气候变化领域集成服务门户(CCPortal): Thermal regime of conventional embankments along the Qinghai-Tibet Railway in permafrost regions

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DOI	10.1016/j.coldregions.2011.08.005
	Thermal regime of conventional embankments along the Qinghai-Tibet Railway in permafrost regions
	Mu, Yanhu; Ma, Wei; Wu, Qingbai; Sun, Zhizhong; Liu, Yongzhi; Qu, Guangzhou
发表日期	2012
ISSN	0165-232X
EISSN	1872-7441
起始页码	123
结束页码	131
卷号	70
英文摘要	Thermal regime of conventional embankments (CEs) was investigated by compiling ground temperature data from 13 monitoring sites along the Qinghai-Tibet Railway in permafrost regions. The investigation included shallow ground temperatures within embankment, variations of permafrost table and dynamic changes of deep permafrost temperature beneath embankment. The results indicated that the shallow ground temperatures within two embankment shoulders differed from each other; the difference at depth of 50 cm was less than 1 degrees C in warm seasons but more than 2.7 degrees C in cold seasons. Statistic analyses of permafrost table variations beneath CEs confirmed existence of a reasonable height range of CE in regions with mean annual ground temperature (MAGT) < -0.6 to -0.7 degrees C. When the height of CE lay in the range, underlying permafrost tables all had obvious upward movements and could be maintained well with time. By contrast, in regions with MAGT > -0.6 degrees C, permafrost tables either declined (beneath sunny shoulders) or maintained near original level (beneath shady shoulders) at majority sites no matter what the height of CE was. As these permafrost tables were not stable: ground temperatures near them increased slowly with time. Analyses of ground temperature profiles indicated that the deep permafrost beneath CEs all warmed in the contexts of climate warming and construction activities, and this warming trend was more pronounced in warm permafrost regions. Supra-permafrost talik developed and/or permafrost degraded from both permafrost table and permafrost base beneath embankment at some sites with MAGT > -0.5 degrees C. (C) 2011 Elsevier B.V. All rights reserved.
英文关键词	Thermal regime; Conventional embankment; Reasonable embankment height; Permafrost regions; Qinghai-Tibet Railway
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	SLOPES
WOS记录号	WOS:000298775900015
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/240205
作者单位	[Mu, Yanhu; Ma, Wei; Wu, Qingbai; Sun, Zhizhong; Liu, Yongzhi; Qu, Guangzhou] Chinese Acad Sci, CAEERI, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Qu, Guangzhou] Xinjiang Geol & Mineral Bur, Hydrogeol & Engn Geol Explorat Team 1, Urumqi 830091, Peoples R China
推荐引用方式 GB/T 7714	Mu, Yanhu,Ma, Wei,Wu, Qingbai,et al. Thermal regime of conventional embankments along the Qinghai-Tibet Railway in permafrost regions[J]. 中国科学院西北生态环境资源研究院,2012,70.
APA	Mu, Yanhu,Ma, Wei,Wu, Qingbai,Sun, Zhizhong,Liu, Yongzhi,&Qu, Guangzhou.(2012).Thermal regime of conventional embankments along the Qinghai-Tibet Railway in permafrost regions.COLD REGIONS SCIENCE AND TECHNOLOGY,70.
MLA	Mu, Yanhu,et al."Thermal regime of conventional embankments along the Qinghai-Tibet Railway in permafrost regions".COLD REGIONS SCIENCE AND TECHNOLOGY 70(2012).