| 兰新高速铁路路基上拱原因分析及整治措施 |
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| 引用本文： | 王剑.兰新高速铁路路基上拱原因分析及整治措施[J].路基工程,2015,0(1):205-209. |
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| 作者姓名： | 王剑 |
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| 作者单位： | 中铁十二局集团第二工程有限公司, 太原 030012 |
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| 摘 要： | 高速铁路对路基工程工后轨面高程控制十分严格。兰州—新疆高速铁路设计标准为时速200~250 km,全线为无砟轨道,轨检小车以CPⅢ控制网复测成果进行一段无砟轨道精调前的数据采集,采集数据过程中发现轨顶高程超标,均高于设计高程,因此对该上胀路基段进行原因分析,并提出相应的整治工程措施。结果表明:泥岩遇水膨胀是路基轨面上胀的主要原因,且截排水措施实施后,路基轨面上胀趋势明显减缓,路基基本处于稳定状态,可为西北干旱地区高速铁路路基上拱防治提供参考。
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| 关 键 词： | 高速铁路 路基上拱 变形 原因分析 整治措施 |
| 收稿时间： | 2019-11-06 |
Cause Analysis on Subgrade Arching of Lanzhou-Xinjiang High-speed Railway and the Control Measures |
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| Abstract: | For high-speed railway, the post-construction elevation of rail surface is controlled strictly in subgrade engineering. Lanzhou-Xinjiang High-speed Railway has the design speed of 200～250 km on ballastless track. Before the fine adjustment thereof, track inspection car was used for data acquisition with regard to the retest results of the CPⅢ control network, during which it was found that the elevation of rail top was out of limit and larger than the design value; thus cause analysis was made in relation to this rising section with corresponded control measures proposed. The result shows that expansion of mudstone when water goes in is the main reason leading to rail surface rise and, after implementation of water interception and drainage measures, the rise tendency of rail surface slows down obviously and the subgrade is in the stable state substantially, which may be the reference to subgrade arching prevention in arid areas in the northwest. |
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