OVER BRIDGE DISASSEMBLE METHOD

摘要

The present invention relates to an overbridge disassembling method which safely disassembles an overbridge comprised of a slab and girders, and uses a falling object prevention hole which can prevent water leakage. The overbridge disassembling method comprises: (a) a step of installing a falling object prevention hole between lower portions of girders integrated with a slab; (b) a step of cutting the slab in a transverse direction to form a slab and girders having a transverse width (d); and (c) a step of recovering the slab and the girders. The falling object prevention hole comprises two falling object prevention plates and anchor bars disposed on upper portions of the falling object prevention plates and anchored on the girders. The two falling object prevention plates are installed side-by-side and supported by lower flanges of the girders. The two falling object prevention plates are put together by an upper mounting hole formed on the upper surface of the falling object prevention plates.