Wind Turbine Generator (WTG) foundations

Wind Turbine Generator (WTG) foundations

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Jackets with suction pile foundations

If you’re looking for some significant cost reductions in the fabrication and offshore installation of a jacket, founding it with SPT Offshore’s suction piles is the solution.

Benefits of suction piles for jacket foundations

  • Proven technology with numerous suction pile founded platforms installed worldwide
  • Very swift offshore installation a couple of hours for suction operation compared to several days pile driving
  • Fabrication costs are reduced significantly, since no pile sleeves, -catchers, -centralizers, mud mats and leveling padeyes are required
  • No pile drive-, leveling- and grout spread and operation required
  • Noise free installation
  • Easy decommissioning by reversed installation
  • If buoyancy tanks are applied, no heavy lift vessel is required for installation
  • Platform can be relocated, spreading CAPEX
  • Engineering and installation by one party, hence SPT Offshore takes over installation and in-situ responsibility
  • Integrated scour protection system, hence no seabed preparations or rock dumping

Product Characteristics

  • Traditional jacket with integrated suction pile foundation
  • No limits in topsides weight
  • Water depth up to 120 meter

Transportation & Installation

  1. Fabrication of jacket
    • In dry dock for wet tow to site
    • On quaysise for transportation with cargo barge
  2. Wet of dry tow to field
  3. Ballast or lift jacket to seabed to self weight penetration
  4. Install suction pumps and connect umbilicals to control container
  5. Install suction piles
  6. Remove buoyancy tanks and recover suction pumps
  7. Install topsides by floatover or lift

Tri-suction Pile Caisson (TSPC)

If you’re looking for low cost and eco-friendly suction pile foundations for offshore wind turbines, the TSPC is the solution.

Benefits of the TSPC

  • Innovative combination of proven technology results in low risks and high predictability
  • Economical fabrication
  • Very swift offshore installation
  • Noise-free and vibration-free installation
  • Removal and decommissioning by reverse installation – Fast and without a trace

Product Characteristics

  • Combining cost efficient monopile technology with the superior foundation performance of a suction piles.
  • 30% cost saving compared to piled jackets
  • Wind turbines from 5MW to 15MW
  • Water depths up to 60m
  • Suited for wide range of soils from:
    – loose to dense sands
    – soft to stiff clays
    – layered soils
    – sediments over rock