Being the shaving device which shaves the inside in the expansion gap which extends

摘要

PROBLEM TO BE SOLVED: To provide a grinding device for allowing adequate grinding work for a joint gap inner face formed at the end of a concrete floor slab of a bridge, although conventionally considered to be difficult.;SOLUTION: In a grinding device 21 using high pressure water for grinding the inner face of a joint gap 6 formed at the end of a concrete floor slab of a bridge while extending in the width direction of the bridge, a high pressure water supply pipe 23 is vertically provided which has a high pressure water injection nozzle 22 at the lower end. The high pressure water supply pipe is moved up and down for the high pressure water injection nozzle to be inserted/extracted into/from the joint gap, and the high pressure water supply pipe is reciprocated in the width direction of the bridge for the high pressure water injection nozzle to be reciprocated along the inside of the joint gap. An installation unit 24 is installed on the upper face of the concrete floor slab 1 for supporting the high pressure water supply pipe to be moved up and down and reciprocated in the width direction of the bridge while supporting the high pressure water supply pipe vertically. The high pressure water injection nozzle is moved in the width direction of the bridge while being inserted into the joint gap from the upper side of the concrete floor slab, to grind the inner face of the joint gap.;COPYRIGHT: (C)2013,JPO&INPIT