Hydraulic Design of Offshore Breakwater in Sergipe, Brazil

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by Otavio J. Sayao, Atria Engineering Hydraulics Inc, Mississauga, Canada,
Charles P. Fournier, Atria Engineering Hydraulics Inc, Mississauga, Canada,

Document Type: Proceeding Paper

Part of: Civil Engineering in the Oceans V:

Abstract: A Petrobras (Petroleo Brasileiro S.A.) marine terminal was recently constructed in Sergipe, Brazil (Figure 1). The offshore breakwater was initially designed in a conventional way, but alternative breakwater designs were developed based on the berm breakwater concept. The features of this concept were: relatively lower costs of construction; considerably lighter stones on the main armour when compared with a conventional two-stone armour design; and simpler construction procedures which enabled better control during construction. This paper describes the details of the hydraulic model testing carried out during the designing stages of the offshore breakwater. This design was developed by means of two separate physical model testing, firstly an alternative berm design and then a redesign due to changed geotechnical conditions. The testing program assisted in preparing a cost-effective, hydraulically stable breakwater structure, considering the armour stability, wave runup and overtopping and overall integrity of the structure.

Subject Headings: Hydraulic design | Breakwaters | Model tests | Hydraulic models | Offshore structures | Developing countries | Mathematical models | Structural stability | Water waves | Brazil | South America

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