Thermal and deformational repairing effect of crushed rock revetment acting as reinforcement along Qinghai-Tibet railway in permafrost regions

doi:10.1016/j.accre.2022.03.001

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Thermal and deformational repairing effect of crushed rock revetment acting as reinforcement along Qinghai-Tibet railway in permafrost regions
	Hou, Yan-Dong 2; Wu, Qing-Bai 1,3; Zhang, Ming-Li 2; Zhou, Feng-Xi 2
刊名	ADVANCES IN CLIMATE CHANGE RESEARCH
	2022-06-01
卷号	13 期号:3 页码:421-431
关键词	Ice-rich permafrost Crushed-rock revetment Differential settlement Thermal stability Artificial permafrost table
ISSN号	1674-9278
DOI	10.1016/j.accre.2022.03.001
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.
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	KEAI PUBLISHING LTD
WOS记录号	WOS:000802076800002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158666]
专题	土木工程学院
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Engn, Lanzhou 730000, Peoples R China; 2.Lanzhou Univ Technol, Sch Civil Engn, Lanzhou 730050, Peoples R China; 3.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Beiluhe Observat Stn Frozen Soil Environm & Engn, Lanzhou 730000, Peoples R China
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]. ADVANCES IN CLIMATE CHANGE RESEARCH,2022,13(3):421-431.
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),421-431.
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):421-431.