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DOI	10.1016/j.ijheatmasstransfer.2020.120718
	Comparison of the hydraulic conductivity between saturated frozen and unsaturated unfrozen soils
	Chen, Lei; Ming, Feng; Zhang, Xiyan; Wei, Xiaobin; Liu, Yuhang
通讯作者	Ming, F (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0017-9310
EISSN	1879-2189
卷号	165
英文摘要	Knowledge of the hydraulic conductivity of warm frozen soil is crucial for accurately calculating the deformation of buildings built in permafrost, and the objective of this study is to provide an experimental and theoretical method for obtaining the hydraulic conductivity of warm saturated frozen soil. The permeability experiments were carried out on warm frozen soil in the low temperature rock triaxial testing system, which provides a precise measurement of the water flow rate through the warm frozen soil. Repeated experiments were conducted to verify the validity of the experimental results. Subsequently, based on the experimental results and given the shortcomings of the ice impedance model, the equivalent model was proposed to predict the hydraulic conductivity of saturated frozen soil. The model suggested that saturated frozen soil and unsaturated unfrozen soil with the same liquid water content have the same hydraulic conductivity. To illustrate the validity of the model, the predictions of seven hydraulic conductivity models for unsaturated unfrozen soil were compared with the measured hydraulic conductivity of saturated frozen soil. The results show that the predictions are close to the measured data, which shows the validity of the model. Thus, the hydraulic conductivity of saturated frozen soil can be directly predicted by the hydraulic conductivity model for unsaturated unfrozen soil. The results provide a new method for obtaining the hydraulic conductivity of saturated frozen soil, which can provide a reference for the design and construction of buildings built in permafrost. (C) 2020 Elsevier Ltd. All rights reserved.
关键词	CRUDE-OIL PIPELINE PERMAFROST REGIONS MODEL HEAT EQUATION
英文关键词	Warm saturated frozen soil; Unsaturated unfrozen soil; Hydraulic conductivity; Soil water characteristic curve
语种	英语
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
WOS类目	Thermodynamics ; Engineering, Mechanical ; Mechanics
WOS记录号	WOS:000596070000028
来源期刊	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/253849
作者单位	[Chen, Lei; Ming, Feng; Zhang, Xiyan; Wei, Xiaobin; Liu, Yuhang] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Chen, Lei; Zhang, Xiyan; Wei, Xiaobin; Liu, Yuhang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Chen, Lei,Ming, Feng,Zhang, Xiyan,et al. Comparison of the hydraulic conductivity between saturated frozen and unsaturated unfrozen soils[J]. 中国科学院西北生态环境资源研究院,2021,165.
APA	Chen, Lei,Ming, Feng,Zhang, Xiyan,Wei, Xiaobin,&Liu, Yuhang.(2021).Comparison of the hydraulic conductivity between saturated frozen and unsaturated unfrozen soils.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,165.
MLA	Chen, Lei,et al."Comparison of the hydraulic conductivity between saturated frozen and unsaturated unfrozen soils".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 165(2021).