July 18th 2019 the belt made of 17 caissons was completed. Let's have a look from above. 18 juillet 2019, la ceinture composée de 17 caissons est achevée. Voici une vue aérienne. Copyright Bouygues TPMC

Portier Cove, Monaco’s new eco-district is designed as an extension of the Principality’s existing coastline from the Grimaldi Forum to the Formula One tunnel. Portier Cove marks the beginning of a sustainable redevelopment of the eastern territory of Monaco. The new eco-district offers an exclusively pedestrian surface with many elements: One hectare public park, Various public walkways, both along the coast and throughout the district, A port offering approximately 30 slips An underground public car park Buildings offering both office and retail space Luxury housing including multi-tenant buildings and private waterfront villas An extension of the Grimaldi Forum (convention centre). From inception, each element of Portier Cove has been designed with utmost concern for limiting infringements on the environment. From assessing and preparing the work site, to methods of construction, and sustainable practices for providing energy and utilities to the new buildings; each aspect has been carefully considered to achieve a sustainable and environmentally conscious method of delivering a project of this scale.

Pour réaliser l'infrastructure maritime de l'extension en mer de Monaco, Bouygues TP a utilisé des méthodes constructives inédites, pour limiter l'impact sur l'environnement. Ce film retrace les différentes étapes de ce chantier en mer, hors norme, depuis les premières études d'impact en 2014 jusqu'à la réalisation du terrain en novembre 2019.

In September 2018, the 18 reinforced concrete caissons began to be assembled in Monaco. It's been an amazing work ended in July 2019. Caissons act as a bulwark against the effects of swell by absorbing the waves that hit the new coastline in damping chambers. Trapezoidal in shape, each caisson is 28 metres wide, 27 metres high, weighs 10,000 tonnes and requires more than 3,800m3 of concrete for its construction.  The final approach manoeuvre to the designated location is carried out with two multicat vessels placed at the front and rear of the caisson. These ships have azimuthal propellers that rotate 360°. They are therefore extremely manoeuvrable, which allows to manually adjust the positioning of the caisson, and offers both stability and manoeuvrability. This is decisive for adjusting its position to the nearest centimetre. This is how the caisson is brought to its installation area, practically to its final location. At this stage, the caisson undergoes a first ballasting to bring it less than one metre above the backfill. The final installation is managed by six hydraulic winches placed on the caisson. Six people are on board to deploy six cables all around the caisson to be immersed, which are then docked on the adjacent caisson already laid. The caisson is equipped with topographic monitoring equipment. Like the driver and co-driver in a rally car, the topographical manager reads the data and gives, in real time, the position of the caisson to the operations manager who moves it by managing the tension of the cables. Once the caisson is definitively stabilised, balanced 50cm above its final position, it is completely ballasted to make it descend onto the backfill. In the event of a difference between the target position and the actual position, as the ballasting is liquid, all it takes is to discharge the ballast water from the caisson to return it to float and resume the operation. When the installation is validated, the water is replaced by 0/20 grain sand to make the caisson even more stable. This is the solid ballasting phase. To limit the risk of turbidity, the water is pumped out as solid ballasting progresses, respec- ting settling times to discharge clear water into the sea. After this operation, the final weight of the caisson is about 24,000 tonnes. So now you have all the explanation : let's watch the short movie !!! Copyright Bouygues TP MC

Découvrez les techniques de construction qui permettront à Bouygues Travaux Publics et plusieurs partenaires monégasques de développer un nouveau quartier de 6 hectares à Monaco. Ce nouveau quartier comportera notamment 60 000 m² de logements; des équipements publics, une extension du Grimaldi Forum, un parking public et d'un port d’animation; un parc végétalisé d'un hectare et d'une promenade littorale. Découvrez-en plus sur notre site https://www.bouygues-construction.com/ Suivez-nous également sur nos réseaux sociaux ! Facebook : https://www.facebook.com/Bouygues.Construction LinkedIn : https://www.linkedin.com/company/bouygues-construction Twitter : https://twitter.com/Bouygues_C Instagram : https://www.instagram.com/bouygues_construction/