breakwaters fdn en
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FDN Floating Breakwaters
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The FDN U-block is a oating breakwater element, thatreduces waves in marinas.
Floating breakwaters have some advantages over perma-
nent breakwaters:
Flexible; in time the confguration can be changed
Short construction time; the elements are
preabricated on shore
Low maintenance requirement
Little inuence on the transport o sediment
Low on costs
Functions
The U-block is a oating breakwater and a quay in one.
Due to this combination and the eectiveness o the U-
block, the U-block is an economic solution or marinas.
Design
The design o the FDN U-block was done in cooperation
with Delt University o Technology. The breakwater is very
eective to withstand waves up to 2 metres (6.6 eet) and
waveperiods up to 6 sec. For larger waves we can make a
custom-made design that suits the specifc location con-ditions. Up to 8 metres waveheight can be damped bij
FDN Floating Breakwaters.
For every marina we frst calculate the expected waves and
their height ater which we simulate the waves by compu-
ter and in our research centre. For simulation o the waves
we use 3D deraction simulation programmes.
FDN Floating Breakwater type U-block
FDN
FloatingBreakwate
rs
Two FDN Floating Breakwaters at Messolonghimarina in Greece (length 100 metres each)
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Structure
The FDN oating breakwater is made o B35 concrete with
reinorcement and a polystyrene core. The solid construc-
tion guarantees little maintenance o the U-block (design
lie 30 years).
Eectiveness
Under normal weather circumstances the U-block will re-
duce the waves up to 100%. In case o storm conditions
the U-block will reduce the waves up to 80 or 90%.
Connections
The connection o the U-block is made o exible rubber
and steel. We designed our own exible connector or this
breakwater and tested it to resist high pressure and tensile
orces up to 300 tons.
Anchorage
The anchorage o the breakwaters can be achieved by piles
or chains / cables with concrete anchor blocks.
FDN
FloatingBreakwaters
FDN U-block:Length: 25m / 82 eetWidth: 4,5m / 15 eetHeight: 4m / 13 eet
Weight: 135 tonsConnection: prestressed FDNconnections
Technical specifcations:Concrete B35 (35 N/mm2)Polystyrene (0,15 kN/m3)
e stresses in the U-block calculated in amputer simulation
mputer simulation of the wave height in frontd at the back of the U-block
oss-section of the FDN U-block
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Interested in our product? Please contact us.
FDN Engineering & Consultancy B.V.
Floating Structure Consultants
Laan van Vlaanderen 333
1066 WB Amsterdam, The Netherlands
Tel: +31-20-3306260
Fax: +31-20-3306261
Website: www.dn-engineering.nl
E-mail: [email protected]
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