Investigation of an icing near a tower foundation along the Qinghai-Tibet Power Transmission Line
文献类型：期刊论文
| 作者 | You, Yanhui1; Yang, Mingbin2; Yu, Qihao1; Wang, Xinbin1; Li, Xiaoning1; Yue, Yongyu1 |
| 刊名 | COLD REGIONS SCIENCE AND TECHNOLOGY
 |
| 出版日期 | 2016 |
| 卷号 | 121页码:250-257 |
| 关键词 | Ground icing Sub-permafrost groundwater Electrical resistivity tomography (ERT) |
| ISSN号 | 0165-232X |
| DOI | 10.1016/j.coldregions.2015.05.005 |
| 通讯作者 | Yu, Qihao(yuqh@lzb.ac.cn) |
| 英文摘要 | Formation of ground icings is generally groundwater-related, and ground icings can occur naturally or under anthropogenic influences, or a combination. The evaluative study for the relevant problems of ground icings is important for the design, construction and maintenance of engineering projects in regions affected by ground freezing. Construction of the Qinghai-Tibet Power Transmission Line (QTPTL) was completed in September, 2011. A secondary ground icing was founded near one of the tower foundations in the Tuotuo'he Riverside section in the followed winter. The genesis and formation process of the icing were investigated, using the combined methods of electrical resistivity tomography (ERT), drilling, and ground temperature monitoring. The tower foundation is located on the first river terrace of the Tuotuohe River. The ice-rich, very warm (about -0.05 degrees C) and thin (about 5 m) permafrost and the sub-permafrost groundwater were identified. These conditions are conducive to the growth of ground icing. The embedment of the pile foundations for the QTPTL and the ensued connection of the sub-permafrost water with surface waters are the major causes of the icing. In the subsequent freeze-thawing processes, due to cooling by thermosyphons installed very close to the tower foundation, the ground refreezing prevented the discharge of the sub-permafrost water. The hydrodynamics related to the ground icing growth impacted most of the area with embedded piles, which may influence the adfreezing force, frictional force and tower foundation stability. In the context of climate warming, secondary ground icings may become more hazardous to the permafrost power line. Freezing the soil around the tower foundation or lowering the groundwater table may be effective methods for mitigating the re-occurrence of ground icing. Future work should monitor the pressure, flow and geochemical characteristics of subpermafrost water, by which more proofs will be provided for studying the occurrence and growth of ground icings. (C) 2015 Elsevier B.V. All rights reserved. |
| 收录类别 | SCI |
| WOS关键词 | YUKON-TERRITORY ; PERMAFROST ; PLATEAU ; CANADA |
| 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:000367111400025 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2557163 |
| 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 Soils Engn, Lanzhou 730000, Peoples R China 2.State Grid Qinghai Elect Power Co, Xining 810008, Peoples R China |
| 推荐引用方式 GB/T 7714 | You, Yanhui,Yang, Mingbin,Yu, Qihao,et al. Investigation of an icing near a tower foundation along the Qinghai-Tibet Power Transmission Line[J]. COLD REGIONS SCIENCE AND TECHNOLOGY,2016,121:250-257. |
| APA | You, Yanhui,Yang, Mingbin,Yu, Qihao,Wang, Xinbin,Li, Xiaoning,&Yue, Yongyu.(2016).Investigation of an icing near a tower foundation along the Qinghai-Tibet Power Transmission Line.COLD REGIONS SCIENCE AND TECHNOLOGY,121,250-257. |
| MLA | You, Yanhui,et al."Investigation of an icing near a tower foundation along the Qinghai-Tibet Power Transmission Line".COLD REGIONS SCIENCE AND TECHNOLOGY 121(2016):250-257. |
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来源：寒区旱区环境与工程研究所
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