犍为岷江特大桥主跨458 m钢管混凝土拱桥施工关键技术

Key Techniques for Construction of 458 m-span Concrete-filled Steel Tube Arch Bridge of Qianwei Minjiang River Bridge

G4216仁寿经沐川至屏山新市高速公路控制性工程犍为岷江特大桥主桥采用主跨458 m中承式钢管混凝土拱桥。主桥由主拱圈、桥面梁和附属结构三部分组成。主要介绍该桥的总体制造思路、制造关键重难点及解决思路、大节段整体运输重难点及解决思路、现场安装重难点及解决思路。

The main bridge of Qianwei Minjiang River Bridge in G4216 Renshou from Muchuan to Pingshan New City Expressway Control Project is a 458 m-span half-through concrete-filled steel tube arch bridge.The main bridge is composed of three parts of main arch ring,bridge deck beam and auxiliary structure.The overall manufacturing ideas,key manufacturing difficulties and solutions,large segmental overall transportation difficulties and solutions,and field installation difficulties and solutions of this bridge are mainly introduced.