Accession Number : ADA254144


Title :   Dredge Mooring Study Conceptual Design, Phase 1 Report


Descriptive Note : Final rept.


Corporate Author : SOFEC INC HOUSTON TX


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a254144.pdf


Report Date : May 1992


Pagination or Media Count : 83


Abstract : This report describes the conceptual design of a direct pump-out facility for Corps of Engineers hopper dredges. Operational conditions were a significant wave height of 6.0 ft, wind velocity of 30 knots, and a current velocity of 2 knots. The mooring system was designed for operation in a minimum depth of 30 ft and a maximum depth of 45 ft. The following operational criteria were also required for the mooring design: (a) transportation by truck or rail, (b) rapid assembly with little or no diver support, and (c) installation with a minimum of lift support. The report examines five alternatives: (a) a guyed tower, tension leg platform (TLP), (b) a single anchor mooring (SALM), (c) a three-leg catenary anchor leg mooring (CALM), and (d) a four-leg CALM. The four-leg CALM was selected for further study because it best met the operational criteria. To accommodate truck transport, a 28-ft-long, 11-ft 6-in.-high, 7-ft 6-in.-deep capsule buoy was designed. The entire system (buoy, fluid swivel, mooring table, and buoy piping) is capable of being transported on six flatbed trucks or a single 40- by 120-ft deck barge.


Descriptors :   *SHIPS , *DREDGING , *MOORING BUOYS , *MOORING , VELOCITY , OCEAN WAVES , RAILS , WIND , TOWERS , INSTALLATION , TRANSPORT , WIND VELOCITY , BARGES , DIVERS , HEIGHT , LIFT , PUMPS , ASSEMBLY , TRUCKS , ENGINEERS , FLUIDS , CATENARIES , ANCHORS , BUOYS , LEGS , SHIP DECKS , BUOYANCY , OPERATION , TENSION , PLATFORMS , DEPTH , FACILITIES , OCEAN CURRENTS , TRANSPORTATION


Subject Categories : Physical and Dynamic Oceanography
      Civil Engineering
      Marine Engineering


Distribution Statement : APPROVED FOR PUBLIC RELEASE