Recently commissioned Peleke Nui floating dry dock (owner Marisco Ltd), was based on a hybrid design for a high-strength concrete pontoon with steel wing walls, taking advantage of the durable concrete for the pontoon and light weight steel for the wing walls. The durability, strength and stiffness of the concrete pontoon were further boosted with post-tensioned tendons.
The pontoon was designed with honeycombed internal structure (precast hollow cylinders interlinked in both directions) sandwiched between top & bottom deck slabs and enclosed by external hull walls. This floating dry dock was built in Asia, then towed to its destination in Oahu, Hawaii and outfitted by the owner, before it was commissioned for services.
The pontoon was designed with honeycombed internal structure (precast hollow cylinders interlinked in both directions) sandwiched between top & bottom deck slabs and enclosed by external hull walls. This floating dry dock was built in Asia, then towed to its destination in Oahu, Hawaii and outfitted by the owner, before it was commissioned for services.
Services
Our principal, Mr. Ben Zhou, served as lead structural engineer for analysis and design of this precast hangar structure. He also provided construction engineering support for erection sequence, shoring and shoring removal. Structural design features precast arch segments using folded plates resulting 55% savings in concrete and 40% savings in rebar in comparison with conventional design using cast-in-situ concrete.
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