As a first step of the important project that Bouygues Travaux Publics is developing in the Principality of Monaco, in September 2017 started in Marseille the preparation works for the construction of 18 concrete caissons reinforced with stainless steel rebars, that will act as a protection barrier against waves. This structure of caissons, 26 meters high and 10,000 tons in weight each, will be the basis for the extension of 6 hectares of a new district of the city to the sea.
The project has an estimated cost of two billion euros of which about half is budgeted for the construction of the necessary foundations for the new district of l'Anse du Portier which is expected to be completed by 2025, giving rise to about 60,000 m2 of new homes.
For the prefabrication of the caissons, a working area of 10,000 m2 has been set up on the dock of the maritime Port of Marseille where the assembly work on the reinforcements and the formwork for concrete walls is carried out, and an area of 32,000 m² in the water, where a floating dock 56 meters long, 50 meters wide and 27 meters high, dimensions of the equipment, which are a premiere in France, as claimed by the prestigious construction company.
The current phases of the project relating only to the submerged infrastructures should happen until 2020. The construction of the caissons is carried out in a large floating dock where the different concrete caissons are already being built, which once they are finished are towed to their location in Monaco, where the first ones are already arriving and being installed.
All the works are carried out with total respect for the environment, trying to cause minimal environmental impact, without damage to the surrounding biodiversity.
In the photographs you can see the assembly work of these stainless steel rebars, made by the company SENDIN, manufacturer of the reinforcements in its plant in Teruel, Spain, with stainless steel rebars type duplex EN 1.4362, supplied by Roldan SA, which with its high resistance to corrosion in the presence of seawater chlorides, they will be able to assure the great durability and sustainability that this type of Project requires.