气候变化领域集成服务门户(CCPortal): Thermal stability analysis of crushed-rock embankments on a slope in permafrost regions

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DOI	10.1016/j.coldregions.2014.07.005
	Thermal stability analysis of crushed-rock embankments on a slope in permafrost regions
	Pei, Wansheng; Zhang, Mingyi; Lai, Yuanming; Jin, Long; Harbor, Jon
发表日期	2014
ISSN	0165-232X
EISSN	1872-7441
起始页码	175
结束页码	182
卷号	106
英文摘要	Highways/railways often pass across slope areas and their embankments are often built on the slopes in permafrost regions. It is difficult to ensure the thermal stability of the embankments at the slopes due to the effect of slopes. To protect the underlying permafrost, the crushed-rock embankments are often used in the slope areas. Therefore, it is very necessary to explore the thermal state of crushed-rock embankments located on the slopes. In this study, we studied numerically the temperature characteristics of three kinds of crushed-rock embankments located on a slope under global warming, i.e. crushed-rock interlay embankment, crushed-rock interlayer-revetment embankment and crushed-rock base embankment. Numerical results indicate that the crushed-rock interlayer embankment and the crushed-rock interlayer-revetment embankment, located on a slope with a ratio of 1:3.73 (about 15 degrees from the horizontal), cannot effectively eliminate the negative effect of climate warming and construction-induced warming, and the effect of slope is still obvious on the thermal stability of permafrost under the crushed-rock interlayer embankment. However, the crushed-rock base embankment can significantly reduce the temperature of underlying permafrost and keep the underlying permafrost table stable for a long term; furthermore, the ground temperatures under the long side slope are far lower than those under the short side slope, and this will be more advantageous to control the slide of the embankment located on a slope and increase its stability. We also find that the three kinds of embankments cannot all remove the thermal effects of construction from themselves in a short term. Generally speaking, the crushed-rock base embankment structure can be very advantageous to the thermal stability of the embankment on a slope. (C) 2014 Elsevier B.V. All rights reserved.
英文关键词	Thermal stability; Crushed-rock embankment; Effect of slope; Permafrost region
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	QINGHAI-TIBETAN RAILWAY ; REVETMENT ; LAYER
WOS记录号	WOS:000342879400018
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239502
作者单位	[Pei, Wansheng; Zhang, Mingyi; Lai, Yuanming] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Jin, Long] CCCC First Highway Consultants Co Ltd, Key Lab Highway Construct & Maintenance Technol P, Minist Transport, Xian 710065, Peoples R China; [Harbor, Jon] Purdue Univ, Dept Earth Atmospher & Planetary Sci, W Lafayette, IN 47907 USA
推荐引用方式 GB/T 7714	Pei, Wansheng,Zhang, Mingyi,Lai, Yuanming,et al. Thermal stability analysis of crushed-rock embankments on a slope in permafrost regions[J],2014,106.
APA	Pei, Wansheng,Zhang, Mingyi,Lai, Yuanming,Jin, Long,&Harbor, Jon.(2014).Thermal stability analysis of crushed-rock embankments on a slope in permafrost regions.COLD REGIONS SCIENCE AND TECHNOLOGY,106.
MLA	Pei, Wansheng,et al."Thermal stability analysis of crushed-rock embankments on a slope in permafrost regions".COLD REGIONS SCIENCE AND TECHNOLOGY 106(2014).