Small and medium size cutter suction dredgers can be dismountable and transportable over land. They can work in shallow waters and they also have flexible discharge alternatives. The self-propelled CSDs can travel long distances and be deployed in remote locations, far from their home port, making them flexible to be used all over the world. The most powerful cutters can dredge hard rock effectively on a continuous basis. By use of booster pumps in the discharge lines, they can transport and place materials at considerable distances from the work site. The pumps produce the flow required to lift the disaggregated material from the bed and then to transport a water-soil slurry through a pipeline from the dredger to a discharge point. The material dredged by a cutter is usually transported hydraulically through a pipeline, although some cutters have barge-loading facilities as well. The spud stays in the same spot allowing the dredger to make concentric circles during swinging. At the same time they cut with an accurate profile because of their movement around the spud. Spud poleĭuring operation the dredger moves around a spud pole by pulling and slacking on the two fore sideline wires. Dredging in hard soils will cause wear and tear so that cutter teeth need to be replaced regularly. This rotation disaggregates, i.e., separates, and excavates the soil which is then drawn into the suction pipe as a solid/water slurry and pumped to the surface.ĭifferent cutter heads are designed for specific types of soil, because hard soil, non-cohesive or cohesive soils have different requirements.

It is mounted in front of the suction head and rotates along the axis of the suction pipe. The cutter head is a mechanical rotating tool, which is able to cut hard soil or rock into fragments. The cutter suction dredger is equipped with a cutting device known as a cutter head.

Whether self-propelled or not, the cutter will be moored with spuds or anchors while at work so that in essence the dredging operation takes place with the cutter in a stationary position. be self-propelled, sea-going specially designed vessels.have a pontoon hull without a means of propulsion (non-propelled), or.

Small dredge pump