Offshore Wind Farm cable route engineering

  • Client Confidential
  • Year N/A
  • Business unit Renewables

Our client is a global leader in the renewable energy sector tendering for development sites in The Crown Estate Round 4 leasing process. They had selected five potential sites in England and Wales to take forwards for preliminary technical assessment.

Apollo was engaged to assess potential export cable routes and landfall locations because of our experience in the geophysical and geotechnical environments of the Round 4 leasing zones across Dogger Bank, East Anglia, South Coast and East Irish Sea regions.

The Problem

To select and progress the most viable opportunity our client needed to confirm with confidence:

  • Routes and landfall locations were feasible;
  • Recommended burial depths, methods and rationale for each route;
  • Suitable cable protection methods;
  • The most suitable landfall installation methods; and
  • All major routing and geotechnical risks along the export cable route, ruling the route in, or out of future inclusion.

Our Solution

Apollo undertook all cable route engineering and burial assessment for all 5 export routes including:

  • Review of all cable concept data (size, submerged weight, MBR, bending stiffness, etc.);
  • Review of all survey data;
  • Development of GIS database models;
  • Calculation and assignment of thermal conductivities, geophysical regions, etc.;
  • Full review of installation feasibility along the route;
  • Consideration of all geotechnical parameters in preparation for investigation of pre-dredge, ploughing, trenching capacity and all tooling options and specifications;
  • Identification of crossings;
  • Assessment of suitable protection for all areas;
  • Review of landfall methods with recommendations of all physical constraints, construction implications survey requirements, pull-in station implications and technical risks.

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