DEEP-OCEAN PILE EMPLACEMENT SYSTEM: CONCEPT EVALUATION AND PRELIMINARY 

 DESIGN 



Technical Note N-1286 



YF38.535.004.0I.002 



by 



D. A. Raecke 



ABSTRACT 



A previous review of the state-of-the-art of seafloor pile emplace- 

 ment indicated that three types of mechanical systems could be developed 

 for deep-ocean seafloor pile emplacement. The systems are: vibratory 

 drivers, screw piles, and jack-in piles. Conceptual designs for 

 multiple-pile emplacement systems utilizing each of these mechanical 

 systems were developed and compared. The comparison showed that screw- 

 piles would be the most effective in meeting the given operating re- 

 quirements. A preliminary design for a pilot-model screw-pile emplace- 

 ment system is presented. 



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