低净空下桥梁方案设计分析

Analysis on the Design of Bridge Scheme under Low Clearance

文章以杨高中路改建工程的新建跨线桥项目为背景,论述了杨高中路复杂的建设条件,以及杨高中路全线与轨道交通9号线并线、桥面标高低、大门架多等特点。通过对不同的桥梁上部结构形式进行比选,结合建设条件,选择适用于低桥面标高、大门架情况下的合适梁型,再通过对桥梁跨径、外观造型进行比选,全方位分析了低桥面标高下桥梁的方案设计,供类似工程设计参考。

Based on the newly-builtfly-over bridge project of Yanggao Middle Road reconstruction engineering,this paper discusses the complex construction conditions of Yanggao Middle Road,as well as the characteristics of the whole Yanggao Middle Road merging with the rail transit line 9,low bridge deck elevation,and multiple large portal frames.Through the comparison and selection of different bridge superstructure forms,combined with the construction conditions,the appropriate beam type suitable for low bridge deck elevation and large portal frame is selected.Then,through the comparison and selection of bridge span and appearance,the scheme design of bridge under low bridge deck elevation is analyzed in an all-round way,which can be used as a reference for similar engineering design.