高速公路拼宽桥梁设计对桥梁整体受力性能与不均匀沉降的影响

The Influence of Expressway Widening Bridge Design on the Overall Mechanical Performance and Uneven Settlement of the Bridge

在高速公路桥梁维修中,桥梁拼宽是较为有用且常见的处理方式。为提升高速公路拼宽桥梁设计水平,文章研究拼宽桥梁设计对桥梁整体性能的影响,首先分析了不同桥梁拼宽方式和工艺的具体特点,然后依托某高速公路上跨径20 m简支空心板桥拼宽项目,通过软件Midas Civil构建多个计算模型,研究了刚度比、拼宽宽度对桥梁上部结构整体受力性能的影响,最后探讨了新建桩基对拼宽桥梁不均匀沉降的影响,以供参考。

In the expressway bridge maintenance,bridge widening is a useful and common treatment method.In order to improve the design level of the expressway widening bridge,this paper studies the influence of widening bridge design on the overall performance of the bridge.Firstly,the specific characteristics of different bridge widening methods and processes are analyzed.Then,based on the widening project of a simply supported hollow slab bridge with a span of 20 m on an expressway,multiple calculation models are constructed by software Midas Civil to study the influence of stiffness ratio and widening width on the overall mechanical performance of the superstructure of the bridge.Finally,the influence of new pile foundation on the uneven settlement of widening bridge is discussed for reference.