气候变化领域集成服务门户(CCPortal): Thermal effect of rainwater infiltration into a replicated road embankment in a cold environmental chamber

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DOI	10.1016/j.coldregions.2018.12.008
	Thermal effect of rainwater infiltration into a replicated road embankment in a cold environmental chamber
	Liu, Weibo; Yu, Wenbing; Fortier, Richard; Chen, Lin; Lu, Yan; Zhang, Mingyi; Hu, Da
发表日期	2019
ISSN	0165-232X
EISSN	1872-7441
起始页码	47
结束页码	57
卷号	159
英文摘要	A laboratory experiment was performed to investigate the thermal effect of rainwater infiltration into a one-half scale replicated road embankment built on artificial permafrost subjected to four 15-day freeze-thaw cycles and several rainfall events during thaw periods in a cold environmental chamber. The ground temperature, water content, and heat flux were monitored at different depths at three key locations in the road subbase. Based on the experimental results, the rainwater infiltration has a significant heating effect on the shallow subbase layers down to a depth no more than 30 cm. The heat transfer in the road embankment is directly correlated to the amount of rainfall. Moreover, rainwater infiltration has different heating effects according to the locations in the road subbase. The most important heating effect is underneath the embankment slope, the second one in the embankment shoulder, and the third one underneath the concrete pavement. The changes in temperature, moisture, and heat flux in the road subbase due to the rainwater infiltration are delayed and attenuated with the increase in depth. Even if the road subbase was frozen at these depths, moisture changes in the road subbase as deep as 60 cm were observed. The volumetric unfrozen water content in the road subbase and subgrade depends on the ground temperature and exhibits hysteretic behavior during cooling and warming cycles. The observed variations in heat flux are related to the changes in temperature and moisture in the road subbase. For road embankments located in permafrost environments, the thermal effect of rainwater infiltration into the road subbase may lead to permafrost degradation at depth.
英文关键词	Rainwater infiltration; Heat transfer; Experimental study; Thermal impacts; Road embankment; Permafrost degradation
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	HYDRAULIC CONDUCTIVITY ; WATER-CONTENT ; PERMAFROST REGIONS ; SOIL-TEMPERATURE ; STABILITY ; RUNOFF ; SLOPE ; LAYER
WOS记录号	WOS:000458369700006
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
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/240136
作者单位	[Liu, Weibo; Yu, Wenbing; Lu, Yan; Zhang, Mingyi] Chinese Acad Sci, Northwest Inst Eco Environm & Resources, State Key Lab Frozen Soil Engn, Lanzhou, Gansu, Peoples R China; [Yu, Wenbing] Chongqing Jiaotong Univ, Sch Civil Engn, Chongqing, Peoples R China; [Fortier, Richard] Univ Laval, Ctr Etud Nord, Quebec City, PQ G1V 0A6, Canada; [Chen, Lin] Univ Montreal, Geog Dept, 520 Ch Cote Ste Catherine, Montreal, PQ H2V 2B8, Canada; [Hu, Da] Texas Tech Univ, Dept Civil Engn, Lubbock, TX 79409 USA
推荐引用方式 GB/T 7714	Liu, Weibo,Yu, Wenbing,Fortier, Richard,et al. Thermal effect of rainwater infiltration into a replicated road embankment in a cold environmental chamber[J]. 中国科学院西北生态环境资源研究院,2019,159.
APA	Liu, Weibo.,Yu, Wenbing.,Fortier, Richard.,Chen, Lin.,Lu, Yan.,...&Hu, Da.(2019).Thermal effect of rainwater infiltration into a replicated road embankment in a cold environmental chamber.COLD REGIONS SCIENCE AND TECHNOLOGY,159.
MLA	Liu, Weibo,et al."Thermal effect of rainwater infiltration into a replicated road embankment in a cold environmental chamber".COLD REGIONS SCIENCE AND TECHNOLOGY 159(2019).