Risk assessment of the crushed rock structure embankments of the Qinghai-Tibet Railway under a warming climate

doi:10.1016/j.coldregions.2022.103509

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	Risk assessment of the crushed rock structure embankments of the Qinghai-Tibet Railway under a warming climate
	Zhao, Hongting 2,3; Hou, Yandong 1; Jiang, Guanli 3; Wu, Qingbai 3
刊名	Cold Regions Science and Technology
	2022-04-01
卷号	196
关键词	Climate change Climate models Numerical methods Permafrost Railroads Risk assessment Risk perception Rocks Climate warming Crushed rock Crushed rock revetment Crushed rock-based embankment Crushed-rock embankments Qinghai Tibet plateau Qinghai-Tibet Railway Risks assessments Rock structures U-shaped
ISSN号	0165-232X
DOI	10.1016/j.coldregions.2022.103509
英文摘要	On the Qinghai-Tibet Plateau, transportation infrastructure has been greatly affected by permafrost degradation owing to the increasing air temperature caused by climate change. This study presents a risk assessment model for evaluating the viability of the crushed rock embankment under the scenario of climate warming. The results demonstrate that the service life of an embankment is determined by the time it spends at the lowest or low levels of failure risk. At the failure probability threshold of 0.1, the service lives of open crushed rock-based and U-shaped crushed rock embankments are longer than 100 years, those of closed crushed rock-based embankments are about 66 years, and those of crushed rock revetments are less than 40 years. In essence, the longer an embankment has been in service, the stronger its ability to resist climate warming. Based on these results, U-shaped crushed rock and crushed rock-based embankments are the most capable of offsetting the effects of climate warming on permafrost and should account for a higher proportion of independent embankment structures. The same cannot be said for crushed rock revetments, which should only be used as auxiliary engineering measures. Despite this recommendation, regular maintenance should be conducted on the open system crushed rock embankments because the high winds on the Qinghai-Tibet Plateau fill the embankments with sand, which has a negative effect on the long-term stability of the embankments. © 2022
语种	英语
出版者	Elsevier B.V.
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/157893]
专题	土木工程学院
作者单位	1.Key Laboratory of Disaster Prevention and Mitigation in Civil Engineering of Gansu Province, Lanzhou University of Technology, Lanzhou, China 2.College of Architectural Engineering, Jiaxing Nanhu University, Jiaxing, China; 3.State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, China;
推荐引用方式 GB/T 7714	Zhao, Hongting,Hou, Yandong,Jiang, Guanli,et al. Risk assessment of the crushed rock structure embankments of the Qinghai-Tibet Railway under a warming climate[J]. Cold Regions Science and Technology,2022,196.
APA	Zhao, Hongting,Hou, Yandong,Jiang, Guanli,&Wu, Qingbai.(2022).Risk assessment of the crushed rock structure embankments of the Qinghai-Tibet Railway under a warming climate.Cold Regions Science and Technology,196.
MLA	Zhao, Hongting,et al."Risk assessment of the crushed rock structure embankments of the Qinghai-Tibet Railway under a warming climate".Cold Regions Science and Technology 196(2022).