General Considerations
The cutter suction dredger is a stationary dredger equipped with a cutter device (cutter head) which excavate the soil before it is sucked up by the flow of the dredge pumps.
During operation the dredger moves around a spud pole by pulling and slacking on the two fore sideline wires. This type of dredger is capable to dredge all kind of material and is accurate due to their movement around the spud pole. The stationary cutter suction dredger is to distinguished easily from the plain suction dredger by its spud poles, which the last don’t have.
The spoil is mostly hydraulically transported via pipeline, but some dredgers do have barge-loading facilities as well. Cutter power ranges from 50Kw up to 5000Kw, depending on the type of soil to be cut.
The ladder, the construction upon which the cutter head, cutter drive and the suction pipe are mounted, is suspended by the pontoon and the ladder gantry wire.
Seagoing cutter suction dredgers have their own propulsion that is used only during mobilization. The propulsion is situated either on the cutter head side or on the spud poles side.
Area of application
Cutter suction dredgers are largely used in the dredging of harbours and fairways as well as for land reclamation projects. In such cases the distance between the dredging and disposal areas is usually smaller than the distances covered by trailing suction hopper dredgers.
The cutter suction dredger also has the adbantage when an accurate profile has to be dredged. The cutter suction dredger can tackle almost all types of soil, although of coure this depends on the installed cutting power.
Cutter suction dredgers are built in a wide range of types and sizes, the cutting head power ranges between 20Kw for the smallest to around 4000Kw for the largest. The dredging depth is usually limited; the biggest suction dredger can reach depths between 25 an 30m. The minimum dredging depth is usually determined by the draught of the pontoon.
Advantages
Completely assembled and fully tested afloat before delivery
Simple, rapid assembly and dismantling
Ready for operation on arrival at site
Standard design, which implies early delivery and low price
Spare parts available from stock
Transportable by road, rail or sea
Reliable hydraulic system
Fresh water engine cooling system
Efficient fuel consumption
One-man operation
Wide range of optional equipment available
Optional equipment such as anchoring system, spud carriage system, swivel bend, accomodation room, ets. are avaiable
Julong quality products and service provide a broad cooperation space for us.
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