气候变化领域集成服务门户(CCPortal): Moisture-temperature changes and freeze-thaw hazards on a canal in seasonally frozen regions

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DOI	10.1007/s11069-013-1021-3
	Moisture-temperature changes and freeze-thaw hazards on a canal in seasonally frozen regions
	Li, Shuangyang; Lai, Yuanming; Pei, Wansheng; Zhang, Shujuan; Zhong, Hua
发表日期	2014
ISSN	0921-030X
EISSN	1573-0840
起始页码	287
结束页码	308
卷号	72 期号:2
英文摘要	Freeze-thaw action is a complex moisture-heat-mechanics interaction process, which has caused prevailing and severe damages to canals in seasonally frozen regions. Up to now, the detailed frost damage mechanism has not been well disclosed. To explore the freeze-thaw damage mechanism of the canal in cold regions, a numerical moisture-heat-mechanics model is established and corresponding computer program is written. Then, a representative canal in the northeast of China is taken as an example to simulate the freeze-thaw damage process. Meanwhile, the robustness of the numerical model and program is tested by some in situ data. Lastly, the numerical results show that there are dramatic water migration and redistribution in the seasonal freeze-thaw variation layer, causing repetitive frost heave and thaw settlement, and tension-compression stresses. Therefore, the strengths of soil are reduced after several freeze-thaw cycles. Further, the heavy denudation damage and downslope movement of the canal slope would be quite likely triggered in seasonally frozen regions. These zones should be monitored closely to ensure safe operation. As a preliminary study, the numerical model and results in this paper may be a reference for design, maintenance, and research on other canals in seasonally frozen regions.
英文关键词	Canal; Seasonally frozen regions; Frozen ground; Frost heave; Thaw settlement; Numerical model
语种	英语
WOS研究方向	Geology ; Meteorology & Atmospheric Sciences ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences ; Water Resources
WOS关键词	UNSATURATED SOILS ; MASS-TRANSFER ; HEAT
WOS记录号	WOS:000335827100001
来源期刊	NATURAL HAZARDS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239503
作者单位	[Li, Shuangyang; Lai, Yuanming; Pei, Wansheng; Zhang, Shujuan] Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China; [Zhong, Hua] Heilongjiang Prov Hydraul Res Inst, Harbin 150080, Heilongjiang, Peoples R China
推荐引用方式 GB/T 7714	Li, Shuangyang,Lai, Yuanming,Pei, Wansheng,et al. Moisture-temperature changes and freeze-thaw hazards on a canal in seasonally frozen regions[J],2014,72(2).
APA	Li, Shuangyang,Lai, Yuanming,Pei, Wansheng,Zhang, Shujuan,&Zhong, Hua.(2014).Moisture-temperature changes and freeze-thaw hazards on a canal in seasonally frozen regions.NATURAL HAZARDS,72(2).
MLA	Li, Shuangyang,et al."Moisture-temperature changes and freeze-thaw hazards on a canal in seasonally frozen regions".NATURAL HAZARDS 72.2(2014).