Nonlinear thermal analysis for Qing-Tibet railway embankments in cold regions
文献类型：期刊论文
| 作者 | Lai, YM; Li, JJ; Niu, FJ; Yu, WB |
| 刊名 | JOURNAL OF COLD REGIONS ENGINEERING
 |
| 出版日期 | 2003-12-01 |
| 卷号 | 17期号:4页码:171-184 |
| 关键词 | embankments railroad tracks China temperature distribution nonlinear analysis cold regions permafrost |
| ISSN号 | 0887-381X |
| DOI | 10.1061/(ASCE)0887-381X(2003)17:4(171) |
| 通讯作者 | Lai, YM() |
| 英文摘要 | Heat convection in ballast mass in railway embankments is a problem of heat convection in porous media. In order to calculate the temperature distribution of the Qing-Tibet railway embankment from the governing equations used to study forced convection for incompressible fluids porous media, detailed finite-element formulas for heat convection in porous media are derived using Galerkin's method. The temperature distributions on central lines of the traditional railway embankment, the ripped-rock embankment, and the ripped-rock revetment embankment that were constructed on July 15, 2002 have been analyzed and compared on July 15, October 15 in the 24th year after construction, and January 15 in the 25th year after construction under the climatic and geological conditions on the Qing-Tibet Railway. The calculated results indicate that the traditional railway embankment will raise the permafrost temperature under the embankment base and make the permafrost embankment thermally unstable. The ripped-rock embankment and the ripped-rock revetment embankment will reduce the permafrost temperature under the embankment base in cold regions, therefore maintaining the thermal stability of permafrost. However, the ripped-rock embankment needs more rock mass while the ripped-rock revetment embankment need less rock mass, and its construction cost is lower than that of the former. Therefore, it is highly recommended that the ripped-rock revetment embankment be used for the Qing-Tibet railway embankment structure in high temperature permafrost regions so that the permafrost embankment can be protected as much as possible. |
| 收录类别 | SCI |
| WOS关键词 | POROUS-MEDIA ; NATURAL-CONVECTION ; MASS-TRANSFER ; HEAT ; CONDUCTIVITY |
| WOS研究方向 | Engineering ; Geology |
| WOS类目 | Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000186727600004 |
| 出版者 | ASCE-AMER SOC CIVIL ENGINEERS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556850 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Lai, YM |
| 作者单位 | Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Forzen Soil Engn, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lai, YM,Li, JJ,Niu, FJ,et al. Nonlinear thermal analysis for Qing-Tibet railway embankments in cold regions[J]. JOURNAL OF COLD REGIONS ENGINEERING,2003,17(4):171-184. |
| APA | Lai, YM,Li, JJ,Niu, FJ,&Yu, WB.(2003).Nonlinear thermal analysis for Qing-Tibet railway embankments in cold regions.JOURNAL OF COLD REGIONS ENGINEERING,17(4),171-184. |
| MLA | Lai, YM,et al."Nonlinear thermal analysis for Qing-Tibet railway embankments in cold regions".JOURNAL OF COLD REGIONS ENGINEERING 17.4(2003):171-184. |
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来源：寒区旱区环境与工程研究所
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