Discussion on manufacturing technology of steel box girder of cross-line bridge engineering in Xiamen Hele road

Abstract

Taking cross-line bridge road engineering of Jimei district Hele road (Jinting north road -Jimei north road section) of Xiamen city as the background, the paper introduces the overall segmentation and hoisting sequence scheme of steel box girder, the division of plate element, the setting method of jig-frame, the production process of steel box girder, the beam section of steel box girder and the overall welding process. And then it analyzes the geometric dimension accuracy control of element, the penetration control of U-rib weld on the plate element and the quality control features of diaphragm plate, solves the preassembly line shape of steel box girder and the precision of the interface matching connection and other difficult manufacturing problems. It ensures the smooth progress of the project, and provides a reference for manufacture of the steel box girder of similar projects.