Browsing by Author "Green, Alexander Malcolm"
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- ItemGeometric Optimisation of Earth Retaining Quay Walls for the Marine Environment through the use of Ground Anchors(Stellenbosch : Stellenbosch University, 2018-12) Green, Alexander Malcolm; Strasheim, J A vB; Stellenbosch University. Faculty of Engineering. Dept. of Civil Engineering.ENGLISH ABSTRACT: Quay walls which accommodate the docking of marine vessels form an important part of port structures. This thesis focuses on the optimisation of precast concrete cantilever type quay walls with the incorporation of a tensioned ground anchor. With the use of this anchor concept the mass of these precast cantilever type quay walls can be optimised. A case study of the Port of Saldanha, South Africa was used to provide design parameters such as structural loading, geotechnical information and a comparative as built design for input into the quay wall optimisation process. The optimisation process consists of global structural system stability checks using working state design principles followed by the structural design of the precast concrete element at the ultimate limit state. A layout with a mass of 183 tons compared with the as built structure having a mass of 330 tons was determined for the equivalent 5.9m length of quay wall precast component. The required anchor force for this layout was 2752kN. This anchor force can be accommodated with a twin ground anchor system using ASDO500 M80/60 ground anchor bars manufactured by Anker Schroeder. The mass reduction obtained will allow for the use of smaller and more readily available marine hoisting plant during the construction phase, and can markedly decrease cost of the overall port development project.