| 高等级公路桥头跳车原理分析与预防措施 |
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| 引用本文： | 刘秀,冯德成,曹一翔.高等级公路桥头跳车原理分析与预防措施[J].森林工程,2014(6):94-97. |
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| 作者姓名： | 刘秀 冯德成 曹一翔 |
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| 作者单位： | 哈尔滨工业大学交通科学与工程学院,哈尔滨150090 |
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| 基金项目： | 高等学校博士学科点专项科研基金项目（20092302110053） |
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| 摘 要： | 随着公路交通事业的迅速发展,桥头跳车问题已经成为高速公路和城市道路的常见病害之一,严重地影响行车的舒适性和安全性.引起桥头跳车的主要原因有不均均匀沉降,刚度突变和车速与车辆本身的抗振性能.就高等级公路而言,主要是柔性道路与刚性结构物之间的连接处发生错台,导致行车时发生桥头跳车现象.在车辆荷载、结构自重和自然因素作用下,桥梁与道路同时发生沉降,但两者的沉降量有很大差异,道路的沉降量远大于桥梁的沉降量,形成发生桥头跳车的错台.如何有效地控制桥头跳车,保证高速公路运营的安全性和舒适性已越来越引起人们的重视.从工程实践中出发,首先分析高等级公路桥头跳车的原因,然后从台背地基的处理、台背路基的填筑、设置道路与桥梁过渡措施等几个方面提出避免桥头跳车的预防措施,其结论可供道路工程设计施工参考.
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| 关 键 词： | 公路 桥头跳车 原因分析 预防措施 |
The Reason Analysis and Preventive Measures of Bridgehead Jump in High Grade Highway |
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| Liu Xiu,Feng Decheng＊,Cao Yixiang.The Reason Analysis and Preventive Measures of Bridgehead Jump in High Grade Highway[J].Forest Engineering,2014(6):94-97. |
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| Authors: | Liu Xiu Feng Decheng＊ Cao Yixiang |
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| Institution: | (School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090) |
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| Abstract: | Bump at the end of the bridge has been one of the major distresses for both highway and urban roads, which affects the driving convenience and safety seriously. The causes of the bump problem include the non-uniform settlement of the foundation, stiff- ness mutation, velocity, and resistance of the vehicles to shock. With regard to the expressway, bump usually happens as the faulting at the connection between the flexible pavement and the bridge. Under the acting force of vehicle load, structure weight, and natural factors, the settlement occurs simultaneously for the bridge and the road, however, the settlements were different. The settlement of the road is larger compared to that of the bridge, therefore the faulting formed. How to effectively prevent bump problems at the end of bridges and ensure the safety and convenience of the expressway has attracted more and more concerns. Firstly, the causes of the bump problem were investigated in this paper. Secondly, some measures on the filling and treatment of the subgrade of the abutment and setting up transition zone between the bridge and the highway were proposed to prevent the bump problem. The findings in this pa- per can provide some reference to the design and construction of highway engineering. |
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| Keywords: | Highway bridgehead jump reason analysis preventive measures |
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