DREDGING

Dredging - soil plug removal

Pile Dredging Solutions - soil plug removal

DECO Subsea owns and operates a unique range of pile dredge tools (all of them designed and built in-house) to support our pile cutting activities. We have pile dredging tools to remove any type of soil from loose sand to stiff clay, grout and rock in order to make the piles accessible for our internal cutting tools.

Clay/grout/rock dredging

For difficult soil types, DECO Subsea designs, builds and

operates a range of heavy duty pile dredging tools based on high pressure waterjet technology combined with traditional dredging techniques.

To date DECO Subsea has successfully dredged over 750 piles in all soil types including London clay, 116 MPa limestone, 135 MPa grout and 184 MPa granite.

Sand dredging

For non-cohesive material dredging, DECO Subsea uses jet-assisted air lift systems or its DOP 1815 submersible hydraulic dredge pump.

These tools provide excellent production rates in loose sandy or gravelly soils, but are unable to deal with more challenging soil conditions such as clay, grout or rock.

For improved performance in specific circumstances, the simple airlift system may be equipped with waterjets.

For a specific application for the Belgian Navy, we have combined various tools into a micro-cutter suction dredge.