A without damaging the deck, safely and efficiently, it provides a removing method of the existing concrete bridges reinforcing concrete can be removed from the underside of the deck.
And A track rail 62, the slide stage 63 mounted so as to be slidable in its longitudinal direction, and guide poles erected thereon, a motor unit 65, constituted by a cutter blade 66 with wall cutter 61 there is provided a method of removing the existing concrete bridges, the wall cutter 61 is supported in a posture capable of rotating the cutter blade 66 along the lower surface 52a of the deck 52, the lower surface of the deck 52 cut to form a horizontal direction in the boundary portion 52a and the reinforcing concrete 53 to form a cut in the vertical direction further reinforcing concrete 53, disconnect the partial mass of reinforcing concrete 53 from the floor plate 52, bridges It is removed from.
.FIELD 1