Case Studies

Elevated Platform

Project: Subsea Shore Connection Platform

Client: Maritech / Prysmian

In late 2021, whilst undertaking the main enabling works on the Viking link project, DMJ was approached by the client to help resolve an issue that required an elevated drilling platform to permit the sea-to-shore connection of the HV cable connecting Denmark to the UK.

Issue

The sea-to-shore connection of the cable ducting required a drill from the shoreside to the seabed to connect up the offshore to landfall cabling. The cable and ducting can then be installed at the converter station. Site levels were not considered to allow sea ingress whilst drilling activities were undertaken.

Solution

Creation of a temporary 2.5 metre elevated stone working platform to ensure water ingress was prevented.

DMJ worked closely with the client and its design team to develop a solution: to build
the platform using gabion baskets. DMJ commenced construction of the baskets for 2 3 the outer perimeter and then infilled with 17,500 tons of stone in compacted layers.
The result was a fully functional, secure, elevated drilling platform that turned a
potential project delay into a seamless and effective activity.

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