气候变化领域集成服务门户(CCPortal): Investigation of embankment with temperature-controlled ventilation along the Qinghai-Tibet Railway

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DOI	10.1016/j.coldregions.2007.07.002
	Investigation of embankment with temperature-controlled ventilation along the Qinghai-Tibet Railway
	Yu Qihao; Niu Fujun; Pan Xicai; Bai Yang; Zhang Mingyi
发表日期	2008
ISSN	0165-232X
EISSN	1872-7441
起始页码	193
结束页码	199
卷号	53 期号:2
英文摘要	The temperature-controlled ventilated embankment (TCVE) is an improved engineering measure developed based on the duct ventilated embankment (DVE). The improved cooling effect of the TCVE is a result of enhanced heat exchange through controlling air convection in the ventilated ducts of the DVE. The field observational data from a TCVE testing section at Beiluhe, about midway in the Qinghai-Tibet Railway permafrost zone, indicates that restricting the air convection in the ducts during warm season can reduce the embankment heat absorption in the embankment. The results also indicate that the temperature in the wells of the ducts of the TCVE was about 1.0 degrees C lower than the temperature in the walls of the ducts of DVE. Especially it was found that in the seasonal ground temperature-decreasing period, the temperature of the permafrost at a depth of 3.5 in below the base of the embankment in TCVE decreased faster than at the same depth below the DVE. Two years after the TCVE was implemented, the temperature at a depth of 3.5 m below the embankment base was found 0.45 degrees C lower than at the same location below the DVE. Thermal modeling of the embankments shows that the mean annual heat loss of a TCVE is about twice that with the DVE, which means a doubled cooling effect of TCVE over DVE if think in this way. In addition, the cooling period with a TCVE is about 40 days longer than with a DVE, which contributes to its cooling effects. (c) 2007 Elsevier B.V. All rights reserved.
英文关键词	Qinghai-Tibet railway; temperature-controlled ventilated embankment; cooling effect
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	PERMAFROST REGIONS ; THERMAL INSULATION
WOS记录号	WOS:000257616200006
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/240144
作者单位	[Yu Qihao; Niu Fujun; Pan Xicai; Bai Yang; Zhang Mingyi] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Yu Qihao,Niu Fujun,Pan Xicai,et al. Investigation of embankment with temperature-controlled ventilation along the Qinghai-Tibet Railway[J]. 中国科学院西北生态环境资源研究院,2008,53(2).
APA	Yu Qihao,Niu Fujun,Pan Xicai,Bai Yang,&Zhang Mingyi.(2008).Investigation of embankment with temperature-controlled ventilation along the Qinghai-Tibet Railway.COLD REGIONS SCIENCE AND TECHNOLOGY,53(2).
MLA	Yu Qihao,et al."Investigation of embankment with temperature-controlled ventilation along the Qinghai-Tibet Railway".COLD REGIONS SCIENCE AND TECHNOLOGY 53.2(2008).