气候变化领域集成服务门户(CCPortal): Managing ice-rich permafrost exposed during cutting excavation along Qinghai-Tibetan railway: Experiences and implementation

CCPortal

DOI	10.1016/j.enggeo.2011.07.012
	Managing ice-rich permafrost exposed during cutting excavation along Qinghai-Tibetan railway: Experiences and implementation
	Wen, Zhi; Zhang, Tingjun; Sheng, Yu; Ma, Wei; Wu, Qingbai; Feng, Wenjie; Sun, Zhizhong
发表日期	2011
ISSN	0013-7952
起始页码	316
结束页码	327
卷号	122 期号:3-4
英文摘要	There is widespread ice-rich permafrost over Qinghai-Tibetan plateau. The exposure and subsequently thawing of ice-rich permafrost result in serious engineering and environmental consequences. However, it is often inevitable to expose ice-rich permafrost during the construction of railway, highway, or any engineering structures in permafrost regions. In this paper, we described the hazards induced from ice-rich permafrost exposure including slope instability, thermal slumping, soil erosion, frost heave and thaw settlement along Qinghai-Tibetan railway. The leading factors resulting in the occurrence of hazards were reviewed. Various remedial measures applied during the construction of Qinghai-Tibetan railway were introduced. The operation effects on avoiding failure or minimizing the damage consequence were discussed. The results show that ice-rich permafrost exposure generally causes cutting failure unless proper countermeasures are applied. Slope instability is the most serious damage for ice-rich permafrost cutting. Frost heaving and thaw settlement tend to damage the surface treatments and have lesser effects on railway operation. Experience shows that Coarse-grain soil replacement with insulation and drainage system are the most common measures to be applied. Cement concrete framework measure is more popular than turf covering and insulation covering due to its construction convenience and less cost. The results indicate that the treatment of turf covering is more suitable for ice-rich permafrost exposure than insulation covering due to high long-term performance rating and surface deformation adaptability. Retaining wall is an effective remedial measure to prevent slope failure of deep cut in permafrost regions. The field investigation shows that design and construction methods to deal with the exposure and thawing of ice-rich permafrost along Qinghai-Tibetan railway are efficient and these experiences are helpful for other projects in cold regions. (C) 2011 Elsevier B.V. All rights reserved.
英文关键词	Cutting; Ice-rich permafrost; Exposure; Slope instability; Qinghai-Tibetan railway
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS关键词	PLATEAU ; HIGHWAY ; REGIONS
WOS记录号	WOS:000296309300017
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/240268
作者单位	[Wen, Zhi; Zhang, Tingjun] Univ Colorado, Natl Snow & Ice Data Ctr, Cooperat Inst Res Environm Sci, Boulder, CO 80309 USA; [Wen, Zhi; Zhang, Tingjun; Sheng, Yu; Ma, Wei; Wu, Qingbai; Feng, Wenjie; Sun, Zhizhong] CAS, State Key Lab Frozen Soil Engn, CAREERI, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Wen, Zhi,Zhang, Tingjun,Sheng, Yu,et al. Managing ice-rich permafrost exposed during cutting excavation along Qinghai-Tibetan railway: Experiences and implementation[J]. 中国科学院西北生态环境资源研究院,2011,122(3-4).
APA	Wen, Zhi.,Zhang, Tingjun.,Sheng, Yu.,Ma, Wei.,Wu, Qingbai.,...&Sun, Zhizhong.(2011).Managing ice-rich permafrost exposed during cutting excavation along Qinghai-Tibetan railway: Experiences and implementation.ENGINEERING GEOLOGY,122(3-4).
MLA	Wen, Zhi,et al."Managing ice-rich permafrost exposed during cutting excavation along Qinghai-Tibetan railway: Experiences and implementation".ENGINEERING GEOLOGY 122.3-4(2011).