METHOD FOR CONSTRUCTING CYLINDRICAL CONCRETE STRUCTURE, INSIDE FORM DEVICE, AND FALL PREVENTION DEVICE

PROBLEM TO BE SOLVED: To provide an inside form device for a construction method including the steps of sequentially lifting the inside form device suspended by a crane stepwise from the bottom of a cylindrical concrete structure and placing concrete, and a fall prevention device. SOLUTION: The inside form device is lifted by the crane; a fall prevention bar is made to protrude in an upper form fall prevention device; and upper and lower form fixing members are remove; and the form is removed. A lower form fall prevention device 5 puts the fall prevention bar 50 into a protrusible state; the inside form device is lifted up to the next upper construction step position, and supported by the lower form fixing member; and a form panel of the inside form device is located and fixed in the molding position of the cylindrical concrete structure by the lower form fixing member. COPYRIGHT: (C)2010,JPO&INPIT