The thermal effect of differential solar exposure on embankments along the Qinghai-Tibet Railway
文献类型：期刊论文
| 作者 | Wu, Qingbai1; Liu, Yongzhi; Hu, Zeyong |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2011-04-01 |
| 卷号 | 66期号:1页码:30-38 |
| 关键词 | Qinghai-Tibet Railway Thermal effect Sunny and shaded slopes Embankment |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2011.01.001 |
| 通讯作者 | Wu, Qingbai(qbwu@lzb.ac.cn) |
| 英文摘要 | The difference in solar radiation produces a predictable thermal effect on the sunny and shaded slopes of embankments constructed in permafrost regions of the Qinghai-Tibet Highway and Railway, which results in differences in soil temperatures and the permafrost table under the shoulder. From the period 2005 to 2008, a systemic network of 42 sites was established along the Qinghai-Tibet Railway to monitor permafrost conditions and embankment performance. Soil temperatures up to 20 m in depth under the embankment were continuously measured hourly. In this article, we investigate daily mean soil temperatures under embankments for 25 observed sites and the temperature difference under the shoulder for both the sunny and shaded slopes of the embankments. We found significant differences in the thermal effect from the sunny and shaded slopes of the embankments along the Qinghai-Tibet Railway. On the sunny slope of the embankment the cooling process of soils under the shoulder is shorter and the thawing process is longer by 15-30 days than on the shaded slope. The multiyear average temperatures under the shoulder for the sunny slope are higher-0.23-1.58 degrees C with an average of 0.86 degrees C-than those for the shaded slope. The temperature differences in winter (DJF) are much larger than those in summer (JJA). The multiyear mean permafrost table under the shoulder for the sunny slope of the embankment is larger than for the shaded slope, ranging from 0.1 to 3 m. with an average of 1.13 m. However, engineering measures can effectively reduce the thermal effect between the sunny and shaded slopes of embankments, resulting in a decreasing temperature difference that ranges from 0.46 to 0.71 degrees C, with an average of 0.58 degrees C. (C) 2011 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | PERMAFROST REGIONS ; HIGHWAY ; PLATEAU ; SLOPES ; CHINA |
| 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:000288920800004 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556601 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Wu, Qingbai |
| 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 | Wu, Qingbai,Liu, Yongzhi,Hu, Zeyong. The thermal effect of differential solar exposure on embankments along the Qinghai-Tibet Railway[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2011,66(1):30-38. |
| APA | Wu, Qingbai,Liu, Yongzhi,&Hu, Zeyong.(2011).The thermal effect of differential solar exposure on embankments along the Qinghai-Tibet Railway.COLD REGIONS SCIENCE AND TECHNOLOGY,66(1),30-38. |
| MLA | Wu, Qingbai,et al."The thermal effect of differential solar exposure on embankments along the Qinghai-Tibet Railway".COLD REGIONS SCIENCE AND TECHNOLOGY 66.1(2011):30-38. |
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来源：寒区旱区环境与工程研究所
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