| 摘要 |
PURPOSE:To shorten a construction period by a method wherein with a frame body stood on a periphery of an expected site, a crane is placed outside a site expected as a bridge pier, the crane is used to lift a hung frame, and a bridge is constructed while being supported by a pair of cranes between adjacent bridge piers after the piers are constructed. CONSTITUTION:A bridge 12 is extended between bridge piers 10, 10 formed by depositing concrete at the site to have the bridge pier 10 formed on a base in the ground, and as a frame body 16, four pillars 16a made of H-beams and beams 16b on the upper end are provided. With four screw rods 18 provided with a crane 17 placed on an outer side of the bridge 12, a frame for a bridge pier is placed on a working scaffold 20 at the lower end and a driver 24 is placed at the upper end. The bridge pier 10 is formed by repeating placement of a reinforcing bar 30 and concrete in the frame 22 to have a frame support 21 and a frame 34 mounted on a truss, and the bridge 12 is formed between the bridge piers 10, 10 by constructing placement of reinforcing bars and concrete. This establishes safety operation. |
