气候变化领域集成服务门户(CCPortal): The Thermal and Settlement Characteristics of Crushed-Rock Structure Embankments of the Qinghai-Tibet Railway in Permafrost Regions Under Climate Warming

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DOI	10.3389/feart.2021.795894
	The Thermal and Settlement Characteristics of Crushed-Rock Structure Embankments of the Qinghai-Tibet Railway in Permafrost Regions Under Climate Warming
	Mei, Qihang; Yang, Bin; Chen, Ji; Zhao, Jingyi; Hou, Xin; Liu, Youqian; Wang, Jinchang; Zhang, Shouhong; Dang, Haiming
通讯作者	Chen, J (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Beiluhe Observat & Res Stn Frozen Soil Engn & Env, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China. ; Chen, J (通讯作者)，Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China.
发表日期	2021
EISSN	2296-6463
卷号	9
英文摘要	The temperature difference at the top and bottom of the crushed-rock layer can drive the heat convection inside. Based on this mechanism, crushed-rock structures with different forms are widely used in the construction and maintenance of the Qinghai-Tibet Railway as cooling measures in permafrost regions. To explore the stability of different forms of crushed-rock structure embankments under climate warming, the temperature and deformation data of a U-shaped crushed-rock embankment (UCRE) and a crushed-rock revetment embankment (CRRE) are analysed. The variations in temperature indicate that permafrost beneath the natural sites and embankments is degrading but at different rates. The thermal regime of ground under the natural site is only affected by climate warming, while that under embankment is also affected by embankment construction and the cooling effect of the crushed-rock structure. These factors make shallow permafrost degradation beneath the embankments slower than that beneath the natural sites and deep permafrost degradation faster than that beneath the natural sites. Moreover, the convection occurring in the crushed-rock base layer during the cold season makes the degradation of permafrost beneath the UCRE slower than that in the CRRE. The faster degradation of permafrost causes the accumulated deformation of the CRRE to be far greater than that of the UCRE, which may exceed the allowable value of the design code. The analysis shows that the stability of the UCRE meets the engineering requirements and the CRRE needs to be strengthened in warm and ice-rich permafrost regions under climate warming.
关键词	THAW SETTLEMENT ACTIVE-LAYER DEFORMATION STABILITY PLATEAU HIGHWAY THERMOSIPHONS TEMPERATURE REVETMENT
英文关键词	permafrost; crushed-rock structure embankment; stability; thermal regime; settlement
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000760980300001
来源期刊	FRONTIERS IN EARTH SCIENCE
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/254727
作者单位	[Mei, Qihang; Chen, Ji; Zhao, Jingyi; Hou, Xin] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Beiluhe Observat & Res Stn Frozen Soil Engn & Env, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China; [Mei, Qihang; Chen, Ji; Zhao, Jingyi; Hou, Xin] Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China; [Yang, Bin] China Geol Survey, Command Ctr Comprehens Nat Resources Survey, Beijing, Peoples R China; [Liu, Youqian; Wang, Jinchang; Zhang, Shouhong; Dang, Haiming] China Railway Qinghai Tibet Grp Co Ltd, Xining, Peoples R China
推荐引用方式 GB/T 7714	Mei, Qihang,Yang, Bin,Chen, Ji,et al. The Thermal and Settlement Characteristics of Crushed-Rock Structure Embankments of the Qinghai-Tibet Railway in Permafrost Regions Under Climate Warming[J]. 中国科学院西北生态环境资源研究院,2021,9.
APA	Mei, Qihang.,Yang, Bin.,Chen, Ji.,Zhao, Jingyi.,Hou, Xin.,...&Dang, Haiming.(2021).The Thermal and Settlement Characteristics of Crushed-Rock Structure Embankments of the Qinghai-Tibet Railway in Permafrost Regions Under Climate Warming.FRONTIERS IN EARTH SCIENCE,9.
MLA	Mei, Qihang,et al."The Thermal and Settlement Characteristics of Crushed-Rock Structure Embankments of the Qinghai-Tibet Railway in Permafrost Regions Under Climate Warming".FRONTIERS IN EARTH SCIENCE 9(2021).