摘要
Abstract
Through the analysis on multiple techniques for down deformation repair of main girder of bridge crane, in combination with the site actual working condition and specified project duration, the paper proposes 1 + 2 rapid repair technique for main girder, i.e., on the basis of the main girder repair technique with pre-stress tensioner, adds tensioner connecting plate and dedicated lifting working platform.The technique shortens the repair duration of the main girder, only 22 h are needed, solves the state that due to the effect of the tensioning force during the traditional tensioning, concentrated stress and deformation is generated at the place where the lower flange plate of the main girder connects the tensioner, and improves the strength and rigidity of the main girder as well as the stability of the web plate.关键词
桥式起重机/预应力张拉器/主梁/下挠/修复/张拉力分类
机械制造
