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	The thermal effect of strengthening measures in an insulated embankment in a permafrost region
	Hou Yandong1,3; Wu Qingbai1,2; Liu Yongzhi1,2; Zhang Zhongqiong1; Gao Siru1,3
刊名	Cold regions science and technology
	2015-08-01
卷号	116页码:49-55
关键词	Qinghai-xizang railway Strengthening measures Permafrost table Second rising process
ISSN号	0165-232X
DOI	10.1016/j.coldregions.2015.04.003
通讯作者	Wu qingbai(qbwu@lzb.ac.cn)
英文摘要	An embankment with heat insulation can only retard a rise in temperature or the thawing of permafrost, and the thermal stability of the embankment cannot be maintained under global warming conditions. therefore, strengthening measures are required to ensure embankment stability. based on in-situ observational data from the qinghai-xizang railway in beiluhe, variations in the thermal regime under a thermally insulated embankment after the implementation of strengthening measures were analysed. the results show that the strengthening measure of thermosyphon installation can play an effective role in the embankment cooling process; however, no protective effect of the spall rock revetment was observed. the shallow mean annual maximum temperature in the upper 0.5 m of soil decreased from 2.2 to 0 degrees c with an average of 1.8 degrees c, appearing as a striking "cold energy accumulation" process which predominantly results from thermosyphons and heat insulation material, after the strengthening measures were implemented. meanwhile, the permafrost table under the embankment appeared as a "second rising process", ranging from 0.90 m for dk1139 + 670 to 2.56 m for dk1139 + 780, with an average of 1.66 m. the "sunny shady slope effect" was not well controlled after the implementation of the strengthening measures under the embankment with thermal insulation. however, the difference in temperature between the ground and underlying permafrost table, under the left and right shoulder of the embankment, gradually decreased. besides, thermal influence of the embankment to the surrounding permafrost in the deep layer is observed to be eliminated after the implementation of the strengthening measures. (c) 2015 elsevier b.v. all rights reserved.
WOS关键词	PROTECTION ; THERMOSIPHON ; HIGHWAY ; PLATEAU ; RAILWAY ; SLOPES
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000356122800006
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2376742
专题	中国科学院大学
通讯作者	Wu Qingbai
作者单位	1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Engn, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Beiluhe Observat & Res Stn, Lanzhou 730000, Peoples R China 3.Univ Chinese Acad Sci, Sch Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Hou Yandong,Wu Qingbai,Liu Yongzhi,et al. The thermal effect of strengthening measures in an insulated embankment in a permafrost region[J]. Cold regions science and technology,2015,116:49-55.
APA	Hou Yandong,Wu Qingbai,Liu Yongzhi,Zhang Zhongqiong,&Gao Siru.(2015).The thermal effect of strengthening measures in an insulated embankment in a permafrost region.Cold regions science and technology,116,49-55.
MLA	Hou Yandong,et al."The thermal effect of strengthening measures in an insulated embankment in a permafrost region".Cold regions science and technology 116(2015):49-55.

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