Analysis of tower foundation stability along the Qinghai-Tibet Power Transmission Line and impact of the route on the permafrost
文献类型：期刊论文
| 作者 | Yu, Qihao1; Zhang, Zhongqiu2; Wang, Guoshang3; Guo, Lei1; Wang, Xinbin1; Wang, Pengfei2; Bao, Zhenghong2 |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2016 |
| 卷号 | 121页码:205-213 |
| 关键词 | Power transmission line Re-freezing process of foundation soils Foundation displacement Thermosyphon Permafrost |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2015.06.015 |
| 通讯作者 | Yu, Qihao(yuqh@lzb.ac.cn) |
| 英文摘要 | The Qinghai-Tibet Power Transmission Line (QTPTL), crossing about 550 km permafrost regions, was constructed between July 2010 and October 2011. Based on 4 years of field observations since the construction, thermal and displacement performances of tower foundations in permafrost regions along the QTPTL were analyzed. The observational results from 10 monitored towers showed that the re-freezing process of foundation soils of deeply embedded pile foundations largely took 2 to 3 months. While for shallowly-buried footings, it took one to two cold seasons due to the significant thermal impacts of the foundation construction. After the re-freezing, the thermal regimes of foundation soils mainly determined by the thermosyphon cooling and enhanced heat transfer process of the concrete foundation. With the thermosyphon cooling, foundation soils around and under tower foundations cooled significantly and cold bulbs developed under tower foundations. But for shallowly-buried footings without thermosyphon, the maximum thaw near the footings could be as much as 2.0 m greater than that in the natural ground due to enhanced heat transfer process of the concrete footings. Foundation displacement observations at 130 monitored towers showed that the majority of tower foundations suffered subsidence rather than heave during the observational period. The subsidence was considerable in warm, ice-rich permafrost regions. After the tower assembling and line hanging, the subsidence rate of most of tower foundations decreased substantially. Up to the present, all 130 monitored tower foundations had the accumulative subsidence within an allowable range. Experiences and lessons learned from the QTPTL. will be of value for future similar constructions in permafrost regions. (C) 2015 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | FROZEN SOIL ; MODEL PILES ; REGIONS ; EMBANKMENT |
| 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:000367111400021 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557152 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Yu, Qihao |
| 作者单位 | 1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, State Key Lab Frozen Soil Engn, Lanzhou 730000, Gansu, Peoples R China 2.State Grid Qinghai Elect Power Co, Test Elect Power Res Inst, Xining 810008, Peoples R China 3.Gansu Elect Power Design Inst, Lanzhou 730050, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Qihao,Zhang, Zhongqiu,Wang, Guoshang,et al. Analysis of tower foundation stability along the Qinghai-Tibet Power Transmission Line and impact of the route on the permafrost[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2016,121:205-213. |
| APA | Yu, Qihao.,Zhang, Zhongqiu.,Wang, Guoshang.,Guo, Lei.,Wang, Xinbin.,...&Bao, Zhenghong.(2016).Analysis of tower foundation stability along the Qinghai-Tibet Power Transmission Line and impact of the route on the permafrost.COLD REGIONS SCIENCE AND TECHNOLOGY,121,205-213. |
| MLA | Yu, Qihao,et al."Analysis of tower foundation stability along the Qinghai-Tibet Power Transmission Line and impact of the route on the permafrost".COLD REGIONS SCIENCE AND TECHNOLOGY 121(2016):205-213. |
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来源：寒区旱区环境与工程研究所
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