大跨宽幅四线高速铁路混凝土部分斜拉桥设计研究

Design and Research on Large-Span Wide Concrete Partial Cable-Stayed Bridges of Four Line High Speed Railway

预应力混凝土桥梁因良好的技术经济性能优势,在高速铁路桥梁中得到了广泛的应用。以赣州至深圳高速铁路剑潭东江特大桥(136+260+136)m四线高速铁路预应力混凝土部分斜拉桥为工程背景,研究了大跨度宽幅主梁部分斜拉桥的桥式方案、关键构造、结构受力、桥梁变形以及施工方法等关键技术,尤其是针对大跨宽幅混凝土主梁铺设无砟轨道带来的一系列竖向变形、扭曲变形以及横向变形问题,提出了解决思路和措施。可为大跨度高速铁路预应力混凝土部分斜拉桥的设计建造提供参考。

Prestressed concrete bridges have been widely used in high-speed railway bridges due to its good technical and economical performance advantages.Taking Jiantan Dongjiang super large bridge(136+260+136)m four-track prestressed concrete partial cable-stayed bridge of Ganzhou-Shenzhen High-speed Railway as an example,the key construction technologies such as the bridge scheme,key structure,structural force,bridge deformation and construction methods of the long-span wide concrete main girder partial cable-stayed bridge are studied.In view of the vertical deformation,twisting deformation and lateral deformation caused by the laying of ballastless tracks on large-span wide concrete main girder,the solutions and design measures are proposed.It can provide reference for the construction of prestressed concrete partial cable-stayed bridges of large-span high-speed railways.