| 摘要 |
<p>Provided are a hammering inspection method which makes it possible to cause a rotary hammering tool with a large self-weight to follow and generate large impact sounds by work requiring little labor, that is, by pushing a truck forward along a road surface, and accurately distinguish between the impact sounds corresponding to the presence and absence of a damaged portion inside a road, and a hammering device. A main body (20) of a rotary hammering tool (2) has a cross section formed into a polygonal shape, and is configured such that when the main body is rotated on a road surface (41), vertexes (22) of the outer periphery thereof come into impact contact with the road surface (41) successively at equal intervals (24) and generate impact sounds, and the main body (20) is coupled to a truck (1) and moved on the road surface (41) by being pulled by the truck (1) to thereby generate the impact sounds successively. Using the fact that the sound pressure levels of the impact sounds generated successively from the respective vertexes (22) differ between (36a) when a damaged portion (48) is present inside the road and (36b) when the damaged portion is absent inside the road, the presence or absence of the damaged portion (48) inside a road (40) is detected.</p> |
