Unclassified 



Socunlv ClassificalK 



DOCUMENT CONTROL DATA R&D 



I oi title, body ot »bslrfirt aitd indexui^ unnot/ttion nru.sf 6c entered v 



Naval Civil Engineering Laboratory 

 Port Hueneme, California 93043 



Unclassified 



UNAIDED BREAKOUT OF PARTIALLY EMBEDDED OBJECTS FROM COHESIVE 

 SEAFLOOR SOILS 



. DESCRIPTIVE NOTES f Type o i repot t an d inc lua i ve dm te »} 



Final; 1965- 1971 



. AUTHOR(S) (T/rsr name, middle initial, latt name) 



H. J. Lee 



February 1972 



OF PAGES 7b, 



51 



14 



h TOR'S REPOR 



NO YF 38.535.002.01.009 



TR-755 



96. OTHEM REPORT NO(9) (Any othmr number* th»t may bo amslgnod 



OlSTRiaUTION 9TATCMEN 



Approved for public release; distribution unlimited. 



EMENTARV NOTES 



Naval Facilities Engineering Command 

 Washington, D. C. 20390 



The Naval Civil Engineering Laboratory has conducted field and laboratory tests to 

 investigate the effort required to remove partially embedded objects from cohesive seafloor soils. 

 This work is intended to aid in proper selection of elements for Navy salvage and rescue operations. 

 This report presents the results of the tests and an analysis of the results. Procedures are given for 

 use by field engineers in predicting forces required to remove objects immediately and in estimating 

 times required when lesser forces are applied. The accuracy of the force prediction procedure is 

 about plus or minus 50%; the accuracy of the time prediction procedure is about plus or minus 100%. 

 These accuracies are comparable to those usually attainable with other time-dependent soil mechanics 

 problems and should be acceptable for typical object retrieval operations. 



DD 



.,1473 



(PAGE 1) 



S/N 0101.807-6801 



Unclassified 



Security Classification 



