It should be emphasized that holding capacities derived from these 

 plotted curves are long-term static and do not account for such things 

 as effects of creep and repetitive loading. A thorough understanding of 

 the behavior of soils under various types of loading is necessary 

 input into the holding capacity equations. These loading parameters 

 are presently under investigation at NCEL and at the University of 

 Massachusetts (NCEL Contract). 



The holding capacity-depth relationships have not yet been wholly 

 verified by full-scale tests; however, they are believed to be 

 somewhat conservative due to the assumptions used in their development. 

 In addition, adequate use of these or any other logically developed 

 relationships between holding capacity and depth is entirely dependnet 

 upon the ability to determine in-situ engineering properties of soils. 



A prime consideration in further development of the SUPSALV 

 anchor is to decrease the keying distance for the anchor flukes. 

 Presently, the sand fluke requires a distance at least equal to 2 times 

 its length to key. Figure B-3 indicates that a depth of 12 feet is 

 required to achieve sufficient holding capacities in sand. However, 

 this would require an initial penetration of 18 to 20 feet which is 

 presently not likely to be achieved in a medium dense sand with the 

 existing sand fluke. Research is on-going at NCEL to optimize the 

 anchor-fluke projectile. 



38 



