APPARATUS FOR INSPECTING ELEVATED BRIDGE

PURPOSE:To enhance inspection accuracy by providing a frame provided with a guide rail to fix the same to a bridge girder in a detachable manner and mounting a link mechanism, a sensor stand, a measuring apparatus supporting a laser scanner and a light detection sensor and the lift apparatus of a base stand. CONSTITUTION:An elevated bridge inspecting apparatus is fixed to a bridge girder 3 in a detachable manner to be made long in the longitudinal direction of the bridge girder 3 and the base end part of a link mechanism is connected to a frame 4 equipped with a guide rail 9 and the base stand 10 engaged with the guide rail 9 so as to be revolvable in a horizontal direction. A sensor stand 24 is provided to the leading end part of the link mechanism 16 so as to be movable vertically and rotatable horizontally. Subsequently, a laser measuring apparatus supporting a laser scanner 25 scanning the laser beam 27 incident from a laser head 26 upwardly in predetermined amplitude and light detection sensors 30a - 30d detecting the reflected quantity of the laser beam 27 is mounted on the sensor stand 24. Then, the under surface of a floor panel 1 is scanned by the laser beam 27 to detect the surface properties of the floor panel 1. By this constitution, workability or safety can be enhanced.