IMHE OpenIR  > 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
Corresponding AuthorZhou, C.(c.zhou@polyu.edu.hk)
2019-07-25
Source PublicationVADOSE ZONE JOURNAL
ISSN1539-1663
Volume18Issue:1Pages:10
AbstractThe 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.
DOI10.2136/vzj2018.11.0199
Indexed BySCI
WOS KeywordTIME-DOMAIN REFLECTOMETRY ; UNFROZEN WATER ; DIELECTRIC-CONSTANT ; UNSATURATED SOIL ; POROUS-MEDIA ; LIQUID WATER ; VOID RATIO ; MODEL ; SENSITIVITY ; CALIBRATION
Language英语
Funding ProjectKey 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 Research AreaEnvironmental Sciences & Ecology ; Agriculture ; Water Resources
WOS SubjectEnvironmental Sciences ; Soil Science ; Water Resources
WOS IDWOS:000477608800001
Funding OrganizationKey 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
PublisherSOIL SCI SOC AMER
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Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/26774
Collection山地灾害与地表过程重点实验室
Corresponding AuthorZhou, C.
Affiliation1.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
Recommended Citation
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.
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