Mechanical Dredgers

 

 Mechanical dredgers come in a variety of forms, each involving the use of grab or bucket to loosen the in-situ material and raise and transport it to the surface. The dredging action starts when a bucket reaches the bottom of the ladder, where it loosens and scoops up a quantity of material. This material is carried in the bucket to the top of the ladder where, at the highest point of the chain, the bucket overturns and the contents are offloaded. The material falls into drop chutes and into a barge moored alongside the dredger. Each bucket then returns empty on the underside of the chain to the bottom of the ladder where the cycle begins again. The size of a bucket dredger is usually described by the capacity of the buckets, which is in the range - mechanical dredging.

The wire operated excavator unit has now been largely superseded by hydraulically operated backhoe machines. These operate more efficiently than the face shovel. The size of a backhoe dredger is described by the bucket capacity, which can vary between. Production is dependent upon bucket size and the hardness of the material. Breakout forces in excess of can be exerted by the larger machines, and because of the very high horizontal loads developed by the jigging action the backhoe dredger usually works on spuds - mechanical dredge.

These are heavy pile-like structures which can be dropped into the sea-bed by the dredger. Two spuds are mounted at the digging end of the backhoe pontoon to provide resistance and one backhoe excavator is very efficient and has good vertical and horizontal control; carefully worked it will produce a smooth profile. Because the bucket is heavy and relatively rigid, care needs to be taken to avoid damage to such features as quay walls and canal linings. For more information please visit our site https://www.Pacificmaritimegroup.com/