漕宝路工程立交改造涉铁桥梁特点分析

Analysis on Characteristics of Railway Bridges in Interchange Reconstruction of Caobao Road Project

上海市漕宝路快速路新建工程涉及对现状嘉闵立交的改造,主要介绍了嘉闵立交的改造方案,重点介绍了跨铁路廊道主桥工程的控制因素、设计特点及项目重难点。工程范围内的涉铁主桥采用异型连续钢箱梁T形刚构桥转体施工跨越高速铁路、普通铁路共7条铁路线路。漕宝路跨铁路主桥宽度非常宽、平面尺寸变化大、断面布置异形,桥梁纵坡达到6%。异形的结构布置带来了纵向、横向极不平衡转体的问题,通过精确配重、临时斜拉索辅助结构受力等措施,解决大跨度桥梁极不平衡转体的难点,可为类似工程提供参考。

The new project of Caobao Road Expressway in Shanghai involves the reconstruction of the current Jiamin Interchange.The reconstruction scheme of Jiamin Interchange is mainly introduced.The control factors,design characteristics,key and difficult points of the main bridge project across the railway corridor are specially introduced.The railway bridges in the engineering range are the special-shaped continuous steel box girder T-shaped rigid-frame bridges by the rotation construction method to span 7 lines of high-speed railway and ordinary railway.The main bridge across the railway has the very wide width,large changes in plane size,special-shaped section layout,and the longitudinal slope of the bridge reaches 6%.The special-shaped structural layout brings the problem of vertical and horizontal extremely unbalanced rotation.The difficulty of extremely unbalanced rotation of long-span bridges can be solved through the accurate counterweight,the temporary stay cable auxiliary structure and other measures,which can provide reference for the similar projects.