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COWI was appointed by the contractor UTE Andrade Guitierrez-Ormas to review the overall port master plan and the design of the breakwater.COWI developed a new master plan that included a small craft harbour, provided greater offshore storage area and that located the breakwater on the reef rather than extending into deep water. The constructability of the breakwater is one of the projects governing factors. The chosen breakwater was a 19m high rubble mound with concrete CORE-LOC armour units.
2D flume tests were performed to check the stability of the preliminary designs. COWI developed three alternative port plans, each with phased construction to meet short, medium and long term demand. A navigation desk study was conducted to evaluate manoeuvring and ancillary craft requirements such as tugs, line boats and pilotage. Numerical modelling of wave disturbance was performed for each layout using the specialist software MIKE 21BW.
3D physical model tests confirmed the breakwater's stability, and assess wave disturbance at the main berth and in the small craft harbour. As part of the study, tests were performed with both open and closed quay structures based on feasibility designs produced by COWI.
COWI prepared detailed design of the breakwater, material specifications, construction methodology and cost estimates. In addition COWI prepared alternative designs for a sheet pile quay retaining 22 m and a piled quay with a suspended deck. All design works and construction methodology were adapted to utilise the existing plant on site.
Ole Juul JensenSenior Technical DirectorMarine, Coastal and Geotechnical EngineeringTel.: +45 5640 email@example.com
Development of a master plan Detailed design of breakwater Detailed design of reclaimed storage areaSupervision of 2D and 3D physical model testsProduction of material specificationsCost estimates