Analysis of cooling effect of crushed rock-based embankment of the Qinghai-Xizang Railway
文献类型：期刊论文
| 作者 | Wu Qingbai1,2; Lu Zijian1; Tingjun Zhang2; Ma Wei1; Liu Yongzhi1 |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2008-08-01 |
| 卷号 | 53期号:3页码:271-282 |
| 关键词 | Qinghai-Xizang Railway Permafrost engineering Crushed rock-based embankment Cooling effect |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2007.10.004 |
| 通讯作者 | Wu Qingbai(qbwu@lzb.ac.cn) |
| 英文摘要 | Crushed rock-based embankment (CRBE) is one of the techniques for protecting permafrost from warming and thawing along the newly constructed Qinghai-Xizang Railway, and has been widely used over warm and ice-rich permafrost. Since 2002, six sites along the Qinghai-Xizang railway have been monitored for changes in soil temperatures and position of the permafrost table under the original natural ground surface and the CRBE. The results show that the CRBE can effectively cool the roadbed, resulting in the decrease of permafrost temperatures and rise of the permafrost table. However, the cooling effect is significantly different over warm and relatively cold permafrost areas. In relatively cold permafrost areas, defined as permafrost with the mean annual ground temperature at depth of zero annual amplitude lower than -1.0 degrees C, the CRBE is much more effective for cooling permafrost and raising the permafrost table. The cooling effect during winter months is significantly greater than the warming effect during summer months, indicating that the CRBE has an overall impact in decreasing permafrost temperatures. In warm permafrost areas, defined as permafrost with the mean annual ground temperature at the depth of zero annual amplitude higher than -1.0 degrees C, the CRBE is effective in raising the permafrost table but not quite effective in lowering permafrost temperatures. However, the soil temperatures near the new permafrost table are very close to 0 degrees C and extremely sensitive to change, Any minimum surface disturbance or climate change impact could potentially increase permafrost surface temperature and result in deepening in the permafrost table. The thermal offset between the top and bottom of the crushed rock layer shows that the decreasing trend of soil temperatures indicates a weak cooling effectiveness for the CRBE. Overall, the CRBE technique can be widely applied in relatively cold permafrost regions, but its application in warm permafrost areas needs further investigations and monitoring. (C) 2007 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | TIBET HIGHWAY ; PERMAFROST |
| 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:000260040200004 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2556079 |
| 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 Environm & Engn Res Inst, Lanzhou 730000, Gansu, Peoples R China 2.Univ Colorado, Cooperat Inst Res Environm Sci, Natl Snow & Ice Data Ctr, Boulder, CO 80309 USA |
| 推荐引用方式 GB/T 7714 | Wu Qingbai,Lu Zijian,Tingjun Zhang,et al. Analysis of cooling effect of crushed rock-based embankment of the Qinghai-Xizang Railway[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2008,53(3):271-282. |
| APA | Wu Qingbai,Lu Zijian,Tingjun Zhang,Ma Wei,&Liu Yongzhi.(2008).Analysis of cooling effect of crushed rock-based embankment of the Qinghai-Xizang Railway.COLD REGIONS SCIENCE AND TECHNOLOGY,53(3),271-282. |
| MLA | Wu Qingbai,et al."Analysis of cooling effect of crushed rock-based embankment of the Qinghai-Xizang Railway".COLD REGIONS SCIENCE AND TECHNOLOGY 53.3(2008):271-282. |
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来源：寒区旱区环境与工程研究所
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