Development of thermal and deformation stability of Qinghai-Tibet Highway under sunny-shady slope effect in southern Tanglha region in recent decade

doi:10.1016/j.sandf.2020.01.012

IEECAS OpenIR > 生态环境研究室

	Development of thermal and deformation stability of Qinghai-Tibet Highway under sunny-shady slope effect in southern Tanglha region in recent decade
	Song, Yi 1,3; Jin, Long 2,3; Peng, Hui 2; Liu, Hongyuan 3
通讯作者	Jin, Long(jlcoolmail@163.com)
	2020-04-01
发表期刊	SOILS AND FOUNDATIONS
ISSN	0038-0806
卷号	60 期号:2 页码:342-355
摘要	The Qinghai-Tibet Highway (QTH) crosses 528 km of a permafrost region in the Qinghai-Tibet Plateau, half of which has suffered freezing-thawing damage induced by the sunny-shady slope effect (SSSE), especially in the Southern Tanglha Region (STR). Given this problem, a continual field investigation was carried out in the STR to examine the types of damage and the development characteristics of the affected embankments. The investigation indicated that up to 60% of the damage featured an asymmetric specialty, mainly comprising uneven thaw deformation and longitudinal cracks. Furthermore, the long-term monitoring data taken from four observation sites in a recent decade, including the shallow soil temperature, ground temperature, freezing-thawing processes, and deformation, were used to analyze the thermal-deformation process of the embankments as well. Under the SSSE, the temperature fields of the embankments were characterized by the increase in ground temperature, the descent of the permafrost table, and the expansion of the thawing period in the sunny slopes during the operation period, representing several remarkable asymmetric phenomena. Specifically, the maximum difference between the annual average shallow soil temperatures of the sunny and shady slopes reached 3.17 degrees C. In addition, the permafrost table on the sunny slope side was about 1.0 m lower than that on the shady slope side because the thawing period is 1-2 months longer each year on the sunny slope side. Correspondingly, the asymmetric thermal state of the embankments led to varying degrees of asymmetric deformations. The heat budget calculation showed that the route direction was the most significant factor of influence on the SSSE. The embankment height was also seen to have a remarkable influence on the SSSE. (C) 2020 Production and hosting by Elsevier B.V. on behalf of The Japanese Geotechnical Society.
关键词	Qinghai-Tibet Highway Permafrost Embankment stability Sunny-shady slope effect
DOI	10.1016/j.sandf.2020.01.012
关键词[WOS]	CLOSED THERMOSIPHON EMBANKMENT ; PERMAFROST REGIONS ; BOUNDARY-CONDITIONS ; ACTIVE-LAYER ; RAILWAY ; DEGRADATION ; SUBGRADE ; PLATEAU
收录类别	SCI ; SCI
语种	英语
资助项目	National Natural Science Foundation of China[41971095] ; Project of Youth Science and Technology New Star in Shaanxi Province of China[2016KJXX-91] ; Project of Youth Science and Technology New Star in Shaanxi Province of China[2019KJXX-93] ; Special Support Plan for High Level Talents in Shaanxi Province of China
WOS研究方向	Engineering ; Geology
项目资助者	National Natural Science Foundation of China ; Project of Youth Science and Technology New Star in Shaanxi Province of China ; Special Support Plan for High Level Talents in Shaanxi Province of China
WOS类目	Engineering, Geological ; Geosciences, Multidisciplinary
WOS记录号	WOS:000543370000003
出版者	JAPANESE GEOTECHNICAL SOC
引用统计	被引频次：16[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/14980
专题	生态环境研究室
通讯作者	Jin, Long
作者单位	1.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710075, Peoples R China 2.CCCC First Highway Consultants Co LTD, State Key Lab Rd Engn Safety & Hlth High Altitude, Xian 710075, Peoples R China 3.Univ Tasmania, Coll Sci & Engn, Hobart, Tas 7005, Australia
推荐引用方式 GB/T 7714	Song, Yi,Jin, Long,Peng, Hui,et al. Development of thermal and deformation stability of Qinghai-Tibet Highway under sunny-shady slope effect in southern Tanglha region in recent decade[J]. SOILS AND FOUNDATIONS,2020,60(2):342-355.
APA	Song, Yi,Jin, Long,Peng, Hui,&Liu, Hongyuan.(2020).Development of thermal and deformation stability of Qinghai-Tibet Highway under sunny-shady slope effect in southern Tanglha region in recent decade.SOILS AND FOUNDATIONS,60(2),342-355.
MLA	Song, Yi,et al."Development of thermal and deformation stability of Qinghai-Tibet Highway under sunny-shady slope effect in southern Tanglha region in recent decade".SOILS AND FOUNDATIONS 60.2(2020):342-355.