Rubble mound breakwater design example3/16/2024 ![]() In September 2013, the Office National de L Electricité et de l Eau Potable (ONEE - the Moroccan national electricity and water utility) and Safi Energy Company entered into a 30-year "Power Purchase Agreement" for the Safi coal-fired power project. Keywords: rubble-mound breakwater toe berm stability, very shallow water, physical model tests, Van Der Meer s formula INTRODUCTION Project location and background GDF Suez, Nareva and Mitsui form the Safi Energy Company, which is in charge of building and operating the new Safi power plant. They are more usually used at the toe of vertical caissons. These blocks reduced the antistabilizing pressure difference between the top and bottom of the blocks (Tanimoto et al., 1996) and drag force due to the considerable current. It was hence decided to reinforce the toe with artificial blocks and to use rectangular concrete blocks with holes. Given the site conditions and the construction methods, the usual solutions consisting in increasing the rock size and/or placing the toe berm in a trench had to be ruled out. The physical model tests demonstrated that the toe berm (6t rocks, 3:1 slope) was not stable at key singular locations, namely roundheads and roots, where direct impacts of breaking waves caused severe damage. Due to the very shallow water conditions, the toe design was verified through physical model tests (2D and 3D) in ARTELIA s hydraulics laboratory located in Pont-de-Claix, near Grenoble (France). The initial toe berm design was based on Van Der Meer s empirical formula (1998). The toe berm is a key design feature of rubble-mound breakwaters built in breaking conditions, since it helps to support the armour layer and protect the structure from potential scour-induced damage. ARTELIA Eau & Environnement was appointed by the Contractor to perform the hydraulic design review of the rubble-mound breakwaters protecting the intake and outfall. 1 TOE BERM DESIGN FOR RUBBLE-MOUND BREAKWATERS: EXAMPLE OF THE SAFI POWER PLANT PROJECT COUTOS Marie 1, HONG Kyung-Wook 2 DAEWOO E&C (Engineering & Construction) is in charge constructing a new 1320 MW coal-fired power plant located approximately 15 km south-west of the city of Safi in Morocco. ![]()
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