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首页> 中文期刊> 《寒旱区科学（英文版）》 >Problems and countermeasures in construction of transmission line projects in permafrost regions

Problems and countermeasures in construction of transmission line projects in permafrost regions

         
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摘要

Construction of power transmission lines is becoming an important part of permafrost engineering in China. This paper reviews the construction status and problems of transmission lines in different countries, as well as corresponding solutions that would be of practical significance for sustainable engineering practices. Russia has the longest history of transmission line construction in permafrost areas, with transmission lines (mainly 220 kV and 500 kV) spanning approximately 100,000 km. However, all countries suffer from permafrost-related tower foundation stability problems caused by freez-ing-thawing hazards such as frost heave and thaw settlement, frost lifting, and harmful cryogenic phenomena. As point-line transmission line constructions, the lines, poles and towers should be reasonably selected and installed with a comprehensive consideration of frozen soil characteristics to effectively reduce the occurrence of freezing-thawing dis-asters. Reinforced concrete pile foundations are widely used in the permafrost regions, and construction in winter is also a universal practice. Moreover, facilitating engineering measures like thermosyphons are an effective way to reduce freez-ing-thawing hazards and to maintain the stability of tower foundations.

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  • 来源
    《寒旱区科学（英文版）》 |2014年第5期|432-439|共8页
  • 作者

    GuoShang Wang; QiHao Yu; YanHui You; Ze Zhang; Lei Guo; ShiJun Wang; Yong Yu;

  • 作者单位

    Gansu Electric Power Design Institute, Lanzhou, Gansu 730050, China;

    State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;

    State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;

    State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;

    State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou, Gansu 730000, China;

    Gansu Power Transmission Transformation Company, Lanzhou, Gansu 730050, China;

    Gansu Electric Power Design Institute, Lanzhou, Gansu 730050, China;

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  • 正文语种 eng
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