QQ客服 官方微博 反馈留言

	Thermal Characteristics of the Embankment with Crushed Rock Side Slope to Mitigate Thaw Settlement Hazards of the Qinghai-Tibet Railway
	Li Guoyu1; Mu Yanhu1; Zhang Xia2
刊名	ACTA GEOLOGICA SINICA-ENGLISH EDITION
	2009
卷号	83期号:5页码:1000-1007
关键词	Qinghai-Tibet railway climate change embankment with crushed rock side slope numerical analysis thaw settlement
ISSN号	1000-9515
通讯作者	Li Guoyu(guoyuli@lzb.ac.cn)
英文摘要	Permafrost (perennially frozen ground) appears widely in the Golmud-Lhasa section of the Qinghai-Tibet railway and is characterized by high ground temperature (>= -1 degrees C) and massive ground ice. Under the scenarios of global warming and human activity, the permafrost under the railway will gradually thaw and the massive ground ice will slowly melt, resulting in some thaw settlement hazards, which mainly include longitudinal and lateral cracks, and slope failure. The crushed rock layer has a thermal semiconductor effect under the periodic fluctuation of natural air. It can be used to lower the temperature of the underlying permafrost along the Qinghai-Tibet railway, and mitigate the thaw settlement hazards of the subgrade. In the present paper, the daily and annual changes in the thermal characteristics of the embankment with crushed rock side slope (ECRSS) were quantitatively simulated using the numerical method to study the cooling effect of the crushed rock layer and its mitigative ability. The results showed that the ECRSS absorbed some heat in the daytime in summer, but part of it was released at night, which accounted for approximately 20% of that absorbed. Within a year, it removed more heat from the railway subgrade in winter than that absorbed in summer. It can store approximately 20% of the "cold" energy in subgrade. Therefore, ECRSS is a better measure to mitigate thaw settlement hazards to the railway.
收录类别	SCI
WOS关键词	PERMAFROST ; PLATEAU
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
语种	英语
出版者	WILEY-BLACKWELL
WOS记录号	WOS:000271625000018
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2556183
专题	寒区旱区环境与工程研究所
通讯作者	Li Guoyu
作者单位	1.Chinese Acad Sci, State Key Lab Frozen Soil Engn, CAREERI, Lanzhou 730000, Peoples R China 2.Lanzhou Univ Technol, Sch Energy & Power Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Li Guoyu,Mu Yanhu,Zhang Xia. Thermal Characteristics of the Embankment with Crushed Rock Side Slope to Mitigate Thaw Settlement Hazards of the Qinghai-Tibet Railway[J]. ACTA GEOLOGICA SINICA-ENGLISH EDITION,2009,83(5):1000-1007.
APA	Li Guoyu,Mu Yanhu,&Zhang Xia.(2009).Thermal Characteristics of the Embankment with Crushed Rock Side Slope to Mitigate Thaw Settlement Hazards of the Qinghai-Tibet Railway.ACTA GEOLOGICA SINICA-ENGLISH EDITION,83(5),1000-1007.
MLA	Li Guoyu,et al."Thermal Characteristics of the Embankment with Crushed Rock Side Slope to Mitigate Thaw Settlement Hazards of the Qinghai-Tibet Railway".ACTA GEOLOGICA SINICA-ENGLISH EDITION 83.5(2009):1000-1007.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。