气候变化领域集成服务门户(CCPortal): Cooling performance enhancement of a new expressway embankment in the Tibetan Plateau permafrost zone

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DOI	10.1016/j.coldregions.2021.103345
	Cooling performance enhancement of a new expressway embankment in the Tibetan Plateau permafrost zone
	Liu, Minghao; Zheng, Hao; Niu, Fujun; Fang, Jianhong; Lin, Zhanju; Luo, Jing; Yin, Guoan
通讯作者	Liu, MH ; Niu, FJ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China.
发表日期	2021
ISSN	0165-232X
EISSN	1872-7441
卷号	190
英文摘要	The crushed-rock interlayer (CRI), as typical cooling technique used in the Qinghai-Tibet Railway, cannot be directly applied in expressways traversing permafrost areas because of the intense heat-absorption asphalt pavement. Sufficient cooling of permafrost foundation to meet the demand of engineering stability is an important issue. In this study, a CRI embankment combined with vertical ventilation ducts (VVDs) was designed to strengthen the convective cooling of wide expressways. To assess the performance of the combination design, a field experiment was conducted in the Tibet Plateau by building a full-scale expressway section. A numerical model was then developed and validated to analyze the heat transfer process and to predict its long-term thermal regimes considering climate warming. Results show that the new structure can produce an obviously increased convection cooling on permafrost foundation by enhancing the winter cold-energy utilization. The VVDs at the centerline play an effective role in dissipating heat accumulation in embankment center and can eliminate thermal asymmetry caused by plateau's prevalent wind direction. The combination of CRI and VVDs is effective to control ground temperature to improve expressway embankment stability. This new design could be considered for application in expressways built on permafrost stratum.
关键词	RAILWAY EMBANKMENTS ROCK EMBANKMENT REGIONS
英文关键词	Cooling performance; Crushed-rock interlayer; Ventilation ducts; Expressway embankment; Permafrost zone
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS记录号	WOS:000684977200001
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/254471
作者单位	[Liu, Minghao; Niu, Fujun; Lin, Zhanju; Luo, Jing; Yin, Guoan] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Zheng, Hao] Hokkaido Univ, Fac Engn, Kita Ku, Kita 13,Nishi 8, Sapporo, Hokkaido 0608628, Japan; [Fang, Jianhong] Minist Transport, Key Lab Highway Construct & Maintenance Technol P, Qinghai Res & Observat Base, Xining 810016, Qinghai, Peoples R China
推荐引用方式 GB/T 7714	Liu, Minghao,Zheng, Hao,Niu, Fujun,et al. Cooling performance enhancement of a new expressway embankment in the Tibetan Plateau permafrost zone[J]. 中国科学院西北生态环境资源研究院,2021,190.
APA	Liu, Minghao.,Zheng, Hao.,Niu, Fujun.,Fang, Jianhong.,Lin, Zhanju.,...&Yin, Guoan.(2021).Cooling performance enhancement of a new expressway embankment in the Tibetan Plateau permafrost zone.COLD REGIONS SCIENCE AND TECHNOLOGY,190.
MLA	Liu, Minghao,et al."Cooling performance enhancement of a new expressway embankment in the Tibetan Plateau permafrost zone".COLD REGIONS SCIENCE AND TECHNOLOGY 190(2021).