Research on Key Technology of Steel Box Girder Construction Based on Measured Temperature Mode

Abstract

The temperature effect has a great impact on the reasonable completion state of the steel box girder. The relevant research has an important role in promoting the design, construction and operation and maintenance of the steel box girder. Firstly, the effects of uniform temperature difference and gradient temperature difference are analyzed, and three gradient temperature difference modes are compared; Based on the construction monitoring project of a continuous steel box girder, the longitudinal bridge displacement of the support under different uniform temperature difference conditions is calculated. The results show that the overall displacement and relative displacement are considered in the pre deflection of the support; The beam end angle under three different gradient temperature difference modes is compared, and the calculation formula of the top and bottom plate cutting caused by the beam end angle is proposed. This paper systematically studies the influence of uniform temperature difference and gradient temperature difference on the positioning of steel box girder support and the closure of weld seam, and puts forward countermeasures, which will provide some theory and engineering experience for similar projects in the future.