Abstract：
Yongding Tower is the highest ancient tower in Beijing imitating the tower style in Liaojin era and it is also the highest existing concrete pseudo-classic building in China. The three beams crossed over each other and caused complex reinforcement layout, inconvenient formwork support and difficult setting of concrete construction joint. The fly rafter is bidirectional arched plate of special shape and the arch angle is different on different floors, producing great difficulties for concrete construction. After research, CAD software was used to process the molding formwork and to realize integral construction of formwork support of the triple beams and optimization of steel reinforcement and concrete construction processes. Characteristic arch was selected, joist was controlled and support was set at the position of characteristic arch, to successfully solve the technical difficulties in construction of complex hyperboloid plate and to realize one-off casting and molding. High structural integrity and high-quality construction quality successfully realize the perfect design concept.
