气候变化领域集成服务门户(CCPortal): Asymmetric talik formation beneath the embankment of Qinghai-Tibet Highway triggered by the sunny-shady effect

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DOI	10.1016/j.energy.2022.126472
	Asymmetric talik formation beneath the embankment of Qinghai-Tibet Highway triggered by the sunny-shady effect
	Chen, Lin; Yu, Wenbing; Zhang, Tianqi; Yi, Xin
发表日期	2023
ISSN	0360-5442
EISSN	1873-6785
卷号	266
英文摘要	Energy budget beneath the road embankment strongly impacts the permafrost thermal state and stability of the overlying infrastructure. However, magnitudes and rates of daily heat flux caused by the sunny-shady effect are poorly understood. Herein, we investigated the sunny-shady effect on heat flux characteristics of road embankments through long-term observations and numerical simulation. Simulated and observed soil temperatures at depth were in good agreement over the 2007-2012 period. Simulated results show that maximum differences in the annual heat budget were 19.8 MJ/m(2), 61.3 MJ/m(2), and 103.2 MJ/m(2) for the cases with the mean annual near-surface Delta T of 1 degrees C, 3 degrees C, and 5 degrees C, respectively, in comparison to the reference case without the sunny and shady effect. These processes triggered the talik initiation and development on the sunny side and enlarged laterally and vertically. Talik area for the Delta T of 5 degrees C was more than 5 times larger than that of 1 degrees C. Finally, the sunny and shady effect can cause asymmetric road damage, such as uneven settlement and longitudinal cracking. The net finding is potentially helpful for better understanding differential embankment deformation, as well as for improving the design of the engineered mitigation measures.
关键词	Energy budget Sunny-shady effect Qinghai-Tibet highway Road damage Permafrost Talik
英文关键词	GLOBAL SOLAR-RADIATION; PERMAFROST REGIONS; THERMAL REGIME; RAILWAY; SLOPES; TEMPERATURE; PLATEAU; SETTLEMENT; INTERLAYER; SUBGRADE
WOS研究方向	Thermodynamics ; Energy & Fuels
WOS记录号	WOS:001127077700001
来源期刊	ENERGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283072
作者单位	Chinese Academy of Sciences; University of California System; University of California Riverside; Chongqing Jiaotong University; Chongqing Jiaotong University; East China University of Technology
推荐引用方式 GB/T 7714	Chen, Lin,Yu, Wenbing,Zhang, Tianqi,et al. Asymmetric talik formation beneath the embankment of Qinghai-Tibet Highway triggered by the sunny-shady effect[J],2023,266.
APA	Chen, Lin,Yu, Wenbing,Zhang, Tianqi,&Yi, Xin.(2023).Asymmetric talik formation beneath the embankment of Qinghai-Tibet Highway triggered by the sunny-shady effect.ENERGY,266.
MLA	Chen, Lin,et al."Asymmetric talik formation beneath the embankment of Qinghai-Tibet Highway triggered by the sunny-shady effect".ENERGY 266(2023).