气候变化领域集成服务门户(CCPortal): Cooling performance and deformation behavior of crushed-rock embankments on the Qinghai-Tibet Railway in permafrost regions

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DOI	10.1016/j.enggeo.2019.105453
	Cooling performance and deformation behavior of crushed-rock embankments on the Qinghai-Tibet Railway in permafrost regions
	Tai, Bowen; Wu, Qingbai; Zhang, Zhongqiong; Xu, Xiaoming
发表日期	2020
ISSN	0013-7952
EISSN	1872-6917
卷号	265
英文摘要	The structural functionality of roads and railways in warm permafrost regions is influenced by both physical and mechanical processes at work within the underlying subgrade. This paper uses ten-years worth of monitoring data to examine the thermal regimes and deformation behaviors of three different types of crushed-rock embankments employed in the construction of the Qinghai-Tibet Railway, which is located in a warm permafrost region of the Tibetan Plateau, China. More specifically, the efficiency of U-shaped crushed-rock, crushed-rock revetment, and crushed-rock basement embankments in stabilizing permafrost temperature is evaluated with consideration to the permafrost table, ground temperature, and mean annual ground temperature. Then, deformation laws in the three embankments were analyzed. Finally, deformation characteristics and sources for general subgrade are discussed and summarized on the basis of monitoring data and previous research. Results show the permafrost table of each of the three crushed-rock embankments to be higher than that of the natural ground at all times, and that the underlying permafrost warms with time regardless of the type of embankment employed. The deformation characteristics of general subgrade in permafrost regions are determined to be non-uniform and persistent. Furthermore, U-shaped crushed-rock embankment out-performed both crushed-rock revetment embankment and crushed-rock basement embankment in terms of cooling capacity and ability to weaken the sunny-shady slope effect. These findings stand to provide important guidance for understanding the deformation mechanisms of subgrade in warm permafrost regions, as well as for improving Qinghai-Tibet Railway embankment quality and operational safety.
英文关键词	Crushed-rock embankment; Cooling performance; Deformation behavior; Qinghai-Tibet Railway; Permafrost region
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS关键词	ROAD EMBANKMENT ; FROST HEAVE ; TEMPERATURE ; LAYER ; SOILS ; WARM ; DEGRADATION ; SETTLEMENT ; MECHANISM
WOS记录号	WOS:000517660100027
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/240190
作者单位	[Tai, Bowen; Wu, Qingbai; Zhang, Zhongqiong; Xu, Xiaoming] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Tai, Bowen,Wu, Qingbai,Zhang, Zhongqiong,et al. Cooling performance and deformation behavior of crushed-rock embankments on the Qinghai-Tibet Railway in permafrost regions[J]. 中国科学院西北生态环境资源研究院,2020,265.
APA	Tai, Bowen,Wu, Qingbai,Zhang, Zhongqiong,&Xu, Xiaoming.(2020).Cooling performance and deformation behavior of crushed-rock embankments on the Qinghai-Tibet Railway in permafrost regions.ENGINEERING GEOLOGY,265.
MLA	Tai, Bowen,et al."Cooling performance and deformation behavior of crushed-rock embankments on the Qinghai-Tibet Railway in permafrost regions".ENGINEERING GEOLOGY 265(2020).