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FAGIOLI

Installation of a 12,000 ton

pylon foundation

Fagioli was contracted by SBJV, a Danish Joint Ven-
ture led by Itinera, for the transport and installation
of the new Storstrøm bridge which is going to be
built in Denmark between Falster and Masnedo.
This challenging project includes the installation of
foundation plinths weighing up to 2,500 ton, girders
4,000t, pile sections, 250t and plinth 1C, the largest
foundation with a weight of about 12,000 ton.
Fagioli executed the skidded load out operation of a
12,000 ton pylon foundation by means of n.24 skid
shoes each capable of 1000 ton and a semisubmer-
sible barge. The huge concrete block (42 m long, 34
m wide and 22.7 m high), will be the bottom section
of the 106 meter high pylon, which will stand in the
middle of the Danish bridge and carry the suspen-
sion lines for the central girders. Back in May 2020,
work began on casting the huge concrete block,
which has a total of 26 inner chambers, which will
initially be filled with water to place it on the sea-
bed. A temporary steel structure installed (also by
Fagioli onshore team with use of 650t crawler crane
and SPMTs) is set up on the foundation, it has been
design to increase stability and guarantee a work
platform for the job to come after plinth sinking. The
semisubmersible barge, with 27 ballast tanks, was
equipped with a project specific grillage set. In col-
laboration with barge owner (BOA) the loadout and

float off operations developed by Fagioli team suc-
ceeded as per plans. The submersion of the barge,
to allow the concrete plinth to float, takes place by
filling the many ballast tanks in the barge with wa-
ter so that it submerge until touching the seabed
at 21,5m. Once afloat the block has been towed
out to the final position of the plinth itself and mo-
ored securely to pre-laid gravity anchors. The pylon
foundation was skidded by 24 skid shoes onto the
barge BB 34 (140x36x8,5m), an overall operation
in a series of critical path phases lasting 5 days in
good weather conditions last October.

www.fagioli.com/it

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