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DOI	10.1016/j.coldregions.2021.103300
	Formation and evolution of suprapermafrost taliks beneath earth-filled embankments along the Qinghai-Tibet Railway in permafrost regions
	Wang, Honglei; Sun, Zhizhong; Zhang, Jianming; Liu, Yongzhi; Li, Guoyu
通讯作者	Sun, ZZ (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	0165-232X
EISSN	1872-7441
卷号	188
英文摘要	Taliks are bodies or layers of unfrozen ground in permafrost areas. Suprapermafrost taliks (SPTs) formed between the active layer and permafrost table beneath embankments along the Qinghai-Tibet Railway (QTR) would reduce the stability of the embankments and thus threaten the safety of QTR operations, because the SPTs exhibit a lower bearing capacity than that of frozen ground. This study investigated the formation and evolution of SPTs beneath earth-filled embankments at two monitoring sites (P7 and P17) along the QTR in order to determine the SPTs formation mechanism. The SPTs under the left shoulder of the embankments at P7 and P17 were caused by thermal disturbance of filling and vertical heat accumulation, respectively. The mechanism of SPTs formation beneath the embankments was closely associated with the mean annual ground temperature and the height of embankment filling materials. The study findings can facilitate understanding the formation and evolution of SPTs beneath the embankments in similar sections along the QTR. In particular, the findings can serve as a guidance for the QTR administration bureau in implementing countermeasures for eliminating these unfrozen layers and increasing ground bearing capacity.
关键词	ACTIVE LAYER THERMAL REGIME HIGHWAY FAILURE IMPACT STATE LAKES THAW
英文关键词	Suprapermafrost taliks; Thermal disturbance; Heat accumulation; Qinghai-Tibet Railway; Permafrost regions
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS记录号	WOS:000660572100001
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
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/253623
作者单位	[Wang, Honglei; Sun, Zhizhong; Zhang, Jianming; Liu, Yongzhi; Li, Guoyu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Wang, Honglei] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Li, Guoyu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Da Xinganling Observat & Res Stn Frozen Ground En, Jiagedaqi 165000, Heilongjiang, Peoples R China
推荐引用方式 GB/T 7714	Wang, Honglei,Sun, Zhizhong,Zhang, Jianming,et al. Formation and evolution of suprapermafrost taliks beneath earth-filled embankments along the Qinghai-Tibet Railway in permafrost regions[J]. 中国科学院西北生态环境资源研究院,2021,188.
APA	Wang, Honglei,Sun, Zhizhong,Zhang, Jianming,Liu, Yongzhi,&Li, Guoyu.(2021).Formation and evolution of suprapermafrost taliks beneath earth-filled embankments along the Qinghai-Tibet Railway in permafrost regions.COLD REGIONS SCIENCE AND TECHNOLOGY,188.
MLA	Wang, Honglei,et al."Formation and evolution of suprapermafrost taliks beneath earth-filled embankments along the Qinghai-Tibet Railway in permafrost regions".COLD REGIONS SCIENCE AND TECHNOLOGY 188(2021).