气候变化领域集成服务门户(CCPortal): Three-Dimensional Nonlinear Analysis for the Cooling Characteristics of Crushed-Rock Interlayer Embankment with Ventilated Duct along the Qinghai-Tibet Expressway in Permafrost Regions

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DOI	10.1061/(ASCE)CR.1943-5495.0000018
	Three-Dimensional Nonlinear Analysis for the Cooling Characteristics of Crushed-Rock Interlayer Embankment with Ventilated Duct along the Qinghai-Tibet Expressway in Permafrost Regions
	Zhang, Mingyi; Lai, Yuanming; Dong, Yuanhong
发表日期	2010
ISSN	0887-381X
起始页码	126
结束页码	141
卷号	24 期号:4
英文摘要	The crushed-rock embankment and duct-ventilated embankment have been used as effective cooling measures to protect permafrost underlying the Qinghai-Tibet Railway from thawing in China. These two cooling techniques are not directly applied to the Qinghai-Tibet Expressway, however, due to the large width and higher temperature of pavement surface. Therefore, considering the heat transfer characteristics of crushed-rock interlayer embankments and duct-ventilated embankments, we designed the crushed-rock interlayer embankment with ventilated duct. For cold regions engineering projects, the thermal regime is the most important factor that determines the stability of construction. To investigate the thermal stability of this new type of embankment, a three-dimensional numerical model was developed based on heat and mass transfer theory. The model includes coupled heat transfer between the airflow and the duct wall, air convective heat transfer within the crushed-rock interlayer, and heat conduction with phase change in the soil layer. The computational results indicated that the numerical model can reasonably solve the coupled heat and mass transfer for the crushed-rock interlayer embankment with ventilated duct. Based on an assumption that the mean annual air temperature will increase by 2.6 degrees C in the next 50 years, it was determined that in areas where the mean annual air temperature is currently -4.0 degrees C, the crushed-rock interlayer embankment with ventilated duct can be an effective measure to decrease the underlying ground temperature and ensure the stability of the Qinghai-Tibet Expressway in permafrost regions.
英文关键词	Cooling characteristic; Ventilated duct; Qinghai-Tibet Expressway; Crushed-rock interlayer embankment; Permafrost
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	RAILWAY EMBANKMENT ; PLATEAU
WOS记录号	WOS:000284273900003
来源期刊	JOURNAL OF COLD REGIONS ENGINEERING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239520
作者单位	[Zhang, Mingyi; Lai, Yuanming; Dong, Yuanhong] Chinese Acad Sci, State Key Lab Frozen Soil Engn Cold & Arid Reg, Environm & Engn Res Inst, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Mingyi,Lai, Yuanming,Dong, Yuanhong. Three-Dimensional Nonlinear Analysis for the Cooling Characteristics of Crushed-Rock Interlayer Embankment with Ventilated Duct along the Qinghai-Tibet Expressway in Permafrost Regions[J],2010,24(4).
APA	Zhang, Mingyi,Lai, Yuanming,&Dong, Yuanhong.(2010).Three-Dimensional Nonlinear Analysis for the Cooling Characteristics of Crushed-Rock Interlayer Embankment with Ventilated Duct along the Qinghai-Tibet Expressway in Permafrost Regions.JOURNAL OF COLD REGIONS ENGINEERING,24(4).
MLA	Zhang, Mingyi,et al."Three-Dimensional Nonlinear Analysis for the Cooling Characteristics of Crushed-Rock Interlayer Embankment with Ventilated Duct along the Qinghai-Tibet Expressway in Permafrost Regions".JOURNAL OF COLD REGIONS ENGINEERING 24.4(2010).