| 无砟轨道路基面支承刚度理论计算及应用 |
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| 引用本文： | 徐鹏,蔡成标.无砟轨道路基面支承刚度理论计算及应用[J].中国铁道科学,2010,31(1). |
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| 作者姓名： | 徐鹏 蔡成标 |
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| 作者单位： | 西南交通大学牵引动力国家重点实验室,四川成都,610031 |
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| 基金项目： | 国家科技支撑计划项目，国家"九七三"计划项目，全国博士学位论文作者专项资金资助项目 |
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| 摘 要： | 将无砟轨道路基结构简化成双层弹性体系,基于层状弹性体系力学理论,给出无砟轨道路基面支承刚度的计算方法。应用该方法进行遂渝线无砟轨道试验段路基面刚度计算,并与现场加载试验测试结果进行比较,两者吻合较好,验证了该方法的可行性。以桥梁路基过渡段为例,将此计算方法应用于无砟轨道典型过渡段的动力性能评估中,进行动力计算。结果表明,该桥梁路基过渡段的钢轨挠度变化率小于0.3 mm.m-1的限值,满足行车要求。运用该计算方法对无砟轨道基床表层及底层变形模量Ev2的合理取值进行研究,结果表明:改变基床表层变形模量对路基面支承刚度影响不大,而改变基床底层变形模量对路基面支承刚度的影响明显;将变形模量Ev2作为压实标准时,对于基床表层和底层,Ev2可分别取为120～260和80～140 MPa。
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| 关 键 词： | 无砟轨道 路基面支承刚度 计算方法 变形模量E_(v2) |
Theoretical Calculation of the Supporting Stiffness of the Subgrade Surface in Ballastless Track and Its Application |
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| XU Peng,CAI Chengbiao.Theoretical Calculation of the Supporting Stiffness of the Subgrade Surface in Ballastless Track and Its Application[J].China Railway Science,2010,31(1). |
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| Authors: | XU Peng CAI Chengbiao |
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| Affiliation: | XU Peng,CAI Chengbiao(Traction Power State Key Laboratory,Southwest Jiaotong University,Chengdu Sichuan 610031,China) |
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| Abstract: | The subgrade structure of ballastless track was simplified to an elastic two-layer system and the calculation method of the supporting stiffness of the subgrade surface in ballastless track was given based on the mechanical theory in elastic layered system.The method was used to calculate the supporting stiffness of the subgrade surface in the ballastless track test section of SuiningChongqing Railway line.The method was validated to be feasible by comparing the calculation results with those of the on site... |
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| Keywords: | Ballastless track Supporting stiffness of subgrade surface Calculation method Deformation modulus E_(v2) |
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