气候变化领域集成服务门户(CCPortal): Water-vapor-heat behavior in a freezing unsaturated coarse-grained soil with a closed top

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DOI	10.1016/j.coldregions.2018.08.007
	Water-vapor-heat behavior in a freezing unsaturated coarse-grained soil with a closed top
	Bai, Ruiqiang; Lai, Yuanming; Zhang, Mingyi; Gao, Jianqiang
发表日期	2018
ISSN	0165-232X
EISSN	1872-7441
起始页码	120
结束页码	126
卷号	155
英文摘要	A series of one-side freezing experiments with closed tops were performed to illustrate moisture migration and frost heave mechanisms of the coarse-grained soil for high speed railway subgrades in cold regions, as well as silty clay and standard sand as controls. The experimental results show that the pot effect can be formed in the soils with different unsaturated porosities when their tops are closed. The vapor migration and frost heave of unsaturated soils become more significant under larger temperature gradient. Water supply can not determine the formation of the pot effect, and only influence its intensity. Vapor migration is prominent when the initial water contents of soils are low (e.g. saturation of 30%), however, the water migration is dominant when the initial moistures of soils are high (e.g. saturation of 70%). It is also found that the initial water contents of the soils only influence the in-situ frost heave amounts; however, the total frost heave amounts are related to the combined actions of soil frost susceptibility and water migration, etc.
英文关键词	Closed top; Pot effect; Moisture migration; Frost susceptibility; Unsaturated coarse-grained soil; One-side freezing
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	MECHANICAL-BEHAVIOR ; SILTY SAND ; FROZEN ; TRANSPORT ; FINES ; MODEL
WOS记录号	WOS:000444514700012
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239463
作者单位	[Bai, Ruiqiang; Lai, Yuanming; Zhang, Mingyi; Gao, Jianqiang] 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; Gao, Jianqiang] 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. Water-vapor-heat behavior in a freezing unsaturated coarse-grained soil with a closed top[J],2018,155.
APA	Bai, Ruiqiang,Lai, Yuanming,Zhang, Mingyi,&Gao, Jianqiang.(2018).Water-vapor-heat behavior in a freezing unsaturated coarse-grained soil with a closed top.COLD REGIONS SCIENCE AND TECHNOLOGY,155.
MLA	Bai, Ruiqiang,et al."Water-vapor-heat behavior in a freezing unsaturated coarse-grained soil with a closed top".COLD REGIONS SCIENCE AND TECHNOLOGY 155(2018).