关键词: 悬索桥, 钢箱梁, 工地焊接, 钢箱梁总长度, 桥梁中轴线, 线形控制

Abstract: There are two key factors during the site welding of the long-span suspension bridge. One is how to control the length; the other is how to control the center line of the steel box girder. They can be controlled effectively by the width of the weld which is the key parameter during the side welding. Based on the welding test, the length of the steel box girder can be adjusted by adjusting the width of the weld in the different stage. The longitudinal axis of the steel box girder can be controlled by setting the width of the weld or controlling the contraction of the weld to make the steel box deflection and come to the axis of the bridge.

Key words: suspension bridge , steel box girder , site welding , length of the steel box , axis of the bridge , alignment control ;