Design and stability study of high beam formwork support of metro station

Abstract：In order to improve the stability of the high-formwork support of metro station, a triangular stable support structure was designed based on the a metro station project in Zhengzhou and the actual working conditions on site.The bearing capacity of the vertical pole was checked according to the current specification, and the eigenvalue buckling analysis and nonlinear buckling analysis of the support structure were carried out based on ANSYS finite element analysis program.The results showed that design value of stable bearing capacity of the vertical pole of the high beam formwork support structure was greater than its axial force design value, and the construction of the frame could meet the specification design requirement.The triangular stable support structure consisting of split bolts, beam side stabilizer bars and horizontal additional stabilizer bars was provided, and it could effectively enhance lateral stiffness of transverse plane of formwork support structure.The stable ultimate bearing capacity of stability was 9.2%higher than traditional support structures, and the structural ductility was also improved.The triangular stable support structure design could effectively improve the stability of the concrete beam formwork support structure, and it also could provide references for similar projects.

Keyword：metro station;high beam formwork support;triangular stable support structure design;stability check;numerical simulation;