 卷 期：2017年第9卷第3期

页      面：221-228页

核心收录：

学科分类：07[理学] 081401[工学-岩土工程] 08[工学] 0705[理学-地理学] 070501[理学-自然地理学] 0814[工学-土木工程] 

基　　金：China Scholarship Council (CSC)-University of Ottawa joint scholarshipChina Scholarship Council Natural Sciences and Engineering Research Council of Canada (NSERC)Natural Sciences and Engineering Research Council of Canada (NSERC) Ministry of Transportation of Ontario (MTO) 

主　　题：frozen soil soil-freezing characteristic curve Clapeyron equation soil-water characteristic curve unfrozen water content 

摘      要：The soil-freezing characteristic curve(SFCC),which represents the relationship between unfrozen water content and subfreezing temperature(or suction at ice-water interface)in a freezing soil,can be used for understanding the transportation of heat,water,and solute in frozen *** this paper,the soil freezing process and the similarity between the SFCC of saturated frozen soil and soil-water characteristic curve(SWCC)of unfrozen unsaturated soil are *** on similar characteristics between SWCC and SFCC,a conceptual SFCC is drawn for illustrating the main features of soil freezing and thawing *** SFCC expressions from the literature are *** widely used expressions(i.e.,power relationship,exponential relationship,van Genuchten 1980 equation and Fredlund and Xing 1994 equation)are evaluated using published experimental data on four different soils(i.e.,sandy loam,silt,clay,and saline silt).Results show that the exponential relationship and van Genuchten(1980)equation are more suitable for sandy *** simple power relationship can be used to reasonably best-fit the SFCC for soils with different particle sizes;however,it exhibits limitations when fitting the saline silt *** Fredlund and Xing(1994)equation is suitable for fitting the SFCCs for all soils studied in this paper.