A physical model study on reinforcement of a breakwater consisting of tetrapod artificial blocks

Akyol, Berkay
The breakwaters of a commercial port in the Western Black Sea were extensively damaged as a result of a major storm that hit on January 18–19, 2018. As an urgent precaution, the breakwaters were repaired based on pre-damaged sections, but there is still a need to reinforce these breakwaters to avoid damage in the case of potential future storms. Wind and wave climate studies were conducted using long-term wind data from various sources, and deep-sea wave characteristics were transformed to the nearshore in order to be used in the design of reinforcing sections of breakwaters. It was decided to place 48-ton antifer blocks on the armor layer with a packing density of 0.61, which was constructed by using 24-ton tetrapod blocks before the damage caused by a storm, in order to reinforce the breakwater sections. The reinforced sections were scaled and tested in the wave channel of the METU Civil Engineering Department Coastal and Ocean Engineering Laboratory under wave conditions with different water levels and various recurrence periods determined by taking the local wave climate into account. Measurements regarding the stability of the structure and wave overtopping were performed. It was observed that the cross-section reinforced with antifer blocks work efficiently based on the toe design, and the section was finalized by trying different toe design alternatives. It has been observed that the reinforced section is stable under design and overload wave conditions and wave overtopping is at acceptable levels.


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Citation Formats
B. Akyol, “A physical model study on reinforcement of a breakwater consisting of tetrapod artificial blocks,” M.S. - Master of Science, Middle East Technical University, 2022.