PLANTS &
EQUIPMENTS



Mechanical Dredging

Bucket Ladder Dredger

Area of Application:
The bucket dredger can be applied in almost all soils, from soft silt and clays to soft rock depending on the power on and the strength of the bucket chain. The maximum dredging depth depends on the size of the dredger. However for such dredgers the minimum dredging depth is almost 8m.

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Grab Dredger/Clamshell Dredger

Area of Application:
The large grab dredgers are used for bulk dredging. While the smaller ones are mostly used for special jobs, such as:

  • Difficult accessible places in harbors.
  • Small quantities with strongly varying depth.
  • Along quay walls littered by rubbish and debris.

The production of a grab depends strongly on the soil. Suitable materials are soft clay, sand and gravel. In soft soils light big grabs are used while in more cohesive soils heavy small grabs are favorable. The dredging depth depends only on the length of the wire on the winches. However the accuracy decreases with depth.

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Excavator/Backhoe Dredger

Area of Application:
This is roughly the same as for the clamshell dredgers with smaller size footprint. The backhoe can dredge with high accuracy. However, similar to the clamshell dredger, production rate over large area is very slow because of the need for re-positioning.

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