新通扬运河大桥主桥改造设计

Reconstruction Design of the Main Bridge of the New Tongyang Canal Bridge

新通扬运河大桥主桥改造设计将原桥上部80 m跨钢管混凝土系杆拱拆除,利用其下部结构进行改造,新建80 m跨简支双层钢桁梁,上层布置为8车道城市快速路,下层人行道及非机动车道布置在主桁外侧,内侧为双向六车道公路。设计方案采用双层桥梁的形式,以立面空间换取平面空间,可节约用地、减少拆迁、降低造价。该改造工程的成功实施为老桥改造提供了一条新途径,可为类似改造项目提供借鉴。

The reconstruction design of the main bridge of the New Tongyang Canal Bridge will demolish the 80 m span steel pipe concrete tied arch of the original bridge,and use its lower structure to construct a new 80 m span simply supported double layer steel truss beam.The upper layer is arranged as an 8-lane urban expressway,and the lower layer sidewalks and non motorized vehicle lanes are arranged on the outer side of the main truss,while the inner side is a two-way 6-lane highway.The design scheme adopts the form of a double-layer bridge,exchanging facade space for plane space,which can save land,reduce demolition,and reduce costs.The successful implementation of this renovation project provides a new approach for the renovation of old bridges and can provide reference for similar renovation projects.