Unclassified 



Socuntv Classifica 



DOCUMENT CONTROL DATA -R&D 



Naval Civil Engineering Laboratory 

 Port Hueneme, California 93043 



Unclassified 



DESIGN CONSIDERATIONS FOR SEAFLOOR FOUNDATIONS ON ROCK 



DESCRIPTIVE NOTES (Type of report and inclusive dates) 



Final: August 1971 - .Tnly 1Q7? 



iidd/e initial, las 



P. J. Valent 



June 1973 



25 



26 



-° YF38.535.002.01.005 



TN-1281 



I (Any other numbori 



Approved for public release; distribution unlimited 



Naval Facilities Engineering 

 Command 



The report identifies those rock foundation concepts most 

 likely to succeed. Existing rock foundations are first described, 

 previous peripheral studies are reviewed, and then a brief geologic 

 review is made of seafloor rock characteristics. It is concluded 

 that high resolution bathymetric information is essential to 

 successful structure emplacement. For those sites where the slope 

 is greater than ten degrees and the microrelief is in excess of 

 three feet, deadweight/clump foundation/anchors should be used; 

 otherwise the proper choice is a simple three-tined (legged) 

 foundation framework. 



DD/rr^Mva 



S/N 0101.607-6801 



Unclassified 



