Stress Effects on Soil Freezing Characteristic Curve: Equipment Development and Experimental Results

doi:10.2136/vzj2018.11.0199

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地灾害与地表过程重点实验室

	Stress Effects on Soil Freezing Characteristic Curve: Equipment Development and Experimental Results
	Mu, Q. Y.1; Zhou, C.2; Ng, C. W. W.3; Zhou, G. G. D.4
刊名	VADOSE ZONE JOURNAL
	2019-07-25
卷号	18 期号:1 页码:10
ISSN号	1539-1663
DOI	10.2136/vzj2018.11.0199
通讯作者	Zhou, C.(c.zhou@polyu.edu.hk)
英文摘要	The soil freezing characteristic curve (SFCC) defines the relationship between soil temperature and unfrozen water content. This curve is important for predicting water flow and heat conduction in frozen soils, as well as freezing heave and thawing settlement. So far, SFCCs reported in the literature were usually determined at zero stress. To investigate stress effects on SFCC, a stress- and temperature-controlled triaxial apparatus was developed in this study. The unfrozen volumetric water content was measured using a newly developed noninvasive time domain reflectometry (TDR) probe. The new apparatus was used to measure SFCCs of two typical soils (i.e., clay and sand) at different stress conditions (i.e., 30, 100, and 200 kPa). Each specimen was subjected to compression, and then a cycle of freezing and thawing. As expected, for both soils, the saturated water content prior to freezing was smaller at higher stresses because of compression. During the subsequent freezing and thawing, the soil specimen at a higher stress was able to retain more liquid water than that at a lower stress. The higher unfrozen water retention capacity at higher stresses is mainly because the pore size of a soil specimen becomes smaller during compression. Hence, more water can retain a liquid state due to the enhanced capillarity. On the other hand, stress effects on the SFCC were found to be more significant for clay than for sand. This is likely because the stress-induced change in pore size distribution is larger in clay due to its higher compressibility.
资助项目	Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS)[QYZDB-SSW-DQC010] ; Youth Innovation Promotion Association CAS ; Research Grants Council of the Hong Kong Special Administrative Region (HKSAR)[16204817] ; Research Grants Council of the Hong Kong Special Administrative Region (HKSAR)[AoE/E-603/18] ; Innovative Talents Pro-motion Plan in Shaanxi Province, China[2018KJXX-033] ; China Postdoctoral Science Foundation[2018M631166] ; Fundamental Research Funds for the Central Universities of China[xjj2018250]
WOS关键词	TIME-DOMAIN REFLECTOMETRY ; UNFROZEN WATER ; DIELECTRIC-CONSTANT ; UNSATURATED SOIL ; POROUS-MEDIA ; LIQUID WATER ; VOID RATIO ; MODEL ; SENSITIVITY ; CALIBRATION
WOS研究方向	Environmental Sciences & Ecology ; Agriculture ; Water Resources
语种	英语
出版者	SOIL SCI SOC AMER
WOS记录号	WOS:000477608800001
资助机构	Key Research Program of Frontier Sciences, Chinese Academy of Sciences (CAS) ; Youth Innovation Promotion Association CAS ; Research Grants Council of the Hong Kong Special Administrative Region (HKSAR) ; Innovative Talents Pro-motion Plan in Shaanxi Province, China ; China Postdoctoral Science Foundation ; Fundamental Research Funds for the Central Universities of China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/26774]
专题	成都山地灾害与环境研究所_山地灾害与地表过程重点实验室
通讯作者	Zhou, C.
作者单位	1.Xi An Jiao Tong Univ, Dept Civil Engn, Xian, Shaanxi, Peoples R China 2.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Hong Kong, Peoples R China 3.Hong Kong Univ Sci & Technol, Dept Civil & Environm Engn, Kowloon, Clear Water Bay, Hong Kong, Peoples R China 4.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Earth Surface Proc, Chengdu, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Mu, Q. Y.,Zhou, C.,Ng, C. W. W.,et al. Stress Effects on Soil Freezing Characteristic Curve: Equipment Development and Experimental Results[J]. VADOSE ZONE JOURNAL,2019,18(1):10.
APA	Mu, Q. Y.,Zhou, C.,Ng, C. W. W.,&Zhou, G. G. D..(2019).Stress Effects on Soil Freezing Characteristic Curve: Equipment Development and Experimental Results.VADOSE ZONE JOURNAL,18(1),10.
MLA	Mu, Q. Y.,et al."Stress Effects on Soil Freezing Characteristic Curve: Equipment Development and Experimental Results".VADOSE ZONE JOURNAL 18.1(2019):10.