Foundations / EPCI

Drilling and hammering large diameter piles in challenging offshore conditions requires special skills honed from decades of experience and the right equipment. Mooring and berthing dolphins are up to 40 m long and may have a diameter of 3 m, while monopile foundations for offshore wind farms can be up to 85 m in length and 8 m in diameter. Cranes, frames, casing, hammering and drilling equipment must be tailored for the size and the weight of the pile. 

DEME Offshore’s extensive project portfolio has included foundations for the construction of jetties, mooring facilities, bridges and offshore wind farms, amongst others. Transport & Installation of these often enormous structures requires dedicated vessels and precision accuracy.

Our teams are also experts in Gravity Based Foundations, which are placed on top of a specifically prepared and levelled bed. Soft soil improvement techniques strengthen the ground bearing capacity of a particular area and make it fit for the installation of heavy cranes, terminals, warehouses and other infrastructure. Techniques depend on the soil conditions and vary from Vibro Compaction, over vibro stone columns and soil mixing, to grouting and mixing with stabilising additives.

Additionally, another DEME subsidiary DIMCO is able to execute all piling works for quay walls, jetties and similar marine foundation structures with its own equipment, be it sheet piles or profiles, combi-walls and steel piles or concrete piles up to 50 m in length.   

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