Cooling effects study on ventilated embankments under the influence of the temperature differences between the sunny slopes and the shady slopes
文献类型：期刊论文
| 作者 | Kun, Zhang; Li, Dongqing; Niu Fujun; Mu Yanhu |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2011-02-01 |
| 卷号 | 65期号:2页码:226-233 |
| 关键词 | Permafrost tables Temperature field characteristics The sunny and shady slope The duct-ventilated embankment The closed crushed rock revetment |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2010.08.005 |
| 通讯作者 | Li, Dongqing(dqli@lzb.ac.cn) |
| 英文摘要 | Based on theories of heat and mass transfer, three-dimensional theoretical and numerical models were presented to analyze the temperature characteristics of embankments in permafrost regions. Conditions of air convective within crushed rock layer and the background of the climate warming in the future were considered. In addition, temperature differences between the sunny and shady slopes of embankments, as well as the uneven distribution of air temperatures inside the ventilated duct were also considered in the models. Cooling effects and temperature field characteristics of three kinds of embankments were analyzed and compared. Results of traditional embankment indicated that there were significant differences in permafrost tables between the sunny and shady slopes, and the underlying permafrost was in serious degradation. A large asymmetric 0 C melting bulb was formed in and beneath the embankment over winter time. The analysis indicated that the duct-ventilated embankment could lower the temperature of underlying permafrost, and elevate the permafrost table under the embankment. The duct-ventilated embankment could also adjust the differences of permafrost tables, and improve the asymmetry of the temperature fields between the sunny and shady slopes. Due to climate warming, however, a 0 degrees C melting bulb still developed at the sunny slope foot of the duct-ventilated embankment. To prevent the 0 degrees C melting bulb from occurring, a closed crushed rock revetment was applied on the sunny slope, and the results indicated that the cooling effect of duct-ventilated embankment with the closed crushed rock revetment was better than that without the closed crushed rock revetment. Soils in and beneath the duct-ventilated embankment with closed crushed rock revetment could refreeze completely over winter time and this kind of embankment could also effectively adjust the differences of permafrost tables between the sunny and shady slopes. (C) 2010 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | QINGHAI-TIBET RAILWAY ; CRUSHED-ROCK REVETMENT ; PERMAFROST REGIONS ; WARM PERMAFROST ; COLD REGIONS ; LAYER ; CONVECTION |
| 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:000286860200012 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556492 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Li, Dongqing |
| 作者单位 | Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Kun, Zhang,Li, Dongqing,Niu Fujun,et al. Cooling effects study on ventilated embankments under the influence of the temperature differences between the sunny slopes and the shady slopes[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2011,65(2):226-233. |
| APA | Kun, Zhang,Li, Dongqing,Niu Fujun,&Mu Yanhu.(2011).Cooling effects study on ventilated embankments under the influence of the temperature differences between the sunny slopes and the shady slopes.COLD REGIONS SCIENCE AND TECHNOLOGY,65(2),226-233. |
| MLA | Kun, Zhang,et al."Cooling effects study on ventilated embankments under the influence of the temperature differences between the sunny slopes and the shady slopes".COLD REGIONS SCIENCE AND TECHNOLOGY 65.2(2011):226-233. |
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来源：寒区旱区环境与工程研究所
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