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Sinclair Knight Merz carried out the concept and detailed design, and construction management (EPCM services), for BHP Minerals’ mineral concentrates export wharf.
The scope of work included all the offshore works for the Cannington project including the shiploader, materials handling plant, wharf, access jetty, dredging and navigational aids.
The preliminary design phase included the management of geotechnical investigations, coastal modelling, vessel response analysis and vessel simulation exercises. It included the development of ship unloading concepts to ensure that the facility could be converted to accommodate an import facility at a later date.
A Project Alliance between Sinclair Knight Merz, the principal (BHP Minerals) and contractors Thiess and EMR Gilbert, was formed to deliver the project. Sinclair Knight Merz provided some of the construction management team members and an integrated design team for constructability issues and temporary works design.
In conjunction with the marine contractors, the firm developed a system for the use of precast shell elements for all the structural members in the wharf, jetty and dolphins. This negated the need for installing and removing formwork over water. Special provisions were developed to support the precast elements on the structural piles, to shorten the construction cycle time. Insitu reinforced concrete was placed in the precast shells to provide a homogeneous structure.