| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a grab bucket for finishing excavation and a finishing excavation method, capable of scraping off sediment at a convex raised part of a water bottom surface and moving it to a nearby concave part after the water bottom surface is roughly excavated. <P>SOLUTION: The grab bucket for the finishing excavation is used in order to excavate the sediment at the convex raised part of the water bottom surface generated after rough excavation by a grab bucket for excavation by respective shells and move a large part of the excavated sediment to the nearby concave part. For the respective shells, the bottom plate is formed in a roughly flat shape, and they are formed such that the bottom surfaces of the bottom plates of the respective shells when the respective shells are mutually closed are turned to one roughly flat surface altogether. Also, in the finishing excavation method, by pressurizing the bottom parts (one roughly flat surface) of the respective closed shells from the upper part to the convex raised part of the water bottom surface after being excavated or the like, the convex raised part is crushed. <P>COPYRIGHT: (C)2012,JPO&INPIT |
