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HomeProjects Walney Offshore Substations Offshore Wind Farm

Walney Offshore Substations Offshore Wind Farm

Irish Sea

During 2010 and 2011 the Walney (UK) Offshore Windfarms Ltd. constructed the Walney 1 and Walney 2 offshore wind farms, located approximately 15km off Walney Island, Cumbria, in the Irish Sea.



Volker Staal en Funderingen provided the execution of the piling and grouting activities for the installation of the Walney Offshore Substation Jackets I and II as a subcontractor of Scaldis Salvage & Marine Contractors.

 

Each wind farm consists of 51 wind turbines of 3,6MW and 1 offshore substation.

 

The Walney 1 substation is connected to the UK National Grid via an export cable, which goes to a substation in Heysham.

The Walney 2 substation is connected to the UK National Grid via an export cable, which goes to a substation near Blackpool.

 

The 2 offshore substations collect the electricity of the 102 turbines with a total capacity of 367,2MW. In total the wind farms will be providing electricity for approximately 320,000 UK households.



Scope of Work

Supplying and operating a 72” Internal Lifting Tool for lifting 8 piles.

Supplying and operating piling equipment for driving 8 piles.

Supply of grout material OPC and executing grouting operations for the jacket – pile connection.

 

Both substation jackets have 4 pile sleeves where the piles are placed in.  After driving the piles to depth, the annuli between the piles and the pile sleeves are filled with cement grout, securing the jackets to the seabed.



Jacket I

4 piles dia. 1829 x 40/50/60 mm, length 59,9 metres.

Approx net. pile weight 136 Tonnes.

Approx. Grout volume 10m3 per pile connection.



Jacket II

4 piles dia. 1829 x 45/50/55 mm, length 45,5 metres.

Approx net. pile weight 97 Tonnes.

Approx. Grout volume 10m3 per pile connection.



Facts and figures

  • Client
    Dong Energy
  • Transport & Installation Contractor
    Scaldis Salvage & Marine Contractors nv
  • Installation Vessel
    HLV Rambiz
  • Execution Period
    2010 and 2011
  • Project categories
    Offshore
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