客运专线大跨度连续梁-拱桥先梁后拱施工关键技术研究

Construction Technology of Erecting Girder First and Arch Late for Large-span Continuous Girder-arch Bridge in Passenger Dedicated Line

连续梁—拱组合桥梁是桥梁中的重要类型,一般采用"先梁后拱"的施工顺序。本文结合成渝客专资阳沱江特大桥阐述其施工操作要点及关键技术,即挂篮变形技术、支架搭设与钢管拱拼装技术、吊杆索力优化技术。该桥的成功建造为类似桥型施工提供了经验和方法。

Continuous beam-arch composite bridge is an important type of bridges, the method of erecting girder first and arch late is generally used for the construction sequence. In this paper, combined with the Ziyang Tuojiang Bridge of Chengdu-Chongqing High-speed Railway, the key technology and the construction operation points were introduced, name- ly, banging basket deformation technology, bracket erection and steel tube arch assembly technology, and cable force opti- mization technology of hanger. The success construction of the bridge could provide both experience and method for the sim- ilar bridge construction.