Experimental study on influence of particle size on cooling effect of crushed-rock layer under closed and open tops
文献类型：期刊论文
| 作者 | Zhang, Mingyi; Lai, Yuanming; Yu, Wenbing; Huang, Zhijun |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2007-06-01 |
| 卷号 | 48期号:3页码:232-238 |
| 关键词 | crushed-rock layer particle size closed and open tops cooling effect permafrost |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2006.12.003 |
| 通讯作者 | Lai, Yuanming(ymlai@lzb.ac.cn) |
| 英文摘要 | A series of Laboratory studies were carried out on the cooling effects of crushed rock layers with different particle sizes under closed and open tops. The thicknesses of crushed-rock layers are 130 cm and the mean particle sizes are 8.3 cm, 14.8 cm, 22.1 cm and 27.1 cm, respectively. The experimental results indicate that the cooling effects of the crushed-rock layers with open tops are less than those with closed tops under the same experimental conditions. Under closed top, the crushed-rock layers with different particle sizes have a similar cooling tendency and good cooling effects on the underlying soil layers; however, the cooling effect is best when the mean particle size is 22.1 cm. Under open top, the crushed-rock layers have some cooling effects and their bottom mean periodic temperatures are below 0 degrees C when their mean particle sizes are from 14.8 to 27.1 cm; however, the crushed-rock layer with mean particle size of 8.3 cm does not result in its bottom mean periodic temperature lower than the ambient temperature (about 0.5 degrees C) in the model box. The periodic temperature ranges at the bottoms of crushed-rock layers under open top are far larger than those under closed top. The particle size has little influence on the bottom periodic temperature range under closed top, however, the influence is more obvious under open top. Therefore, if the cooling characteristics of crushed-rock layers with different particle sizes under open and closed tops can be reasonably utilized in cold regions engineering, the underlying permafrost can be effectively protected and cost can been reduced. (c) 2007 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | CONVECTION HEAT-TRANSFER ; QINGHAI-TIBETAN RAILWAY ; PERMAFROST REGIONS ; POROUS-MEDIUM ; BOUNDARY-CONDITIONS ; NATURAL-CONVECTION ; EMBANKMENTS ; AIR |
| 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:000246438600005 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2555933 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Lai, Yuanming |
| 作者单位 | Chinese Acad Sci, State Key Lab Frozen Soil Engn, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Mingyi,Lai, Yuanming,Yu, Wenbing,et al. Experimental study on influence of particle size on cooling effect of crushed-rock layer under closed and open tops[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2007,48(3):232-238. |
| APA | Zhang, Mingyi,Lai, Yuanming,Yu, Wenbing,&Huang, Zhijun.(2007).Experimental study on influence of particle size on cooling effect of crushed-rock layer under closed and open tops.COLD REGIONS SCIENCE AND TECHNOLOGY,48(3),232-238. |
| MLA | Zhang, Mingyi,et al."Experimental study on influence of particle size on cooling effect of crushed-rock layer under closed and open tops".COLD REGIONS SCIENCE AND TECHNOLOGY 48.3(2007):232-238. |
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来源：寒区旱区环境与工程研究所
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