KAREHAMN WINDFARM FOUNDATIONS, SWEDEN activiteiten Pianc België... · 1. DESIGN 2. ONSHORE 3. OFFSHORE Studiedag PIANC Jongeren, 26 april 2012 2.2 ONSHORE KAREHAMN WINDFARM FOUNDATIONS,

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KAREHAMN WINDFARM FOUNDATIONS, SWEDEN

Studiedag PIANC Jongeren, 26 april 2012

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1. GENERAL

2. 3 PHASES:

COMBINED WORKS – Civil & Marine Works:

1. DESIGN

2. ONSHORE – Prefabrication

3. OFFSHORE – Installation

TOPICS

1. GENERAL2. 3 PHASES

1. DESIGN2. ONSHORE3. OFFSHORE

Studiedag PIANC Jongeren, 26 april 2012KAREHAMN WINDFARM FOUNDATIONS, SWEDEN

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Studiedag PIANC Jongeren, 26 april 2012KAREHAMN WINDFARM FOUNDATIONS, SWEDEN1. GENERAL

EMPLOYER: E.ON Vind Sverige AB

(subsidiary of E.ON AG, Düsseldorf)

CONTRACTOR: Jan De Nul N.V.

CONTRACT: Design & Build of 16 GBF’s (Gravity Based Foundations)

Main Subcontractor: Heavy Lift RAMBIZ with SCALDIS

CONTRACT PRICE: ~ 25,6 mio €

SCHEDULE: 7 SEP 2011 – Time for Completion: 30 SEP 2012

9 10 11 12 1 2 3 4 5 6 7 8 9

DESIGN and ENGINEERINGCONSTRUCTIONINSTALLATION

6 months5 months

4 months

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LOCATION: ÖLAND, SWEDEN – 5km offshore

1. GENERAL

Baltic Sea

Glacial Tillwith boulders

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V112 3 MW Turbines of VESTAS

16 GBF’s in reinforced concrete

Varying height 12.5 – 24.5m

Dia. Foundation 18m

1,800 Tonnes

1. GENERAL

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Studiedag PIANC Jongeren, 26 april 2012KAREHAMN WINDFARM FOUNDATIONS, SWEDEN2.1 DESIGN

TENDER DATA

1st PHASE: 1st iteration – 3 cases

-> Draft Design Basis and Design Loads by Employer

-> Draft Design, including stiffness, mass distribution and drawing withgeometric dimensions by Contractor

2nd PHASE: 2nd iteration – 4 cases

-> Final Design Basis and Design Loads by Employer

-> Final Detailed Design by Contractor (after 5 months)

-> Certification DNV (after 6 months)

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Natural Frequency

Extreme Events

Corrosion and cathodic protection

Ship impact analysis

Geotechnical design

Hydrodynamic design

Structural design

Gravel bed design

Scour protection

Implementation of WTG connection

Fatigue check

Physical model tests

Incorporate Contractor’s functional requirements to the structure duringtransport and installation

Calculate weight and centre of gravity of foundation structure

Ballast analysis (martite…)

Secondary Steelwork; Detailed design




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Studiedag PIANC Jongeren, 26 april 2012KAREHAMN WINDFARM FOUNDATIONS, SWEDEN2.2 ONSHORE

Port of Zeebrugge

DN143 (24,000T barge) – 12 elements

DN120 (10,000T barge) – 4 elements

Barge deck preparations

Steel reinforcement prefabrication

4 Tower cranes, 1 Mobile crane 60T, telehandler, generators

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Main Quantities:

• 10,000 m³ concrete C45/55 CEMIIIALA S4

• ~ 630 m cooling pipes in the icecone (~ 10km total)

• XXX Tons of reinforcement steel

• Some sections 435 kg/m³reinforcement

• Average of 3.5 complete steelformwork sets

• Upto 60 pax manpower – 1 shift of12hr

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Secondary (steel) items / element:

BAC (Bolted Anchor Cage) – 12T; 160 bolts M36

2 J-tubes & cable hang-offs

10 anodes per element

Lightning protection

Railings & gates

Bollards

Emergency ladder

4 lifting points

External Working platforms

Water inlets, drainage outlets, ballast openings…

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Studiedag PIANC Jongeren, 26 april 2012KAREHAMN WINDFARM FOUNDATIONS, SWEDEN2.3 OFFSHORE

1. SEABED PREPARATION

Excavation/dredging with backhoe dredger type ‘Jerommeke’

Check of soil parameters

Placing of the gravel bed + survey check

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2. INSTALLATION OF GBF’s

Installation of the GBF’s with RAMBIZ

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3. BALLASTING & SCOUR with multipurpose pontoon DN109

Ballasting of the shaft part

Ballasting of the ballast chambers

Installation of Scour protection

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Questions … ?

END

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KAREHAMN WINDFARM FOUNDATIONS, SWEDEN activiteiten Pianc België... · 1. DESIGN 2. ONSHORE 3. OFFSHORE Studiedag PIANC Jongeren, 26 april 2012 2.2 ONSHORE KAREHAMN WINDFARM FOUNDATIONS,