空间缆索体系张弦梁钢构桥施工技术研究与应用

厦门健康步道景观提升工程节点六桥梁,采用张弦梁和悬索梁桥组成的混合体系结构,由加劲钢箱梁作为上弦,下部设置两根平行的密闭高钒索,中间连以撑杆、吊缆,形成整体受力自平衡体系。节点六桥梁结构新颖,跨越仙岳路交通主干道,交通组织压力大;撑杆及缆索为空间结构,定位困难,安装精度要求高,施工难度大。采用"先桥后缆"的施工方法,先安装钢箱梁,再进行撑杆、密闭高钒索、不锈钢吊索安装,最后进行体系转换,形成独具特色的施工技术,为今后类似桥梁施工了提供借鉴。

Research and Application of Construction Technology of Steel Structure Bridge with Beam String and Spatial Cable System

The bridge at node six of the Xiamen Footpath Landscape Promotion Project adopts a hybrid system structure composed of a beam string and a suspension beam bridge,the stiffened steel box girder being the upper chord,two parallel closed high vanadium cables being set at the lower part,and a whole force self-balance systesm is formed by connecting the bracing rod and suspension cable in the middle.The structure of node six bridge is novel,crossing the main traffic road of Xianyue Road,and the traffic organization faces great challenge;the strut and cable are spatial structures,which are difficult to be positioned,requiring high installation accuracy thus facing great difficulty in construction.This bridge adopts the construction method of"bridge first,then cable".The steel box girder is first installed,then the stay bar,closed high vanadium cable and stainless steel sling are installed,and finally the system is transformed to form a unique construction technology,so as to provide reference for similar bridge construction in the future.