📋 Tender Overview
- The construction of the new progress: the tenth mega cassone of the dam, created by the Pergenova Breakwater Consortium led by Webuild on behalf of the Port System Authority of the Western Ligurian Sea, was built and sank. In recent days, the finish line of the construction of over 34,000 gravel columns on the seabed off the city, equal to 406,000 linear meters, well over half of the total length of those envisaged by the project has also been reached.
The prefabrication activities of the even larger dimensions, up to 67 meters long, with a width of up to 35 meters and a variable height of up to 33 meters, will also start shortly, which will be made inside the Tronds Barge 33 prefabrication basin in Vado Ligure.
Milestone significant is the achievement of the first half of the columns in the open sea, at a depth between 25 and 50 meters. Up to 13.5 meters high and with a diameter of 110 cm, the columns are fundamental structures to improve the stability of the cassons and the settlement of the land on which the dam will rest. They are made in the layer created by the over 2.2 million tons of gravel laid to date on the seabed and mostly coming from Spain.
The technique used for the realization of these columns is that of the Top-Feed Method, which uses eight, instruments in the shape of needles over 20 meters long, fueled by jets of water and pressure under pressure to break and penetrate the natural soil. I are dropped from above and progressively inserted in the seabed, creating holes inside which, through vibrations, the gravel falls which then is finally compacted. The operations currently take place with three pontoni, one of which exceeds 150 meters in length, equipped with cranes up to 40 meters high.
The project, technically very challenging, currently involves over 450 people in total, between direct staff and third parties.
The new Foranea dam represents a crucial infrastructure for the future of the port of Genoa: it will allow access to ships up to 400 meters in length and will strengthen the role of the Ligurian airport inside the Rhine-Alps corridor of the TEN-T network, in synergy with the unique third project of the Giovi-Nodo of Genoa, also made by Webuild. A work that enhances the competitiveness of the port by paying great attention to environmental sustainability.
