Abstract：
Taking the B beam of Chishi Bridge as an example, the engineering characteristics, bracket design, bearing force calculation and settlement control are introduced. The top of the B beam is connected to the main beam. In order to accurately control the elevation of the B beam and the settlement of the beam bracket to ensure the safety of the large-scale high-altitude support, the combination of software theory calculation and local pre-compression is adopted. At the same time, the D beam bracket, the C beam bracket, the B beam bracket and the main beam No.0 bracket are constructed according to the process, thereby ensuring accurate, safe and reliable construction of the large steel bracket.
