期刊论文

中文

世界桥梁

1671-7767

2019

47

4

6-11

10.3969/j.issn.1671-7767.2019.04.002

本校为第一机构

虎门二桥坭洲水道桥为主跨1688 m的不对称双塔双跨钢箱梁悬索桥.针对近塔区无吊索钢箱梁段的临时支承及线形调节需要,设计了"挑梁支架+临时吊索"的临时支承体系.挑梁支架布置于桥塔下横梁顶部,单幅主梁由2根12 m长的3 H M 588型钢组成,主梁上布置分配梁和轨道梁.挑梁支架临时支承钢箱梁段,并可通过钢滑靴的高度和坡度以及三向千斤顶调整梁段线形.临时吊索由临时索夹、骑跨钢丝绳、螺杆扁担梁、可调节螺杆、连接件组成,既可悬吊支承钢箱梁,又可调节钢箱梁前端标高.全桥钢箱梁段吊装完成后、梁段间环焊施工前,采用临时吊索和布置于挑梁支架上的三向千斤顶调整无吊索梁段的线形及平面位置,环焊使其...

The Nizhou Waterway Bridge of the Second Humen Bridge is an asymmetrical two-span suspension bridge with a main span of 1 688 m. The bridge has two towers and the stiffening girder adopts the steel box structure. A temporary supporting system formed of cantilever supporting frames and temporary hangers was developed to carry the steel box girder sections with no hangers near the towers and facilitate the geometry adjustment. The cantilever supporting frames were placed beneath the lower cross beams of the towers. A single cantilever supporting frame consists of two 3HM588 section steels each 1...