Research on Manufacturing and Construction Technology of 50m Steel Box Girder

Abstract

In the construction of 50m steel box girder of Chengdu Tianfu Airport Expressway, in order to overcome the difficulty of making long steel box girder, China Tieshan Bridge first manufactured the plate unit in the Chengdu base factory, and then assembled the beam section, and transported the large piece for 28km. The steel beam in this project is an I-shaped structure, and each beam section is composed of a bottom plate, a web plate, a top plate, a horizontal connection and a cantilever arm. In the manufacture of beam sections, the actual assembly of each bridge steel plate girder is that each section is pre-assembled on the same tire mold frame, and the assembly iscarried out in sequence from the middle to the two sides, and the size error is controlled by the form of temporary matching between the blocks. And the overall linearity, to ensure the quality.