Page 78 - Industrial Plants

employed a dedicated barge for the transport of the
gates and the lifting structure provided with winches
positioned onto the barge for the mooring operations.
Fagioli was also in charge of the ballasting operations.

Tests executed before the
Operation activity

Fagioli executed several tests before the installation
entered into the operational stage. At Marghera port
the rotation of the movable towers of the gantry
Pict. 11 - lateral towers launching system were tested several times, taking into
considering all the dynamic forces involved.( pict. 15).
Another important test was executed offshore for the

Fagioli used a gantry lifting system to
position the beams into the water in
order to build up the syncrolift structure

mooring connections between the barge the posts and
the buoys. ( drawing 16) It was extremely relevant to
have a continuous stability of the barge considering
the weights of the gates and structures involved at
open sea. Last but not least, a loading test was
performed before the actual operations were executed,
checking with a remote computer the forces, eventual
unforeseeable movements, weights and ballast
procedures. ( pict. 17).

Installation of the mobile

barriers

The first step for the installation of the mobile gates
Pict. 12 - middle frame was the load out and sea transport of the gantry
launching system which was executed by means of
SPMTs onto the barge. After the ballast operations,
Fagioli slowly proceeded with the transport of the
structure onto the barge and the seafastening and
securing operations (pict. 18). The barge was pushed

The new structure was provided with a
movable tower system able to rotate 180
degrees

by No. 2 tugboats towards its final destination at
Malamocco. Once arrived at Malamocco, the barge
loaded with the gantry lifting system was placed in
position, over the 12,000 ton caissons (previously
lowered into the water by Fagioli catamaran) on top of
which the gate would be connected. The barge was
Pict. 13 - detail of the fishing beam moored and kept steady also by the tugboats. Once
checked the correct position, the gantry launching

IndustrIal Plants - May 2017
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