气候变化领域集成服务门户(CCPortal): Study on the coupled heat-water-vapor-mechanics process of unsaturated soils

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DOI	10.1016/j.jhydrol.2020.124784
	Study on the coupled heat-water-vapor-mechanics process of unsaturated soils
	Bai, Ruiqiang; Lai, Yuanming; Zhang, Mingyi; Ren, Jingge
发表日期	2020
ISSN	0022-1694
EISSN	1879-2707
卷号	585
英文摘要	Freezing of unsaturated soils jointly involves heat transfer, water-vapor migration, water-ice and water-vapor phase changes and deformation. To understand this freezing, we conducted a series of one-dimensional freezing tests to study the influences of the initial water content and cooling temperature on the water-vapor migration and deformation of unsaturated soils. Results show that the initial water content determines the water and vapor migration intensity and deformation of unsaturated soils. Vapor migrates prominently and frost heave develops slowly when the initial water content is lower than a critical value. Above this value, the liquid water migration dominates, and frost heave develops rapidly. It is also found that the cooling temperature dominates water and vapor fluxes in such a manner that a higher cooling temperature leads to faster migrations of water and vapor in unsaturated soil. We further analyzed the coupled heat-water-vapor-mechanics process of unsaturated soils and proposed a coupled heat-water-vapor-mechanics model. The simulated temperatures, volumetric water content, and displacement agree well with those measured data, validating that the model can describe effectively the coupled heat-water-vapor-mechanics process in freezing unsaturated soils.
英文关键词	Unsaturated soils; Water migration; Vapor migration; Frost heave; Heat-water-vapor-mechanics process
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS关键词	FURROW-IRRIGATED SOIL ; POROUS-MEDIA ; HYDRAULIC CONDUCTIVITY ; 2-DIMENSIONAL MODEL ; SOLUTE TRANSPORT ; FROZEN SOIL ; MOISTURE ; EVAPORATION ; SIMULATION ; DIFFUSION
WOS记录号	WOS:000544230000045
来源期刊	JOURNAL OF HYDROLOGY
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/239571
作者单位	[Bai, Ruiqiang; Lai, Yuanming; Zhang, Mingyi; Ren, Jingge] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Bai, Ruiqiang; Lai, Yuanming; Zhang, Mingyi; Ren, Jingge] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Bai, Ruiqiang,Lai, Yuanming,Zhang, Mingyi,et al. Study on the coupled heat-water-vapor-mechanics process of unsaturated soils[J]. 中国科学院西北生态环境资源研究院,2020,585.
APA	Bai, Ruiqiang,Lai, Yuanming,Zhang, Mingyi,&Ren, Jingge.(2020).Study on the coupled heat-water-vapor-mechanics process of unsaturated soils.JOURNAL OF HYDROLOGY,585.
MLA	Bai, Ruiqiang,et al."Study on the coupled heat-water-vapor-mechanics process of unsaturated soils".JOURNAL OF HYDROLOGY 585(2020).