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	Innovative designs of permafrost roadbed for the Qinghai-Tibet Railway
	Cheng GuoDong; Wu QingBai; Ma Wei
刊名	SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES
	2009-02-01
卷号	52期号:2页码:530-538
关键词	warm permafrost global warming Qinghai-Tibet Railway cooled roadbed
ISSN号	1006-9321
DOI	10.1007/s11431-008-0291-6
通讯作者	Cheng GuoDong(gdcheng@lzb.ac.cn)
英文摘要	Under global warming scenarios, the passive method of simply increasing the thermal resistance by raising the embankment height and using insulating materials has been proven ineffective in warm and ice-rich permafrost areas and therefore could not be used in the Qinghai-Tibet Railway engineering. Instead, a proactive "cooled-roadbed" approach was developed and used to lower the ground temperature in order to maintain a perennially frozen subgrade. The concept that local and site-specific factors play an important role in the occurrence and disappearance of permafrost has helped us to devise a number of measures to cool down the roadbed. For example, we adjust and control heat transfer by using different embankment configurations and fill materials. The Qinghai-Tibet Railway project demonstrates that a series of proactive roadbed-cooling methods can be used to lower the temperature of permafrost beneath the embankment and to stabilize the roadbed. These methods include solar radiation control using shading boards, heat convection control using ventilation ducts, thermosyphons, air-cooled embankments, and heat conduction control using "thermal semi-conductor" materials, as well as combinations of above mentioned three control measures. This roadbed-cooling approach provides not only a solution for engineering construction in sensitive permafrost areas but also a countermeasure against possible global warming.
收录类别	SCI
WOS关键词	CONSTRUCTION ; EMBANKMENT ; PLATEAU ; REGIONS ; PROTECTION ; INSULATION ; CHINA
WOS研究方向	Engineering ; Materials Science
WOS类目	Engineering, Multidisciplinary ; Materials Science, Multidisciplinary
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000263116700034
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2556197
专题	寒区旱区环境与工程研究所
通讯作者	Cheng GuoDong
作者单位	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	Cheng GuoDong,Wu QingBai,Ma Wei. Innovative designs of permafrost roadbed for the Qinghai-Tibet Railway[J]. SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES,2009,52(2):530-538.
APA	Cheng GuoDong,Wu QingBai,&Ma Wei.(2009).Innovative designs of permafrost roadbed for the Qinghai-Tibet Railway.SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES,52(2),530-538.
MLA	Cheng GuoDong,et al."Innovative designs of permafrost roadbed for the Qinghai-Tibet Railway".SCIENCE IN CHINA SERIES E-TECHNOLOGICAL SCIENCES 52.2(2009):530-538.

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