Dredging Research Program. Dredge Mooring Study, Recommended Design, Phase 2 Report
Final rept. 16 Mar 1990-15 Sep 1991
SOFEC INC HOUSTON TX
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This report describes the design of a four-leg catenary anchor leg mooring and capsule buoy for the direct pump-out of Corps of Engineers hopper dredges. This is the second phase of a two-phase study. The campaign report phase I - conceptual design describes operational conditions and operational criteria and buoy dimensions 28 ft long by 11 ft 6 in. wide by 7 ft 6 in. high . This report provides detailed information on a structural calculations, b buoy stability, c piping system pressure loss analysis, d system timeresource analysis during transport, assembly, and installation, and e an example bid proposal specification for procurement. The system timeresource analysis section describes the amount of dock space and staging area required 250 ft by 300 ft of dock space, crane requirements a 50- to 60-ton crane, and time and personnel required for reach action. The report estimates the buoy could be assembled by five personnel and installed onsite by four personnel including a diver in 1 week or less 5 days minimum. With the addition of a second crane and second anchor handling vessel, the assembly and installation time could be reduced by 1 to 2 days. Direct pump-out Hopper dredges Single- point mooring buoy.
- Marine Engineering