| 高速铁路高路堤压缩变形特性分析及压实标准探讨 |
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| 引用本文： | 宣立华,张良.高速铁路高路堤压缩变形特性分析及压实标准探讨[J].路基工程,2014,0(3):79-84. |
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| 作者姓名： | 宣立华 张良 |
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| 作者单位： | 1.中铁工程设计咨询集团有限公司, 北京 100055 |
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| 基金项目： | “973计划”课题:高速铁路路基长期累积变形及服役性能演变（2013CB036204）；铁道部科技研究开发计划:无砟轨道路基沉降控制系统技术深化研究（2010G03-F-1） |
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| 摘 要： | 为探讨适应高速铁路沉降变形要求的路堤压实标准，采用专用有限元软件模拟了路堤的分层填筑，分析了自重作用下的路堤压缩变形特性，选择在建无砟轨道高速铁路典型高路堤工点，测试了路堤不同部位的局部压缩沉降及压实状态，并进行了数据分析。结果表明:路堤自重作用下的垂向应力及垂向应变基本呈线性分布；自重荷载作用下的屈服区域将最先出现在路堤中下部；试验工点压实标准按规范提高一级后，路堤工后压缩沉降仍有时间效应；填高6~12m无砟轨道路基基床以下路堤的压实标准，建议压实系数K取0.95，地基系数K
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| 关 键 词： | 高速铁路 无砟轨道 高路堤 压缩变形 压实标准 |
| 收稿时间： | 2019-11-12 |
Analysis on Compressive Deformation of High Embankment along High-speed Railway and Discussion of Compaction Criteria |
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| Abstract: | In order to discuss embankment compaction criteria adaptable to settlement of high-speed railway, the filling in layers for embankment was simulated with special FEM software, by which the compressive deformation features of the embankment under the action of self weight was analyzed by selecting the test points on typical high embankment of ballastless track high-speed railway under construction, and testing the local compressive settlement and compactness at these points with data analysis. The results show that the vertical stress and strain in the embankment under self weight substantially present linear distribution; the yield zone under self-weight load will firstly appear in the lower part of the embankment; the post-construction compressive settlement of the embankment has time effect though the compaction criteria at the test points have been improved by one level according to the specification; thus it is recommended that the compaction criteria, which are for the embankment filled 6~12m high below the subgrade bed for ballastless track, are as follows: compaction coefficient K: 0.95; foundation coefficient K30:150 MPa/m. |
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