Stress Effects on Soil Freezing Characteristic Curve: Equipment Development and Experimental Results
文献类型：期刊论文
| 作者 | Mu, Q. Y.1; Zhou, C.2; Ng, C. W. W.3; Zhou, G. G. D.4 |
| 刊名 | VADOSE ZONE JOURNAL
 |
| 出版日期 | 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. |
| WOS关键词 | TIME-DOMAIN REFLECTOMETRY ; UNFROZEN WATER ; DIELECTRIC-CONSTANT ; UNSATURATED SOIL ; POROUS-MEDIA ; LIQUID WATER ; VOID RATIO ; MODEL ; SENSITIVITY ; CALIBRATION |
| 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 |
| 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. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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