Page 58 - Industrial Plants 2014

with SPMTs was towed away) and then lowered into
the water and connected to the skeleton of the
Syncrolift structure (figure 11 shows the sequence
of the operations).

Assembly of the catamaran
Fagioli contractor for the sea transport and
installation of the 12,000 ton caissons was Ing. E.
Mantovani S.p.a..
Due to the particular weather condition in the lagoon
of Venice and to the high and low tides, the summer
season was selected as the best period to perform
the operation. Fagioli was involved in the
transportation and sinking operations of the caissons
of Lido Treporti.
One of the most challenging aspects of the entire
Fig. 13 - Transport of the barge by means of SPMTs operation was the initial stage of designing a vessel
on which to transport the concrete caissons. After
working on a variety of 3D simulations Fagioli
eventually settled on building a tailor-made
catamaran vessel (Alfa), constructed by securing
two 190 ton river barges (39.2 m × 9.7 m × 3.82 m)
with a pair of steel cross-head beams.

In order to install the caisson Fagioli’s in-house
engineering came up with the idea to use two
group-owned barges (190 ton each) connected
together by two cross-head beams to build a
catamaran which could carry the caissons and
lowered them into the water. Following the approval
for the catamaran’s design by the Italian Marine
Registration Authority (RINA), both floating barges
were lifted at Cremona Port by means of Fagioli
gantry lifting system at group-owned quay area
(figure 12) in order to be moved by means of 2 × 6
Fig. 14 – Crosshead beams axle lines SPMTs to be modified onshore in a
storage area close to the port (figure 13).
In the meantime in another storage area Fagioli
prepared and assembled the crosshead beams
(figure 14). Three different sections were connected
together -including the strand jacks and power pack
systems, then they were transported by SPMTs to
the quay and loaded onto Ticino river barge (the
third barge involved in the project). The crosshead
beams were equipped with 4 strand jacks with
capacity of 180 t (figure 15). In addition other 12
strand jacks with individual lifting capacities ranging
from 50 to 300 ton (L50 and L300) were installed in
the two catamaran barges.
They left the storage area and were reloaded onto
the SPMTs and offloaded into the water by gantry
lifting system. The Ticino barge loaded with the
crosshead beams was towed into a shipyard
followed by the two group-owned river barges
Fig. 15 – Strand jacks which will compose the catamaran structure. In this

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