气候变化领域集成服务门户(CCPortal): Novel anti-frost subgrade bed structures a high speed railways in deep seasonally frozen ground regions: Experimental and numerical studies

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DOI	10.1016/j.conbuildmat.2020.121266
	Novel anti-frost subgrade bed structures a high speed railways in deep seasonally frozen ground regions: Experimental and numerical studies
	Tai, Bowen; Yue, Zurun; Sun, Tiecheng; Qi, Shouchen; Li, Lei; Yang, Zhihao
通讯作者	Yue, ZR (通讯作者)，Shijiazhuang Tiedao Univ, State Key Lab Mech Behav & Syst Safety Traff Engn, Shijiazhuang 050043, Hebei, Peoples R China.
发表日期	2021
ISSN	0950-0618
EISSN	1879-0526
卷号	269
英文摘要	To reduce the threat of frost damage to the speedy and safe operation of high-speed railways (HSRs) in deep seasonally frozen ground regions, it is necessary to study the anti-frost subgrade bed structure to improve the long-term service performance of HSRs. First, the thermal-mechanical behaviour and preventative efficacy of the original anti-frost subgrade bed structure with graded-crushed rock filling materials are studied. Then, the general change laws of the thermal-mechanical behaviours for embankment engineering in deep seasonally frozen ground regions are revealed. Finally, a finite element model is developed to investigate the anti-frost effects of six novel subgrade bed structures with differential filling materials. The results show that 1) the initial freezing time, initial thawing time and freezing rate of the embankment are substantially different from those of the natural ground; 2) the deformation of the embankment is closely related to the filling depth and frost depth of the embankment. Furthermore, the deformation process is closely related to the seasonal air temperature change; 3) the seasonal frozen depth of the embankment can be reduced by changing the heat entering the subgrade bed and the heat diffusion in the embankment body; and 4) an asphalt concrete pavement + cement stabilized macadam + insulation board subgrade bed structure can best reduce the frost depth. This research provides important technical guidance for the design of the anti-frost subgrade bed structure of the HSR subgrade in deep seasonally frozen ground regions. (C) 2020 Elsevier Ltd. All rights reserved.
关键词	PERMAFROST REGIONS EMBANKMENT HEAVE
英文关键词	Thermal-mechanical behaviour; Anti-frost subgrade bed structure; Filling material; Deep seasonally frozen ground
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering ; Materials Science
WOS类目	Construction & Building Technology ; Engineering, Civil ; Materials Science, Multidisciplinary
WOS记录号	WOS:000604773000041
来源期刊	CONSTRUCTION AND BUILDING MATERIALS
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/254545
作者单位	[Tai, Bowen] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Yue, Zurun; Sun, Tiecheng] Shijiazhuang Tiedao Univ, State Key Lab Mech Behav & Syst Safety Traff Engn, Shijiazhuang 050043, Hebei, Peoples R China; [Sun, Tiecheng; Yang, Zhihao] Shijiazhuang Tiedao Univ, Sch Civil Engn, Shijiazhuang 050043, Hebei, Peoples R China; [Qi, Shouchen; Li, Lei] Fourth Engn Co Ltd, China Railway Bur 14, Jinan 250000, Peoples R China
推荐引用方式 GB/T 7714	Tai, Bowen,Yue, Zurun,Sun, Tiecheng,et al. Novel anti-frost subgrade bed structures a high speed railways in deep seasonally frozen ground regions: Experimental and numerical studies[J]. 中国科学院西北生态环境资源研究院,2021,269.
APA	Tai, Bowen,Yue, Zurun,Sun, Tiecheng,Qi, Shouchen,Li, Lei,&Yang, Zhihao.(2021).Novel anti-frost subgrade bed structures a high speed railways in deep seasonally frozen ground regions: Experimental and numerical studies.CONSTRUCTION AND BUILDING MATERIALS,269.
MLA	Tai, Bowen,et al."Novel anti-frost subgrade bed structures a high speed railways in deep seasonally frozen ground regions: Experimental and numerical studies".CONSTRUCTION AND BUILDING MATERIALS 269(2021).