Mobile Ocean Basing Systems:The Concrete Semi-Submersible Platform.

摘要

A study was made to investigate the feasibility of substituting concrete for steel as the primary construction material in a self-propelled semi-submersible platform. Of the configurations considered,eleven were determined to meet all of the study design criteria. It is concluded that the concept is feasible provided that: a deck not exceeding 375lbs per square foot dead weight is used,an underneath deck clearance of 30to 40feet above the mean water surface is acceptable,and columns and hulls (up to 60feet in outside diameter) having a wall thickness not exceeding 2feet are acceptable from considerations of formability and strength. The construction,assembly,launch and testing of a 1/10scale model twin hull semi-submersible platform is also described. The model was constructed to verify the findings of the self-propelled platform feasibility study,to demonstrate the feasibility of assembling available concrete products into a platform,to evaluate construction techniques and to study means of linking platform modules together to form large platforms. (Author)