Polish built dock to facilitate Monaco offshore urban extension

Part of the general arrangement drawings for a new caisson construction floating dock
Part of the general arrangement drawings for a new caisson construction floating dock

As announced in August, as part of the Principality of Monaco’s Portier Cove land reclamation project, led by the Monegasque company, S.A.M. Anse du Portier, Bouygues Travaux Publics, a subsidiary of Bouygues Construction, launched works on the maritime infrastructure that will constitute the first phase of Monaco’s six-hectare offshore extension. The total value of the maritime infrastructure works is approximately €1 billion.The crucial part in the project will be played by a special floating dock serving as a building berth for concrete caissons to become the part of expanded land of Monaco.

The land expansion project with the outer caisson barrier to be built with help of Polish built special purpose floating dock
The land expansion project with the outer caisson barrier to be built with help of Polish built special purpose floating dock

The project will create six hectares of habitable space, meeting the highest ambitions with respect to sustainable development and environmental protection.

The project includes the construction of an eco-neighbourhood primarily consisting of housing (60,000 m²), public facilities, an extension to the Grimaldi Forum, a public car park, a marina with pedestrian wharves, a landscaped park, a seafront promenade and a shaded, planted walkway running the length of the Japanese Garden.

Caisson construction floating dock renderization
Caisson construction floating dock renderization

The construction technique to be used for the maritime infrastructure is a fill enclosed by a band of 18 trapezoid reinforced concrete caissons, 26 metres tall and weighing 10 000 tonnes each, equipped with absorption chambers. These precast units will help reduce breaches by strong swells and protect the exposed areas of the project.

These caissons will be built in a floating dock ordered at Gdynia based Crist SA yard.

According to agreement, signed by the shipyard on Septemper 2, 2016, the special purpose floating dock, yard no. NB56, is to be delivered in 9 months time – in June 2017.

Newbuilding no. NB56 from Crist will feature overall length of 56.4 m, 49.3 m beam, depth of 25.5 m, work deck area of 56.4 × 34.72 m and weight of over 3000 t.

The project will pay the closest attention to protecting the environment, preserving biodiversity – with the proximity of the Larvotto Reserve and the Spélugues coral reef – and respecting neighbouring areas, sites and landscapes. The eco-neighbourhood will qualify for a number of recognised environmental certifications, including HQE Aménagement, BREEAM and the Clean Ports label.

rel (CristBouygues Construction, Principality of Monaco), PBS

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