气候变化领域集成服务门户(CCPortal): Deformation behaviour and influence mechanism of thaw consolidation of embankments on the Qinghai-Tibet Railway in permafrost regions

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DOI	10.1016/j.trgeo.2021.100513
	Deformation behaviour and influence mechanism of thaw consolidation of embankments on the Qinghai-Tibet Railway in permafrost regions
	Tang, Chen-xuan; Zhu, Zhan-yuan; Luo, Fei; He, Zong-hang; Zou, Zu-yin; Guo, Zi-hong
通讯作者	Zhu, ZY (通讯作者)，Sichuan Agr Univ, Coll Civil Engn, Dujiangyan 611830, Peoples R China.
发表日期	2021
ISSN	2214-3912
卷号	28
英文摘要	With the thermal disturbance caused by engineering construction and global warming, thaw consolidation has become a primary source of subgrade deformation in permafrost regions. Based on the large-strain consolidation theory described by the updated Lagrangian, we study the thermal stability and the thaw consolidation in an ordinary subgrade at the warm and ice-rich permafrost (WIRP) site of the Beiluhe Qinghai-Tibet Railway (QTR) by establishing a thermo-mechanical coupled model. The research results are as follows: The initial mean annual ground temperature (MAGT) of the site influences the permafrost degradation on the Qinghai-Tibet Plateau due to construction and climate warming, exacerbating the thaw consolidation and creep of the ice-rich permafrost. The settlement rate and subgrade settlement increase with increasing embankment height, ice-rich permafrost layer thickness, and initial MAGT. Railway maintenance methods, such as ballast filling and track lifting, increase the subgrade weight, thus increasing the WIRP subgrade settlement. Furthermore, we predict the thaw consolidation of the DK1136 section of the QTR for the next 50 years. The prediction formulas of the cumulative settlements of the subgrade top and permafrost are established, and various suggestions for maintaining the railway subgrade of the WIRP site are proposed.
关键词	FINITE-ELEMENT-ANALYSIS PLATEAU SETTLEMENT STABILITY CLIMATE WARM
英文关键词	Permafrost degradation; Settlement deformation; Thaw consolidation; Large strain finite element; Railway subgrade
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Civil ; Engineering, Geological
WOS记录号	WOS:000642462600001
来源期刊	TRANSPORTATION GEOTECHNICS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254412
作者单位	[Tang, Chen-xuan; Zhu, Zhan-yuan; Luo, Fei; He, Zong-hang; Zou, Zu-yin; Guo, Zi-hong] Sichuan Agr Univ, Coll Civil Engn, Dujiangyan 611830, Peoples R China; [Tang, Chen-xuan; Zhu, Zhan-yuan; Luo, Fei; He, Zong-hang; Zou, Zu-yin; Guo, Zi-hong] Sichuan Higher Educ Engn Res Ctr Disaster Prevent, Dujiangyan 611830, Peoples R China; [Zhu, Zhan-yuan; Luo, Fei] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Luo, Fei] Sichuan Univ, Coll Post Disaster Reconstruct & Management, Chengdu 610207, Peoples R China
推荐引用方式 GB/T 7714	Tang, Chen-xuan,Zhu, Zhan-yuan,Luo, Fei,et al. Deformation behaviour and influence mechanism of thaw consolidation of embankments on the Qinghai-Tibet Railway in permafrost regions[J]. 中国科学院西北生态环境资源研究院,2021,28.
APA	Tang, Chen-xuan,Zhu, Zhan-yuan,Luo, Fei,He, Zong-hang,Zou, Zu-yin,&Guo, Zi-hong.(2021).Deformation behaviour and influence mechanism of thaw consolidation of embankments on the Qinghai-Tibet Railway in permafrost regions.TRANSPORTATION GEOTECHNICS,28.
MLA	Tang, Chen-xuan,et al."Deformation behaviour and influence mechanism of thaw consolidation of embankments on the Qinghai-Tibet Railway in permafrost regions".TRANSPORTATION GEOTECHNICS 28(2021).