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CONSTRUCTION DES FONDATIONS DES ÉOLIENNES SUR LE SITE DE CONSTRUCTION

Gravity base foundation on workyard:
" Halve Maan" Oostende

Transportation area: cross section.

New quay wall: foot print

New quay wall: cross section

Work yard "Halve Maan" Oostende
Work yard area for 6 GBF: 4.840m2
Length foundation piles ca 25m: 9.100m, diameter 460/560
Concrete slabs: 3.630m3 _ 538 ton steel
Bearing capacity: 100.KN/m2
Transportation area: 2.760m2
Length foundation piles ca 13,5m: 8.400m, diameter 410/460
Pavement of recycled concrete: 3.300m3
Geo-grids: 7.065m2

New quay wall
Concrete slab: ca 40m x 35m
Bearing capacity: 100 kN/m2

GBF: formwork and construction phases

GBF construction

Construction area: foot print and cross section

Time Schedule

May 2007 - September 2007
Preparation workyard

August 2007 - April 2008
On-shore construction gravity base foundations
New quay wall

May 2008 - June 2008
Transport to off-shore location
Installation off-shore

Gravity base foundation

Dimensions
-Height: ca 42m
-Weight: ca 2.700 to 3.000 ton
-External diameter
-Base slab: 23,50m
Conical part: from 17m to 6,5m
Cylindrical part: 9,10m

Concrete : ± 6.800m3
-Reinforcement
Normal: ± 1.500 ton
Post-tensioning tendons; 36 pieces – each 1770 MPa tensile strength

Gravity base foundation


Filling
Volume: ca 2.000 m³
Weight: ca 3.800 ton

Off-shore pit
Excavations: ca 80.000 m3 sand
Backfilling: ca 50.000 m3
Gravel bed and erosion protection system: ca 4.510 m³ stones per GBF

  Scheldedijk 30 - Haven 1025 - 2070 Zwijndrecht, Belgium - Tel. + 32-3-250 55 51 - Fax + 32-3-250 55 52 - E-mail: c-power@c-power.be