| 冻土区输电线路塔基选位的影响因素分析 |
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| 引用本文： | 程东幸,张建民,刘厚健,俞祁浩,刘志伟.冻土区输电线路塔基选位的影响因素分析[J].力学学报,2009,17(3):329-334. |
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| 作者姓名： | 程东幸 张建民 刘厚健 俞祁浩 刘志伟 |
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| 作者单位： | 中国科学院微重力重点实验室，中国科学院力学研究所 中国科学院微重力重点实验室，中国科学院力学研究所 中国科学院微重力重点实验室，中国科学院力学研究所 中国科学院微重力重点实验室，中国科学院力学研究所 |
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| 摘 要： | 采用粒子图像测速技术(PIV)对两层流体Bénard-Marangoni对流进
行了实验研究. 研究了各种不同厚度比下的临界对流模式，同时研究了在温差变大时向超临
界对流模式转化过程. 实验结果表明，界面张力对各种对流模式的形成和转变具有重要的作
用.
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| 关 键 词： | 高原冻土 输电线路 冻土特性 影响因素 |
| 收稿时间： | 2008-01-16 |
| 修稿时间： | 2008-06-17 |
THE INFLUENCE FACTOR ANALYSIS FOR SITE SELECT OF TRANSMISSION LINE IN FROZEN EARTH AREA |
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| CHENG Dongxing|ZHANG Jiangming|LIU Houjian YU Qihao LIU Zhiwei.THE INFLUENCE FACTOR ANALYSIS FOR SITE SELECT OF TRANSMISSION LINE IN FROZEN EARTH AREA[J].chinese journal of theoretical and applied mechanics,2009,17(3):329-334. |
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| Authors: | CHENG Dongxing|ZHANG Jiangming|LIU Houjian YU Qihao LIU Zhiwei |
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| Institution: | Northwest Electric Power Design Institute of China Power Engineering Consulting Group, Xi′an 710032
Cold and Arid Regions Environmental and Engineering Research Institute, CAS, Lanzhou 730000 |
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| Abstract: | he ±500kV Direct Transmission Line is across the entire Qinghai-Tibet plateau. So its environment has a tight link with frozen soils. Because of freezing soil specialty of frost-heaving and thaw-settlement, the transmission line would meet the great challenge in survey, design, construction and operation in post-construction stage. Therefore, in order to learn more about permafrost engineering problems of transmission line, the physical and mechanical tests are conducted. This paper analyzes the influence factors on the tower stability. The test results show that freezing and thawing behavior can increase the sensitivity as the water content increases for the same soil samples. If the water content keeps the same, the freezing and thawing behavior increases the sensitivity as the particle size decreases for different soil samples. Also, the results show that the geological environment, harmful features of frozen ground, different geomorphic units, thermal stability characteristics of permafrost, and the convenient construction are the factors influencing the tower foundation stability. |
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| Keywords: | Plateau permafrost Transmission line Property of frozen soil Ttower foundation Stability Qinghai Tibet |
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