气候变化领域集成服务门户(CCPortal): Laboratory study on the frost-proof performance of a novel embankment dam in seasonally frozen regions

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DOI	10.1016/j.jhydrol.2021.126769
	Laboratory study on the frost-proof performance of a novel embankment dam in seasonally frozen regions
	Zhang, Mingyi; Lu, Jianguo; Pei, Wansheng; Lai, Yuanming; Yan, Zhongrui; Wan, Xusheng
发表日期	2021
ISSN	0022-1694
EISSN	1879-2707
卷号	602
英文摘要	In construction and maintenance of embankment dams in seasonally frozen regions, frost-proof is a key factor to keep the stability of embankment dams, and the water-heat-mechanics process is the basis to reveal the evolution of frost damage for embankment dams in cold regions. In this paper, a novel embankment dam with two-phase closed thermosyphons (TPCTs) for reducing frost heave in seasonally frozen regions was presented. Two embankment dam cases with and without TPCTs during freeze-thaw processes under different reservoir water levels were tested in laboratory. The variations of temperature, volumetric unfrozen water content and deformation were monitored. It is found that, to some extent, the frozen depths at the downstream sides of the two dam cases were larger than those at the upstream sides because of the different thermal properties among the concrete slab, soil materials and reservoir water. Meanwhile, during the cold periods, the frozen depths and vertical deformations at the upstream sides of the embankment dam case 1 with TPCTs were far less than those of the embankment dam case 2 without TPCTs. Furthermore, the volumetric unfrozen water contents for the embankment dam case 1 with TPCTs were larger than those for the embankment dam case 2 without TPCTs at the same freezing position. This is from the fact that, after the TPCTs begin to work during the cold periods, the TPCTs are transferring the heat in the dam from below the reservoir water levels to above it, which effectively reduces the freezing of the embankment dam. Therefore, the embankment dam with TPCTs could be applied as an effective measure to alleviate the frost heave in seasonally frozen regions.
英文关键词	Laboratory study; Frost-proof performance; Embankment dam; TPCT; Reservoir water level; Seasonally frozen regions
语种	英语
WOS研究方向	Engineering ; Geology ; Water Resources
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS关键词	2-PHASE CLOSED THERMOSIPHON ; COOLING CHARACTERISTICS ; HYDROTHERMAL BEHAVIORS ; PERMAFROST REGIONS ; CONCRETE DAMS ; SUNNY SLOPES ; PERMEABILITY ; DEFORMATION ; INSULATION ; PROVINCE
WOS记录号	WOS:000704794400060
来源期刊	JOURNAL OF HYDROLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239552
作者单位	[Zhang, Mingyi; Lu, Jianguo; Pei, Wansheng; Lai, Yuanming] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Lu, Jianguo; Yan, Zhongrui; Wan, Xusheng] Southwest Petr Univ, Sch Civil Engn & Geomat, Chengdu 610513, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Mingyi,Lu, Jianguo,Pei, Wansheng,et al. Laboratory study on the frost-proof performance of a novel embankment dam in seasonally frozen regions[J],2021,602.
APA	Zhang, Mingyi,Lu, Jianguo,Pei, Wansheng,Lai, Yuanming,Yan, Zhongrui,&Wan, Xusheng.(2021).Laboratory study on the frost-proof performance of a novel embankment dam in seasonally frozen regions.JOURNAL OF HYDROLOGY,602.
MLA	Zhang, Mingyi,et al."Laboratory study on the frost-proof performance of a novel embankment dam in seasonally frozen regions".JOURNAL OF HYDROLOGY 602(2021).