| 摘要 |
PROBLEM TO BE SOLVED: To provide a dredge method capable of further efficiently pumping up, on a surface of water, sludge which is deposited over a wide range on the water bottom ground.SOLUTION: As a suction body 1, a head connection body is used which is configured by connecting a plurality of suction heads 2 each including a casing 3 in which a porous suction port 4 is provided in the center of a planar bottom face 3a and a plurality of tabular guide plates 5 which are curved around the suction port 4 in a planar view and radially projected on the bottom face 3a. The suction body 1 is suspended from a throw-in part 13 which vertically penetrates a base ship body 11, via a suspension tool 14, moved downwards at a predetermined position and placed on a water bottom ground B. Sludge G deposited on the water bottom ground B is sucked from the suction port 4 communicating to a suction pump 9 thereafter and pumped up through a pumping pipe 8 to the surface of water. |
