FOUNDATIONDESIGN

www.ramboll-wind.com

ExAcTING SOlUTIONS TO SUIT yOUr SITE AND yOUr TUrbINE

www.ramboll-wind.com

Foundation design folder sep. 09_2.indd 1-2 2009-08-31 14:24:12

Germanischer Lloyd, Applied standards may be IEC61400-3 and/or other international codes. Our services also include liaison with a certifying authority.

Furthermore the design is performed in close cooperation with the turbine manufacturer due to the highly complex load characteristics on the turbine and foundation structure.

Selected references

• Klasården(Sweden)• KentishFlats(UK)• BurboBank(UK)• Lynn&InnerDowsing(UK)• RobinRigg(UK)• RhylFlats(UK)• Nordergründe(Germany)• GreaterGabbard(UK)• Walney(UK)• BlighBank(Belgium)• Thanet(UK)• SheringhamShoal(UK)• NordseeOst(Germany)

FOUNDATIONDESIGN

DETAIlED DESIGN OF SEcONDAry STEEl

Our detailed design of secondary structures includes the following items:• J-tubesandJ-tubesupports• Internalplatforms• Externalplatforms• Boatlanding• Laddersandintermediaterestingplatforms• Sacrificialanodesincludingsupports• GroutskirtandgroutingsystemThedeliverablesrelatedtothedesignofsecondarysteelinclude 3D CAD model, design drawings and design documentation.

who are we?

TheOffshoreWindregionispartoftheRambollgroupwhichemploys8,800dedicatedspecialists.Wearealeadingknowledge-basedcompanyoperating in a broad international context from close to 190 offices around the world.

TheRambollGroupprovidesengineering,consultancy,productdevelopmentandoperationserviceswithintheareasof:Buildings&Design,Infrastructure&Transport,Energy&Climate,Environment&Nature,Industry&Oil/Gas,IT&Telecom,Management&Society.

Rambollisworldleaderinoffshorefoundation design for wind turbines.OurOffshoreWindregion has currently performed more than 700 individual designs for 13 offshore wind farms around theworld.ThedesignsarecarriedoutusingRamboll’sownstate-of-the-art software programme. Thesoftwarehasbeendevelopedover the last 25 years and is continuously being updated and supplied with new features and models.

Unique foundation design

Our detailed foundation designs are based on the actual site conditions and the water depth ateachturbine’sposition.Thisresults in unique and individualised foundation designs ranging frommonopoleorjackettoGBSor an entirely different type of foundation. Compared to a design philosophy using groupings of foundations, our approach can

provide our customers with substantial material savings due to the optimised design.

AtRambollwebelievethat a professional foundation design requires that all phases in the life cycle of the wind turbine - from fabrication, transportation and installation to operation, maintenance and decommissioning-aretaken into account. Furthermore the interaction between the primary and secondary structures must also be considered and forms an integral part of our design services.

Foundation types

Therearemanypossibilitiesasfar as choice of foundation type goes.Theturbinefoundationcanbe a steel monopile, a concrete gravity base structure, a steel or concretetripod,asteeljacketoranother concept altogether.

Basedonfactorssuchasthechoiceof turbine and site conditions, Rambollwillcarryoutthenecessary analyses to select the best suited foundation type for your project and assist in all phases of the project development.

Detailed design of foundations

Our design of primary foundation structures includes:• Extremeeventanalysis• Scourdevelopmentand

possible protection system• Naturalfrequencyofthe

integrated structure• Fatiguecalculations• Shipimpactsimulation• Geotechnicaldesign•FEManalysisofdetails

Rambollwillcarryoutthedesignaccordingtoanyacknowledgedstandard required to have the project certified by a certifying authoritysuchasDNVor

Foundation design folder sep. 09_2.indd 3-4 2009-08-31 14:24:14