| 桩网支承路基力学性能数值分析 |
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| 引用本文： | 蔡德钩,叶阳升,闫宏业,张千里,何华武.桩网支承路基力学性能数值分析[J].中国铁道科学,2010,31(3). |
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| 作者姓名： | 蔡德钩 叶阳升 闫宏业 张千里 何华武 |
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| 作者单位： | 1. 中国铁道科学研究院铁道建筑研究所,北京,100081;中国铁道科学研究院,高速铁路轨道技术国家重点实验室,北京,100081
2. 铁道部,北京,100844 |
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| 基金项目： | 铁道部科技研究开发计划项目 |
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| 摘 要： | 运用ABAQUS有限元软件建立桩网支承路基三维模型,分析桩间距、桩帽尺寸、软土层模量、下卧层模量和格栅模量等关键参数对桩网支承路基沉降、桩土应力、垫层上方应力、加筋网垫承担的应力、桩土荷载和格栅拉力等的影响。结果表明,桩土差异沉降受软土层模量影响最大,路基存在明显的应力集中即"土拱"效应,加筋网垫承担的竖向应力随下卧层模量、软土层模量和置换率的增大而减小,随格栅模量的增大而增大,两桩帽间格栅竖向变形近似呈悬索形状,上层格栅受到的拉力约为下层的0.4倍。
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| 关 键 词： | 路基 桩网支承路基 桩 格栅 力学性能 |
Numerical Analysis on the Mechanical Properties of Geosynthetic Reinforced and Pile Supported Embankment |
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| CAI Degou,YE Yangsheng,YAN Hongye,ZHANG Qianli,HE Huawu.Numerical Analysis on the Mechanical Properties of Geosynthetic Reinforced and Pile Supported Embankment[J].China Railway Science,2010,31(3). |
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| Authors: | CAI Degou YE Yangsheng YAN Hongye ZHANG Qianli HE Huawu |
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| Institution: | CAI Degou1,2,YE Yangsheng1,YAN Hongye1,ZHANG Qianli1,HE Huawu3(1.Railway Engineering Research Institute,China Academy of Railway Sciences,Beijing 100081,China,2.State Key Laboratory of Track Technology of High-Speed Railway,3.Ministry of Railways,Beijing 100844,China) |
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| Abstract: | The three-dimensional model of geosynthetic reinforced and pile supported(GRPS) embankment was established by ABAQUS finite element software.The impact of the key parameters,such as the pile spacing,the size of pile cap,the modulus of soft soil,the modulus of sublayer and the geogrid,on the GRPS settlement,the pile-soil stress,the stress above the bedding,the stress of the reinforced bedding,the pile-soil loads and geosynthetic tension were simulated and analyzed.The results show that the modulus of the sof... |
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| Keywords: | Subgrade Geosynthetic reinforced and pile supported embankment Pile Grid Mechanical property |
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