WORK EXECUTION METHOD FOR CONCRETE BRIDGE PIER

PROBLEM TO BE SOLVED: To omit a mold release, shorten the construction period, and improve safety by stacking circular precast formworks on the foundation, erecting steel frames inside, and placing concrete inside while using the precast formworks as an outer formwork. SOLUTION: Circular precast formworks 1 are manufactured at a factory, they are stacked to the desired height on the foundation 2, and reinforcing bars are arranged inside the formworks 1 in parallel with the stacking work. Belt reinforcing bars 3 are fitted on the outer face of a belt reinforcing bar fixing jig 6 during the stacking work after the formworks 1 are formed into circular bodies on the ground. Steel frames 4 are erected around a precast member 7 in parallel with the stacking work of the formworks 1. The formworks 1 and the steel frames 4 are connected in required stages to the height of a desired bridge pier, then concrete 5 is placed between the precast member 7 and the formworks 1. The formworks 1 fitted with the belt reinforcing bars 3 are manufactured at the factory, and the fitting work of the belt reinforcing bars 3 at the site can be omitted.