The Marseilles Provence Métropole metropolitan area likes to redevelop the Harbour of Frioul to be able to use the whole plan of water and be able of receiving the next Cup of América. OCEANIDE participated with societies GTM, INTERNATIONAL DREDGING and IN VIVO on the appeal of offer in comprehension-realization for the works of protection of the harbour. The job of our society consisted in most cases à define dimensionnantes heaves has future works (concept innovating GREEN SEAWALL) to optimize these last with the help of numerical models. The validation of numerical results was accomplished from tries in channel with heave (physical model). Tries in channel allowed to validate the dimensionnement of the seawall adapted in the middle (measurements of cogitation and transmission and measurements of efforts were taken).