| 新建铁路下穿既有公路桥梁的桩基U型结构路堤设计研究 |
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| 引用本文： | 张磊.新建铁路下穿既有公路桥梁的桩基U型结构路堤设计研究[J].路基工程,2015,0(1):133-135. |
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| 作者姓名： | 张磊 |
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| 作者单位： | 铁道第三勘察设计院集团有限公司, 天津 300251 |
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| 摘 要： | 新建铁路以路堤形式下穿既有高速公路桥梁,路基基底压缩层较厚。在全面分析路基结构受力的基础上,经方案比较,采用桩基U型结构路堤形式通过,既避免路基放坡占压高速公路桥墩;又利用U型结构将整个路基填筑体托起,消除路基填筑对桥下压缩土层产生的附加荷载,避免对高速公路桥梁桩基产生负摩阻力,从而保证高速公路桥梁结构的安全。
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| 关 键 词： | 客货共线铁路 桩基U型结构路堤 下穿公路桥梁 负摩阻力 结构设计 |
| 收稿时间： | 2019-11-12 |
On U-shaped Pile-raft Embankment Used in Railway Under-crossing Existing Highway Bridge |
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| Abstract: | When a railway passes under an existing highway bridge in the form of embankment, the compression layer under subgrade is relatively thick. The U-shaped pile-raft embankment is adopted after scheme comparison based on full analysis of subgrade structure to avoid occupying the bridge pier of due to subgrade sloping, and the entire filled embankment is held up by the U-shaped structure to eliminate the additional load caused by the filled embankment on the compressed soil layer underneath the bridge, and prevent negative friction on the pile foundation, which ensure the safety of bridge structures. |
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