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Site Investigation For Offshorewind Version 1 Oi 10 Rev 1

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Site Investigation For Offshorewind Version 1 Oi 10 Rev 1

  1. 1. Site Investigation for Offshore Wind A multi-disciplinary approach Ing. Mattijs de Lange Bsc. GARDLINE GEOSCIENCES
  2. 2. Introduction <ul><li>Speaker </li></ul><ul><li>The story in 20 minutes </li></ul><ul><li>Acknowledgement and references </li></ul><ul><li>Questions </li></ul>
  3. 3. How and Why - Engineering and Site Investigations for Offshore Wind Farms In 20 minutes The Multi-Disciplinary Approach
  4. 4. Choose a Location
  5. 5. Design Your Layout
  6. 6. Choose your Support Structure
  7. 7. Components
  8. 8. Force on the Foundation
  9. 9. Preliminary Site Assessment <ul><li>Geological model of the site </li></ul><ul><li>Preliminary key geological processes </li></ul><ul><li>Preliminary met ocean conditions </li></ul><ul><li>Identify geotechnical risks </li></ul><ul><li>Identify areas of insufficient information </li></ul><ul><li>Outline scope of additional survey </li></ul>
  10. 10. Preliminary Site Assessment
  11. 11. Preliminary Site Assessment
  12. 12. Preliminary Site Assessment
  13. 13. Preliminary Site Assessment
  14. 14. Site Investigations <ul><li>Geophysical Survey </li></ul><ul><li>Geotechnical Survey </li></ul><ul><li>Met Ocean Study </li></ul>
  15. 15. Outline your Scope for Geophysical Survey <ul><li>Establish bathymetry </li></ul><ul><li>Indentify and locate seabed hazards </li></ul><ul><li>Determine geometry of subsurface layers </li></ul><ul><li>Outline your scope for geotechnical survey </li></ul>
  16. 16. The Right Survey Vessels MV Confidante MV L’ Espoir
  17. 17. The Right Equipment
  18. 18. The Right People
  19. 19. Bathymetry
  20. 20. Significant Seabed Features
  21. 21. Geometry of Subsurface Layers
  22. 22. Geometry of Subsurface Layers
  23. 23. Outline Scope of Geotechnical Survey <ul><li>Thickness and properties of seabed layers </li></ul><ul><li>Complexity of the geological model </li></ul><ul><li>Presence and distribution of hazardous layers </li></ul><ul><li>Variability and uncertainty in geotechnical parameters </li></ul>
  24. 24. The Right Drill Vessel
  25. 25. The Right Equipment
  26. 26. The Right People
  27. 27. Geotechnical Survey provides <ul><li>Refined geological model </li></ul><ul><li>Variation in ground conditions </li></ul><ul><li>Idealised ground profile at foundation location </li></ul><ul><li>Geotechnical parameters for foundation design </li></ul><ul><li>Identification of geotechnical hazards </li></ul>
  28. 28. Geotechnical Survey Result
  29. 29. Geotechnical Survey Result
  30. 30. Refined Geological Model
  31. 31. Parameters for Foundation Design
  32. 32. Parameters for Foundation Design
  33. 33. Met Ocean Data
  34. 34. Met Ocean Data
  35. 35. Final Foundation Design <ul><li>Length </li></ul><ul><li>Diameter </li></ul>
  36. 36. Foundation Design
  37. 37. Foundation Design
  38. 38. Data Integration and Contracting <ul><li>Site parameters and conditions </li></ul><ul><li>Drafting of tenders </li></ul><ul><li>Contracting </li></ul>
  39. 39. Installation and Commissioning Phase
  40. 40. Operations and Maintenance Phase <ul><li>Crew and support vessels </li></ul>
  41. 41. Decommissioning Phase In 25 years time ! 2035 ?
  42. 42. Acknowledgements <ul><li>David Cerda Salzman TU DELFT </li></ul><ul><li>Albert van der Hem BLIX </li></ul><ul><li>Maarten Timmerman EVELOP </li></ul><ul><li>Bernard van Hemert BELWIND </li></ul><ul><li>Eric Zon GARDLINE GEOSCIENCES </li></ul>
  43. 43. Questions Ing. Mattijs de Lange Bsc. Gardline Geosciences

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