Preliminary study on cooling effect mechanisms of Qinghai-Tibet railway embankment with open crushed-stone side slope in permafrost regions
文献类型：期刊论文
| 作者 | Li, Guoyu; Li, Ning; Kang, Jiamei |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2006-09-01 |
| 卷号 | 45期号:3页码:193-201 |
| ISSN号 | 0165-232X |
| 关键词 | Qinghai-Tibet railway embankment with open crushed-stone side slope temperature field velocity field heat flow cooling effect |
| DOI | 10.1016/j.coldregions.2006.05.002 |
| 通讯作者 | Li, Ning(ningli@lzb.ac.cn) |
| 英文摘要 | The embankment with open crushed-stone side slope (EOCSSS) in permafrost regions is an effective measure to cool subgrade and protect permafrost along the Qinghai-Tibet railway. According to the air temperature condition and geological condition at Beiluhe Test Base on the Qinghai-Tibet Plateau, the numerical analyses for the temperature field, velocity field and heat flow of the EOCSSS at Beiluhe Test Base along Qinghai-Tibet railway were conducted both during daily period and annual period to study the mechanisms of the cooling effect of the EOCSSS in the present paper. The results show: (1) The EOCSSS has cooling effect during summer nighttime, which is different from the traditional views; (2) The open crushed-stone side slope has "heat shield" effect due to the solar shading during warm months and the EOCSSS releases more heat during cold months than that absorbed during warm months according to the results of the heat flow computed, which is beneficial for protecting permafrost beneath railway embankment and keeping thermal stability of the railway embankment; (3) The major type of heat transfer of crushed-stone side slope is the forced convection according to the velocity characteristics showed; (4) The main mechanisms of the cooling effect of the EOCSSS are the "heat shield" effect due to the solar shading of the crushed-stone side slope and the heat flow difference, which results from the velocity difference of the pore air in the open crushed-stone side slope during daily period and annual period. (c) 2006 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS研究方向 | Engineering ; Geology |
| WOS类目 | Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000240280300007 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555765 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Li, Ning |
| 作者单位 | 1.Chinese Acad Sci, State Key Lab Frozen Soil Engn, CAREERI, Lanzhou 730000, Gansu, Peoples R China 2.Xian Univ Technol, Inst Geotech Engn, Xian 710048, Shanxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Guoyu,Li, Ning,Kang, Jiamei. Preliminary study on cooling effect mechanisms of Qinghai-Tibet railway embankment with open crushed-stone side slope in permafrost regions[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2006,45(3):193-201. |
| APA | Li, Guoyu,Li, Ning,&Kang, Jiamei.(2006).Preliminary study on cooling effect mechanisms of Qinghai-Tibet railway embankment with open crushed-stone side slope in permafrost regions.COLD REGIONS SCIENCE AND TECHNOLOGY,45(3),193-201. |
| MLA | Li, Guoyu,et al."Preliminary study on cooling effect mechanisms of Qinghai-Tibet railway embankment with open crushed-stone side slope in permafrost regions".COLD REGIONS SCIENCE AND TECHNOLOGY 45.3(2006):193-201. |
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来源：寒区旱区环境与工程研究所
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