| 沥青路面下多年冻土上限变化计算的探讨 |
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| 引用本文： | 米海珍,吴青柏,马治学.沥青路面下多年冻土上限变化计算的探讨[J].冰川冻土,1998(2). |
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| 作者姓名： | 米海珍 吴青柏 马治学 |
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| 作者单位： | 中国科学院兰州冰川冻土研究所 |
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| 摘 要： | 以相变热传导理论为基础，利用实测路面温度资料计算了多年冻土路基中冻土上限的变化趋势，认为上限的稳定是一个时间相当长的过程．人为上限在目前条件下仍在下降，从现在的１２ｃｍ／ａ下降至５０ａ后的５ｃｍ／ａ，届时上限深度将达到９４ｍ（从路面起计算）．
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| 关 键 词： | 冻土上限 路基 相变热传导 |
The Calculation Depth of the Permafrost Table under Asphalt Pavement |
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| MI Hai-Zhen,WU Qing-Bai,MA Zhi-Xue.The Calculation Depth of the Permafrost Table under Asphalt Pavement[J].Journal of Glaciology and Geocryology,1998(2). |
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| Authors: | MI Hai-Zhen WU Qing-Bai MA Zhi-Xue |
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| Abstract: | The change of the permafrost table under asphalt parement is calculated based on heat transfer with phase change using the observation data. It is found that even if a highway has been built for more than ten years, the table is still changing. The thaw velocity changes from 12 cm/a at present to 5 cm/a after 50 years. Finally the permafrost table depth will be 9 4 meters. The permafrost table will take a long period to approximate its stability. |
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| Keywords: | permafrost table roadbed heat transfer with phase change |
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