| 路基宽度对多年冻土区站场路基温度场的影响 |
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| 引用本文： | 沈宇鹏,许兆义,王连俊,魏庆朝.路基宽度对多年冻土区站场路基温度场的影响[J].北京交通大学学报(自然科学版),2008,32(1):20-23. |
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| 作者姓名： | 沈宇鹏 许兆义 王连俊 魏庆朝 |
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| 作者单位： | 北京交通大学土木建筑工程学院 北京100044 |
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| 基金项目： | 铁道部科研项目
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北京交通大学校科研和教改项目 |
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| 摘 要： | 青藏铁路路基的热稳定性受到气温升高的影响.站场路堤比普通路堤宽度大,受气温升高影响更大.以清水河站场试验点为工程背景,对站场和普通路基3个冻融周期的现场测试温度进行分析比较.参照前人对气温预测计算公式,作为青藏铁路站场路基进行热分析的边界条件,运用数值计算方法近似求解计算站场路基20 a后的热状况,同时与普通宽度的路基作比较.结果表明,站场路堤的多年冻土的人为上限比普通路堤高,最大融深比普通路堤大,说明路基的宽度是加速冻土破坏的一个重要影响因素.
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| 关 键 词： | 青藏铁路 站场路基 人为上限 数值模拟 |
| 文章编号： | 1673-0291（2008）01-0020-04 |
| 收稿时间： | 2006-07-25 |
| 修稿时间： | 2007-10-25 |
Influence of the Width of Station Embankment on Temperature Field in Permafrost Area |
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| SHEN Yupeng,XU Zhaoyi,WANG Lianjun,WEI Qingchao.Influence of the Width of Station Embankment on Temperature Field in Permafrost Area[J].JOURNAL OF BEIJING JIAOTONG UNIVERSITY,2008,32(1):20-23. |
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| Authors: | SHEN Yupeng XU Zhaoyi WANG Lianjun WEI Qingchao |
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| Abstract: | The heat stability would be destroyed by the gradual rising temperature of Qinghai-Tibet plateau.Since the width of railway station is wider than that of others,the influence resulting from the climate is also more severe.The field information of railway station and others' from the test site in Qingshuihe in Qinghai province is analyzed and compared within three cycles in this paper.The thermal situation after 20 years' time is simulated approximately when considering air temperature as the boundary condition in Qinghai-Tibet railway,and the width of station is also compared with that of common railway.The results show that permafrost table of this station is higher than the common's,that is to say,the width of embankment is a factor of accelerating destruction in permafrost area. |
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| Keywords: | Qinghai-Tibet railway embankment of station permafrost table numerical simulation |
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