气候变化领域集成服务门户(CCPortal): Numerical simulation for vibration-induced settlement and permanent deformation accumulation in permafrost subgrades of the Qinghai-Tibet Railway

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DOI	10.1016/j.compgeo.2023.106047
	Numerical simulation for vibration-induced settlement and permanent deformation accumulation in permafrost subgrades of the Qinghai-Tibet Railway
	Tang, Chen-xuan; Zhu, Zhan-yuan; Ma, Yong; Yao, Zhi; Tan, Qiu-tong; Liu, Zheng-yu; Xu, Jiao; Zheng, Si-cheng
发表日期	2024
ISSN	0266-352X
EISSN	1873-7633
卷号	167
英文摘要	Train-induced vibrations critically influence permafrost subgrade deformation. This study used ABAQUS secondary development to establish a finite element model of vibration-induced settlement for permafrost subgrades in the Qinghai-Tibet Railway (QTR) based on a cumulative plastic strain model. A numerical simulation method for cumulative vibration-induced settlement prediction considering seasonality, vibration frequency, train types, and global warming was proposed. The scientificity of the simulation was verified by monitoring data. Then, the influences of embankment height, ice-rich permafrost thickness, and initial mean annual ground temperature (MAGT) of the site on cumulative vibration-induced settlement and permanent deformation accumulation in permafrost subgrades were analysed. The study further quantitatively evaluated cumulative dynamic and static deformation in the DK1136 section under various global warming conditions. The results indicate that cumulative vibration-induced settlement primarily occurs near the ice-rich permafrost layer and is significantly influenced by ground temperature. Permanent deformation accumulation increases with increasing embankment height, ice-rich permafrost thickness and initial MAGT of the site. Permanent deformation accumulation primarily results from thaw consolidation of the permafrost layer, with vibration-induced settlement contributing approximately 20 %. For permafrost regions, an optimal railway embankment height of 3-3.5 m and effective mitigation of settlement issues involve lowering the ground temperature and the embankment weight. These findings provide essential insights for subgrade challenges in permafrost regions.
关键词	Permafrost subgrade Vibration-induced settlement Permanent deformation accumulation Settlement prediction Qinghai-Tibet Railway
英文关键词	CONSOLIDATION; EMBANKMENTS; PLATEAU; REGIONS; DESIGN
WOS研究方向	Computer Science, Interdisciplinary Applications ; Engineering, Geological ; Geosciences, Multidisciplinary
WOS记录号	WOS:001156007900001
来源期刊	COMPUTERS AND GEOTECHNICS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/282848
作者单位	Sun Yat Sen University; Sichuan Agricultural University
推荐引用方式 GB/T 7714	Tang, Chen-xuan,Zhu, Zhan-yuan,Ma, Yong,et al. Numerical simulation for vibration-induced settlement and permanent deformation accumulation in permafrost subgrades of the Qinghai-Tibet Railway[J],2024,167.
APA	Tang, Chen-xuan.,Zhu, Zhan-yuan.,Ma, Yong.,Yao, Zhi.,Tan, Qiu-tong.,...&Zheng, Si-cheng.(2024).Numerical simulation for vibration-induced settlement and permanent deformation accumulation in permafrost subgrades of the Qinghai-Tibet Railway.COMPUTERS AND GEOTECHNICS,167.
MLA	Tang, Chen-xuan,et al."Numerical simulation for vibration-induced settlement and permanent deformation accumulation in permafrost subgrades of the Qinghai-Tibet Railway".COMPUTERS AND GEOTECHNICS 167(2024).