DESIGN CONSIDERATIONS FOR SEAFLOOR FOUNDATIONS ON ROCK 



Technical Note N-1281 



YF38,535.002.01.005 



by 



P. J. Valent 



ABSTRACT 



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. 



Approved for public release; distribution unlimited. 



