气候变化领域集成服务门户(CCPortal): Thermal and deformational repairing effect of crushed rock revetment acting as reinforcement along Qinghai-Tibet railway in permafrost regions

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DOI	10.1016/j.accre.2022.03.001
	Thermal and deformational repairing effect of crushed rock revetment acting as reinforcement along Qinghai-Tibet railway in permafrost regions
	Hou, Yan-Dong; Wu, Qing-Bai; Zhang, Ming-Li; Zhou, Feng-Xi
发表日期	2022
ISSN	1674-9278
起始页码	421
结束页码	431
卷号	13 期号:3 页码:11
英文摘要	Due to the particularity and complexity of permafrost subgrade, research on its long-term maintenance and reinforcement under climate warming and engineering activities is of great significance. To mitigate subgrade diseases caused by thermal disturbance during the engineering construction and operation in the initial stage, the crushed-rock revetment (CRR) was additionally paved with a thickness of 1.5 m and 1.0 m on some sunny and shady shoulders of the traditional embankments along the Qinghai-Tibet railway, respectively. The improving effects for thermal and deforming stability are evaluated based on observation data of ground temperatures and embankment deformations at two sites from 2002 to 2014. The results show that a larger uplifting magnitude in the artificial permafrost table (APT), greater ground temperature decreasing amplitudes and reduction ranges of settling rate appear under the shady embankment shoulder in warm permafrost region, and both sides in the cold permafrost region when reinforcing with CRR. However, in warm permafrost region, the laying of CRR on the sunny slope of subgrade may cause considerable thermal disturbance to the underlying permafrost foundation, combined with the resulting additional stress, induce the further expansion of differential settlement. Moreover, the thermal stability strengthening effect of the CRR is closely related to the variation of the APT thickness in the earlier stage, convection intensity inside the CRR, 'cold energy reserve' in the deeper permafrost, and amount of solar radiation received by the CRR. More effective reinforcements should be implemented to alleviate the potential threaten beneath sunny embankment slope in warm permafrost regions.
英文关键词	Ice-rich permafrost; Crushed-rock revetment; Differential settlement; Thermal stability; Artificial permafrost table
学科领域	Environmental Sciences; Meteorology & Atmospheric Sciences
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
WOS记录号	WOS:000802076800002
来源期刊	ADVANCES IN CLIMATE CHANGE RESEARCH
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/273967
作者单位	Lanzhou University of Technology; Chinese Academy of Sciences; Chinese Academy of Sciences
推荐引用方式 GB/T 7714	Hou, Yan-Dong,Wu, Qing-Bai,Zhang, Ming-Li,et al. Thermal and deformational repairing effect of crushed rock revetment acting as reinforcement along Qinghai-Tibet railway in permafrost regions[J],2022,13(3):11.
APA	Hou, Yan-Dong,Wu, Qing-Bai,Zhang, Ming-Li,&Zhou, Feng-Xi.(2022).Thermal and deformational repairing effect of crushed rock revetment acting as reinforcement along Qinghai-Tibet railway in permafrost regions.ADVANCES IN CLIMATE CHANGE RESEARCH,13(3),11.
MLA	Hou, Yan-Dong,et al."Thermal and deformational repairing effect of crushed rock revetment acting as reinforcement along Qinghai-Tibet railway in permafrost regions".ADVANCES IN CLIMATE CHANGE RESEARCH 13.3(2022):11.