Cooling effect of ripped-stone embankments on Qing-Tibet railway under climatic warming
文献类型：期刊论文
| 作者 | Lai, YM; Zhang, LX; Zhang, SJ; Mi, L |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2003-03-01 |
| 卷号 | 48期号:6页码:598-604 |
| 关键词 | cooling effect ripped-stone embankment climatic warming |
| ISSN号 | 1001-6538 |
| 通讯作者 | Lai, YM() |
| 英文摘要 | The heat convection in ballast mass and ripped-stone mass in railway embankments is the problem of heat convection in porous media. In order to calculate the temperature distribution of Qing-Tibet railway embankment, from the governing equations used to study forced convection for incompressible fluids porous media, the finite element formulae for heat convection in porous media are derived by using Galerkin's method. The temperature fields of the traditional ballast embankment and the ripped-stone mass embankment, constructed on July 15, have been analyzed and compared under the case that the air temperature in Qinghai-Tibetan Plateau will be warmed up by 2.0degreesC in the future 50 years. The calculated results indicate that, the permafrost 5 m below the traditional ballast embankment will be thawed in the regions in which the air yearly-average temperature is larger than -3.5degreesC or the yearly-average temperature at the native surface is larger than -1degreesC. The embankment will cause large thawing settlement. The railway embankment will be damaged by permafrost degradation. The ripped-stone mass embankment can not only resist the effect of climatic warm up on it but also provide cool energy for the permafrost under it. It can assure permafrost stability and not subjected to thawing. Therefore, it is highly recommended that the ripped-stone mass embankment be taken as the Qing-Tibet railway embankment structure in high-temperature permafrost regions so that permafrost embankment can be protected as possible as we could. |
| 收录类别 | SCI |
| WOS关键词 | STAGNANT THERMAL-CONDUCTIVITY ; POROUS-MEDIA ; NATURAL-CONVECTION ; MASS-TRANSFER ; HEAT |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000182036500020 |
| 出版者 | SCIENCE CHINA PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556893 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Lai, YM |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 2.No Jiaotong Univ, Dept Civil Engn, Beijing 100044, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lai, YM,Zhang, LX,Zhang, SJ,et al. Cooling effect of ripped-stone embankments on Qing-Tibet railway under climatic warming[J]. CHINESE SCIENCE BULLETIN,2003,48(6):598-604. |
| APA | Lai, YM,Zhang, LX,Zhang, SJ,&Mi, L.(2003).Cooling effect of ripped-stone embankments on Qing-Tibet railway under climatic warming.CHINESE SCIENCE BULLETIN,48(6),598-604. |
| MLA | Lai, YM,et al."Cooling effect of ripped-stone embankments on Qing-Tibet railway under climatic warming".CHINESE SCIENCE BULLETIN 48.6(2003):598-604. |
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来源：寒区旱区环境与工程研究所
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