气候变化领域集成服务门户(CCPortal): Studies for Frost Heave Characteristics and the Prevention of the High-Speed Railway Roadbed in the Zoige Wetland, China

CCPortal

DOI	10.3389/feart.2021.678655
	Studies for Frost Heave Characteristics and the Prevention of the High-Speed Railway Roadbed in the Zoige Wetland, China
	Niu, Fujun; Hu, He; Liu, Minghao; Ma, Qinguo; Su, Wenji
通讯作者	Hu, H (通讯作者)，South China Univ Technol, State Key Lab Subtrop Bldg Sci, Guangzhou, Peoples R China. ; Hu, H (通讯作者)，South China Univ Technol, South China Inst Geotech Engn, Sch Civil Engn & Transportat, Guangzhou, Peoples R China. ; Liu, MH (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China.
发表日期	2021
EISSN	2296-6463
卷号	9
英文摘要	The Xining-Chengdu high-speed railway crosses the Zoige Wetland, located on the northeast edge of the Qinghai-Tibet Plateau and the upper reaches of the Yellow River. The cold climate and frost-heave-sensitive subgrade soil cause a large frost heave deformation of the roadbed, threatening the safety of trains. This article systematically studied the ground temperature development, frost heave characteristics, soil water content, and groundwater level variations by field investigation and monitoring. The maximum frost heave deformations of the natural flat ground and hillslope reached 25.64 and 3.17 mm, respectively, and this significant discrepancy was mainly caused by the groundwater supply conditions. Future roadbed stability on the flat ground may be compromised by frost heave deformation. To solve this problem, contrasting indoor tests were conducted to analyze the frost heave characteristics of natural ground clay and replacement coarse-grained soil (CGS). It was shown that the absorbed external water mainly changed into dispersed pore ice in the freezing CGS, while it mainly changed into the layered ice lens in the freezing clay. Further tests showed that the frost susceptibility of the CGS was proportional to the fines content and initial water content. The poorly graded CGS had weaker frost susceptibility than the well-graded CGS. The results suggest that anti-frost methods should be fully considered, including strict control of fines content and water content, prioritizing the use of poorly graded filling, and disruption of local water accumulation in the filling layer.
关键词	EMBANKMENT PREDICTION SETTLEMENT SUBGRADE MODEL
英文关键词	zoige wetland; high-speed railway; frost heave prevention; coarse-grained soil; field monitoring
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000684611700002
来源期刊	FRONTIERS IN EARTH SCIENCE
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/254360
作者单位	[Niu, Fujun; Hu, He; Ma, Qinguo; Su, Wenji] South China Univ Technol, State Key Lab Subtrop Bldg Sci, Guangzhou, Peoples R China; [Niu, Fujun; Hu, He; Ma, Qinguo; Su, Wenji] South China Univ Technol, South China Inst Geotech Engn, Sch Civil Engn & Transportat, Guangzhou, Peoples R China; [Niu, Fujun; Liu, Minghao] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Niu, Fujun,Hu, He,Liu, Minghao,et al. Studies for Frost Heave Characteristics and the Prevention of the High-Speed Railway Roadbed in the Zoige Wetland, China[J]. 中国科学院西北生态环境资源研究院,2021,9.
APA	Niu, Fujun,Hu, He,Liu, Minghao,Ma, Qinguo,&Su, Wenji.(2021).Studies for Frost Heave Characteristics and the Prevention of the High-Speed Railway Roadbed in the Zoige Wetland, China.FRONTIERS IN EARTH SCIENCE,9.
MLA	Niu, Fujun,et al."Studies for Frost Heave Characteristics and the Prevention of the High-Speed Railway Roadbed in the Zoige Wetland, China".FRONTIERS IN EARTH SCIENCE 9(2021).