GRAB BUCKET FOR DREDGING AND DREDGING METHOD USING THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a grab bucket for dredging capable of suppressing turbidity producing and turbidity diffusion caused by curling-up due to rise of the grab bucket in dredging work while maintaining the efficiency of the dredging work, and a dredging method using the grab bucket.;SOLUTION: A pair of left and right shells 11, 12 of a grab bucket 10 are opened and closed to left and right by lifting down and up a connection shaft 20 by an operation wire W2 to make the pair of left and right shells 11, 12 swing around support shafts 18, 19 respectively. In a state that the pair of left and right shells 11, 12 are closed, a grab bucket ratio L/H, which is the ratio of a horizontal distance L between left and right ends of the pair of left and right shells 11, 12 to the shortest height H from a straight line connecting the right and left ends of the pair of left and right shells 11, 12 to the tip of the pair of left and right shells 11, 12, is set to be 2.0 or less and 0.5 or more so as to suppress curling-up of bottom sediment from a dredged ground when the grab bucket 10 is raised.;COPYRIGHT: (C)2014,JPO&INPIT