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DOI	10.1016/j.enggeo.2008.04.001
	Assessment of frozen-ground conditions for engineering geology along the Qinghai-Tibet highway and railway, China
	Jin, Huijun; Wei, Zhi; Wang, Shaoling; Yu, Qihao; Lue, Lanzhi; Wu, Qingbai; Ji, Yanjun
发表日期	2008
ISSN	0013-7952
起始页码	96
结束页码	109
卷号	101 期号:3-4
英文摘要	The Qinghai-Tibet Highway and Railway (the Corridor) across the Qinghai-Tibet Plateau traverses 670 km of permafrost and seasonally frozen-ground in the interior of the Plateau, which is sensitive to climatic and anthropogenic environmental changes. The frozen-ground conditions for engineering geology along the Corridor is complicated by the variability in the near-surface lithology, and the mosaic presence of warm permafrost and talik in a periglacial environment. Differential settlement is the major frost-effect problem encountered over permafrost areas. The traditional classification of frozen ground based on the area[ distribution of permafrost is too generalized for engineering purposes and a more refined classification is necessary for engineering design and construction. A proposed classification of 51 zones, sub-zones, and sections of frozen ground has been widely adopted for the design and construction of foundations in the portion of the Corridor studied. The mean annual ground temperature (MAGT), near-surface soil types and moisture content, and active faults and topography are most commonly the primary controlling factors in this classification. However, other factors, such as local microreliefs, drainage conditions, and snow and vegetation covers also exert important influences on the features of frozen ground. About 60% of the total length of the Corridor studied possesses reasonably good frozen-ground conditions, which do not need special mitigative measures for frost hazards. However, other sections, such as Warm and ice-rich or -saturated permafrost, particularly in the sections in wetlands, ground improvement measures such as elevated land bridges and passive or proactive cooling techniques need to be applied to ensure the long-term stability of thermally unstable, thick permafrost subsoils, and/or refill with non-frost-susceptible soils. Due to the long-history of the construction and management of the Corridor by various government departments, adverse impacts of construction and operation on the permafrost environment have been resulted. It is recommended that an integrated, executable plan for the routing of major construction projects within this transportation corridor be established and long-term monitoring networks installed for evaluating and mitigating the impact from anthropogenic and climatic changes in frozen-ground conditions. (C) 2008 Elsevier B.V. All rights reserved.
英文关键词	Assessment; Engineering geology; Ice content; MAGT; Permafrost; Qinghai-Tibet Corridor
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS关键词	GOLMUD-LHASA RAILWAY ; PERMAFROST REGIONS ; PLATEAU ; CONSTRUCTION ; DEGRADATION ; IMPACTS
WOS记录号	WOS:000260955800003
来源期刊	ENGINEERING GEOLOGY
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/240189
作者单位	[Jin, Huijun; Wei, Zhi; Wang, Shaoling; Yu, Qihao; Lue, Lanzhi; Wu, Qingbai; Ji, Yanjun] State Key Lab Frozen Soils Engn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Jin, Huijun,Wei, Zhi,Wang, Shaoling,et al. Assessment of frozen-ground conditions for engineering geology along the Qinghai-Tibet highway and railway, China[J]. 中国科学院西北生态环境资源研究院,2008,101(3-4).
APA	Jin, Huijun.,Wei, Zhi.,Wang, Shaoling.,Yu, Qihao.,Lue, Lanzhi.,...&Ji, Yanjun.(2008).Assessment of frozen-ground conditions for engineering geology along the Qinghai-Tibet highway and railway, China.ENGINEERING GEOLOGY,101(3-4).
MLA	Jin, Huijun,et al."Assessment of frozen-ground conditions for engineering geology along the Qinghai-Tibet highway and railway, China".ENGINEERING GEOLOGY 101.3-4(2008).