METHOD AND APPARATUS FOR DREDGING AND REMOVING AQUATIC VEGETATION

摘要

A method and apparatus for dredging sediment from aquatic environments and cutting aquatic vegetation therein includes using a cutterhead mounted to a dredge. The cutterhead may be mounted to a shroud, the cutterhead including a rotating drum having an array of teeth assemblies which auger cut vegetation toward a port in the shroud for discharge via a pump. The shroud also includes stationary cutterbars having cutterbar teeth assemblies. The teeth assemblies preferably include back-to-back tooth pairs wherein individual teeth have a flat backside and a raised or convex front side which may be provided with serrated cutting margins. Using back-to-back tooth pairs enables cutting of more types and sizes of aquatic vegetation, reducing downtime due to clogging, bending or breakage versus conventional single teeth cutterheads. The shroud may include an upwardly and/or forwardly extending shield along its top front edge to deflect water and/or vegetation back toward the drum.