平申线叶新公路泖港大桥改建总体设计

Overall Design for Reconstruction of MaogangBridge on YexinHighway of Pingshen Line

现状泖港大桥因航道升级、道路拓宽、桥梁更新需要改建。结合工程背景、建设条件,对老桥顶升保留和拆除重建的总体方案进行比选后,推荐采用拆除重建。介绍工程总体设计方案,总结单索面宽幅斜拉桥体系、塔梁固结斜拉桥支座体系、UHPC+钢组合桥面板、钢梁挑臂后拼工艺、大跨径混凝土斜拉桥拆除等关键技术,可为类似桥梁工程建设提供参考。

The current Maogang Bridge needs to be rebuilt due to channel upgrading,road widening&bridge renewal.In combination with the project background&construction conditions,after comparing&selecting the overall schemes of the old bridge jacking retention,demolition&reconstruction,it is recommended to adopt demo lition&reconstruction.The overall design scheme of the project is introduced,and the key technologies such as single cable plane wide cable-stayed bridge system,tower beam consolidation cable-stayed bridge support system,UHPC+steel composite bridge deck,steel beam cantilever post-prefabricated process,and large-span concrete cable-stayed bridge demolition are summarized,which can provide reference for similar bridge construction.