The method of construction reinforcement recovery deflection of existing bridges by the lower chord cable

摘要

PROBLEM TO BE SOLVED: To provide a bending recovering reinforcing construction method for an existing bridge for recovering a sunk and bent part of the bridge hanging down in a V shape to lift it in a plane.;SOLUTION: In the bridge 1 stretched and provided by supporting a section between concrete bridge girders 2 and 2 and connecting them by hinge connection in a plurality of sections in the direction of width of the bridge girders 2, 2, a strut 6 is attached to a lower side of the sunk and bent part 5 hanging down in the V shape between the bridge girders 2 and 2 while nipping the sunk and bent part 5 from the direction of length of the bridge girders 2, 2, a rubber-made cushioning material 13 is set inside each hinge connection part 3, and a bottom chord cable 8 stretched between bridge piers 4 and 4 supporting the bridge girders 2, 2 causing hanging-down is inserted into a connection part 6c whose inside positioned at a lower end of the strut 6 is a cavity. The bottom chord cable 8 is tightly stretched by a jack for tightening on both bridge pier 4, 4 sides supporting the bridge girders 2, 2 causing hanging-down, and the sunk and bent part 5 is lifted through the strut 6 for recovery.;COPYRIGHT: (C)2006,JPO&NCIPI