Research on Construction Method of Bracket of Three-direction Prestressed Box Girder Continuous Rigid Frame Bridge
By analyzing the construction method of the bracket of 0#beam section and the construction method of the bracket of the straight line section of the side span,the installation and dismantling of the bracket and the preloading method are analyzed emphatical-ly.At the same time,the design load and combination of the bracket are calculated and the preloading process and the arrangement of measuring points are described in detail.The results show that the preloading of brackets can achieve the following three purposes:(1)Eliminate the inelastic deformation between brackets;(2)Measure the elastic deformation value of the bracket as the basis of construc-tion reserved camber;(3)Settlement is measured to ensure the line type and elevation of the 0#beam segment,providing empirical data for the same type of bridge construction.
万方数据
维普
