In 2025, the hydrodynamics and structures teams of d2m Engineering supported the ETPO Group in defining the towing of two prefabricated elements – the spur and the harbour – to be installed at the front and rear of Fort Boyard in order to better protect it from wave action and erosion.

d2m Engineering applied its expertise on the behaviour of floating structures to define the means required for towing (vessel and equipment). A significant part of the study was carried out using the radiation-diffraction software HydroStar, to evaluate the global forces induced by waves on these atypical structures, their motions at sea, and potential flooding risks. Following this collaboration, the consortium was able to verify and, if necessary, adjust the design of the elements to secure towing and installation operations scheduled to begin next summer.

✨ Client: Département de la Charente-Maritime
📐 Client’s representative: Artelia ACE3
🏗️ Design & build consortium: Groupe ETPO – Architecture Patrimoine – BRL Ingénierie