Laboratory investigation on cooling effect of duct-ventilated embankment with a chimney in permafrost regions
文献类型：期刊论文
| 作者 | Zhang, Mingyi1; Lai, Yuanming; Dong, Yuanhong; Li, Shuangyang |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2008-10-01 |
| 卷号 | 54期号:2页码:115-119 |
| 关键词 | Duct-ventilated embankment Chimney Cooling effect Permafrost region |
| ISSN号 | 0165-232X |
| DOI | 10.1016/i.coldregions.2008.06.004 |
| 通讯作者 | Zhang, Mingyi(myzhang@izb.ac.cn) |
| 英文摘要 | In construction and maintenance of road construction in cold regions, permafrost has been the main influence on embankment stability. The cooling effect of duct-ventilated embankments on the underlying soil layers has been recognized as one technique but if the embankment is located such that there is little or no ambient wind, its effectiveness may be limited. In this paper the addition of vertical "chimneys" to the horizontal ventilated ducts was presented and two duct-ventilated embankments with and without a chimney were examined with the similarity theory, and it is found that the chimneys result in more effective cooling effect under windless conditions than if they are not present. The effect is straightforward: when the ambient air temperature is lower than the internal temperature of the embankment, cold air flows into the embankment from the ventilated ducts and out from the chimneys as a result of warming of the air by the internal temperatures in the embankment. When the ambient air temperature is above the internal temperature of the embankment, no strong air flow occurs within the ventilated ducts and the chimneys. The overall result is a net cooling effect through several cycles of varying temperatures and greater than that achieved by horizontal ventilated ducts alone. Therefore, the special duct-ventilated embankment with a chimney should be considered as an effective measure to protect embankment in warm and low wind permafrost regions. (c) 2008 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | RAILWAY |
| 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:000260702400006 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556023 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Zhang, Mingyi |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Frozen Soil Engn Cold & Arid Reg En, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Engn Res Inst, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Mingyi,Lai, Yuanming,Dong, Yuanhong,et al. Laboratory investigation on cooling effect of duct-ventilated embankment with a chimney in permafrost regions[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2008,54(2):115-119. |
| APA | Zhang, Mingyi,Lai, Yuanming,Dong, Yuanhong,&Li, Shuangyang.(2008).Laboratory investigation on cooling effect of duct-ventilated embankment with a chimney in permafrost regions.COLD REGIONS SCIENCE AND TECHNOLOGY,54(2),115-119. |
| MLA | Zhang, Mingyi,et al."Laboratory investigation on cooling effect of duct-ventilated embankment with a chimney in permafrost regions".COLD REGIONS SCIENCE AND TECHNOLOGY 54.2(2008):115-119. |
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来源：寒区旱区环境与工程研究所
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