| 摘要 |
A dredging head assembly (12) for deploying on the bed (6) of a body of water (2), is provided, the assembly comprising a cutter housing (104) having a cutting opening (122) for extending over a section of the bed from which material is to be removed; a cutting assembly (130a) disposed within the cutter housing, the cutting assembly operable through the cutting opening in the cutter housing to loosen material from the bed; and an outlet opening (148) in the cutter housing for removing water and entrained material from within the cutter housing under suction; wherein the cutter housing comprises a plurality of holes (140;240) therein, in use water being drawn into the cutter housing through the holes under the action of reduced fluid pressure within the cutter housing. A dredging assembly (10) comprising the dredging head assembly (12) and a method of dredging are also provided. |
