A FABRIC FOR PREVENTING FALL OF A ROAD BRIDGE

摘要

A structure for preventing inversion of pier foundation for a road bridge is provided to prevent collapse of the bridge, and to cut down the repair expense by restricting overturn of the pier against the lateral movement of soft ground. A structure for preventing inversion of pier foundation includes a reinforcing jacket(10) having a basic rim(11) placed in a base concrete part of a lower part of a pier and formed to be larger than the base concrete part, a main wall formed in the basic rim, arranged around the pier and provided with an uneven part and plural reinforcing ribs(13) formed in a triangle between the basic rim and the main wall; plural assembling bolts(20) combined with the reinforcing jack by penetrating the pier; non-shrinkage concrete(30) cured between the main wall of the reinforcing jacket and the pier to assemble the pier with the reinforcing jacket; and plural reinforcing piles(40) arranged in the lower part of the basic rim in the circumferential direction, and provided with bolts combined with nuts and a sharp part fixed to a base rock layer to support the pier. The reinforcing jacket is divided into left and right parts, and the reinforcing ribs are formed at free ends of the divided parts opposed to each other and combined with the bolts.