立交改造设计中桥梁拼接设计案例分析

Analysis of Bridge Splicing Design in Overpass Reconstruction Design

摘要:

随着城市交通的发展，对已有桥梁结构的拼宽改造在近年来的工程建设中逐渐增多。如何对特殊桥梁及在设计受限条件下快速、安全地进行桥梁拼宽，成为桥梁设计又一关注重点。以实际工程为背景进行研究，探讨在立交改造中因条件受限，需对航道桥进行改造拼接的设计思路。对新老桥梁拼接设计中的关键问题，如老桥服役状态分析、拼宽桥的结构形式选取、新老桥拼接挠度协调及桥面拼缝细节处理等进行分析和探讨，对今后特殊桥梁拼宽设计具有参考意义。

Abstract:

With the development of urban transportation, the widening reconstruction of the existing bridge structures has gradually increased in recent years in engineering construction. How to quickly and safely widen the special bridges under the design constraints has become another focus of bridge design. Based on the practical engineering, the design concept of reconstruction and splicing of channel bridges in overpass reconstruction due to limited conditions are studied and discussed. The key issues in the splicing design of new and old bridges, such as the analysis of the service status of the old bridge, the selection of the structural form of the widened bridge, the coordination of the splicing deflection of the new and old bridges, and the detailed treatment of the bridge deck joints are analyzed and discussed, which have reference significance for the widening design of special bridges in the future.