Horizontal movable up-down type supporting post and rapid replacing method of the bridge using the same

PURPOSE: A horizontally-movable up/down supporting post device and rapid bridge-replacing method using the same is provided to rapidly replace bridge since after the bridge is disassembled on a position to replace the bridge at a time, a crushing work is made at a separate crushing field, thus load generates on the position to replace the bridge. CONSTITUTION: A horizontally-movable up/down supporting post device comprises a rail bogie, a support frame, a safety foothold-vent, a hydraulic cylinder, a screw jack for the vent and another screw jack for bridge. The rail bogie makes horizontal movement. The support frame is installed on the rail bogie. The safety foothold-vent is installed on the support frame. The hydraulic cylinder is installed between the rail bogie and the support frame. The screw jack for the vent is installed between the support frame and the safety foothold-vent. The screw jack for bridge is installed on the top of the safety foothold-vent.