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DOI	10.1016/j.applthermaleng.2016.09.033
	Optimal design of thermal insulation layer of a tunnel in permafrost regions based on coupled heat-water simulation
	Li, Shuangyang; Niu, Fujun; Lai, Yuanming; Pei, Wansheng; Yu, Wenbing
发表日期	2017
ISSN	1359-4311
起始页码	1264
结束页码	1273
卷号	110
英文摘要	In permafrost regions, if thermal insulation layer is thinner, seasonal freeze-thaw action can induce severe damages on a tunnel structure; otherwise, the construction cost is high and not economical. To find out a scientific balance between the safety and the economy of the tunnel in permafrost regions, an optimal design on the thermal insulation layer should be carried out according to some relevant numerical or analytical calculations. To solve this problem, a coupled heat-water model for the tunnel in cold regions is built on the basis of energy and mass conservation principles. Then a representative permafrost tunnel in the Qinghai-Tibet Plateau (QTP) is used as an example to simulate temperature and water processes of the surrounding permafrost, and thereby a key position and an unfavorable time are picked out for the optimal design. Subsequently, the optimal thickness of the thermal insulation layer for the permafrost tunnel is determined by a series of coupled heat-water simulations. Eventually, the temperature and water states of the surrounding permafrost of the tunnel at the unfavorable time are fully evaluated to make sure that the tunnel is free of freeze-thaw damages. This study is expected to better understand the coupled temperature and water processes in the surrounding permafrost of the tunnel and further design a safe and economical tunnel structure. Of course, it can serve as a reference for further investigation, too. (C) 2016 Elsevier Ltd. All rights reserved.
英文关键词	Permafrost region; Tunnel; Thermal insulation; Optimal design; Coupled heat-water model
语种	英语
WOS研究方向	Thermodynamics ; Energy & Fuels ; Engineering ; Mechanics
WOS类目	Thermodynamics ; Energy & Fuels ; Engineering, Mechanical ; Mechanics
WOS关键词	SURROUNDING ROCK ; NONLINEAR-ANALYSIS ; FORECAST ANALYSIS ; TIBET RAILWAY ; COLD REGIONS ; AIR-FLOW ; FROZEN ; EMBANKMENT ; STABILITY ; DAMAGE
WOS记录号	WOS:000388775600126
来源期刊	APPLIED THERMAL ENGINEERING
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239480
作者单位	[Li, Shuangyang; Niu, Fujun; Lai, Yuanming; Pei, Wansheng; Yu, Wenbing] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Li, Shuangyang,Niu, Fujun,Lai, Yuanming,et al. Optimal design of thermal insulation layer of a tunnel in permafrost regions based on coupled heat-water simulation[J],2017,110.
APA	Li, Shuangyang,Niu, Fujun,Lai, Yuanming,Pei, Wansheng,&Yu, Wenbing.(2017).Optimal design of thermal insulation layer of a tunnel in permafrost regions based on coupled heat-water simulation.APPLIED THERMAL ENGINEERING,110.
MLA	Li, Shuangyang,et al."Optimal design of thermal insulation layer of a tunnel in permafrost regions based on coupled heat-water simulation".APPLIED THERMAL ENGINEERING 110(2017).