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Stone columns settle the seabed in Greece

As part of port expansion at Patras in Greece, Pennine is using marine vibropiling techniques incorporating the Aquacaster system for construction of a breakwater. Working for main contractor Bachy/TCGC joint venture, the Aquacaster system is being used to install 30,000 stone columns up to 20m below sea bed level in water up to 11m deep.

The technique is designed to densify the soft clays that underlie the seabed to increase bearing capacity and reduce potential settlement. It will also improve performance in the event of seismic activity.

Pennine and Bachy/TCGC have collaborated successfully in the past and as a result the contractor is mainly using its own staff to operate the specialist equipment. Pennine is supplying technical and practical guidance and has an on site fitter carrying out a rolling maintenance programme.

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