EVALUATION OF BOTTOM BREAKOUT REDUCTION METHODS

Breakout forces present problems in making retrieval lifts by increasing the lift force requirement, creating a dynamic snap-load in the lifting line, and causing control difficulty during ascent. Three breakout reduction methods are tested using small submersible-sized objects. These methods are: mud suction tubes, water flooding, and air jetting. The results showed that all methods were effective at reducing the breakout force to less than 10% of the wet weight of the object. Diver handling techniques are evaluated and described. Also, a review of three methods which calculate breakout forces is presented.

• Corporate Authors:

  Naval Civil Engineering Laboratory

  Port Hueneme, CA  United States 
• Authors:
  • Vaudrey, K D
• Publication Date: 1972-4

Media Info

• Pagination: 29 p.

Subject/Index Terms

• TRT Terms: Force; Loading and unloading; Salvage
• Old TRIS Terms: Breakout forces; Snap loading
• Subject Areas: Environment; Marine Transportation;

Filing Info

• Accession Number: 00035666
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: NCEL-TN-1227 Final Rp
• Files: TRIS
• Created Date: Oct 27 1972 12:00AM