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	Thermal performance of a combined cooling method of thermosyphons and insulation boards for tower foundation soils along the Qinghai-Tibet Power Transmission Line
	Mu, Yanhu1; Wang, Guoshang2; Yu, Qihao1; Li, Guoyu1; Ma, Wei1; Zhao, Shuping1
刊名	COLD REGIONS SCIENCE AND TECHNOLOGY
	2016
卷号	121页码:226-236
关键词	Tower footing Thermosyphon Insulation board Climate warming Qinghai-Tibet Power Transmission Line
ISSN号	0165-232X
DOI	10.1016/j.coldregions.2015.06.006
通讯作者	Yu, Qihao(yuqh@lzb.ac.cn)
英文摘要	Preliminary field observations along the Qinghai-Tibet Power Transmission Line (QTPTL) show that foundation soils of some shallow footings (with an embedding depth of 3.7 m) with thermosyphons in permafrost regions still suffer substantial and rapid thaw settlement in warm seasons. In this paper, a series of numerical simulations on the long-term thermal performance of foundation soils of these shallow footings are carried out. The simulated results show that thermosyphons could do effectively cool foundation soils at depths 2.5 to 8.0 m under the footing. However, in warm season from mid-May to mid-October, the rapid warming of shallow foundation soils near the footing caused by heat transfer through the concrete footing could not be prevented. The maximum thaw around the footing could be as much as 1.0 m deeper than that in the natural ground. Under a warming climate, the maximum thaw around the footing would go deeper than the embedding depth of the footing with four thermosyphons in very warm (>=-0.5 degrees C) permafrost regions and with two thermosyphons in warm (>=-1.0 degrees C) permafrost regions during a 50-year operational period. To retard thaw penetration around the footing, a combined cooling method of thermosyphons and insulation boards is proposed for foundation soils. Numerically simulated results show that the additional placement of the boards On ground surface could prevent the rapid warming of shallow foundation soils and effectively reduce the maximum thaw around the footing. The method could also effectively delay permafrost warming under the footing. Thus, it is recommended to be used at shallow footings in very warm, ice-rich permafrost regions along the QTPTL. (C) 2015 Elsevier B.V. All rights reserved.
收录类别	SCI
WOS关键词	2-PHASE CLOSED THERMOSIPHON ; PERMAFROST REGIONS ; HEAT-TRANSFER ; EMBANKMENT ; HIGHWAY ; PROTECTION ; RAILWAY
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:000367111400023
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557156
专题	寒区旱区环境与工程研究所
通讯作者	Yu, Qihao
作者单位	1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soils Engn, Lanzhou 730000, Peoples R China 2.Gansu Elect Power Design Inst, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Mu, Yanhu,Wang, Guoshang,Yu, Qihao,et al. Thermal performance of a combined cooling method of thermosyphons and insulation boards for tower foundation soils along the Qinghai-Tibet Power Transmission Line[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2016,121:226-236.
APA	Mu, Yanhu,Wang, Guoshang,Yu, Qihao,Li, Guoyu,Ma, Wei,&Zhao, Shuping.(2016).Thermal performance of a combined cooling method of thermosyphons and insulation boards for tower foundation soils along the Qinghai-Tibet Power Transmission Line.COLD REGIONS SCIENCE AND TECHNOLOGY,121,226-236.
MLA	Mu, Yanhu,et al."Thermal performance of a combined cooling method of thermosyphons and insulation boards for tower foundation soils along the Qinghai-Tibet Power Transmission Line".COLD REGIONS SCIENCE AND TECHNOLOGY 121(2016):226-236.

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