remolded strength values in the bearing capacity equation predicts fairly 

 closely the observed depth of penetration. The strains imposed on the soil 

 mass as a result of the initial bearing capacity failure possibly caused remoli 

 ing and the reduction in soil strength. 



3/4-in. -diameter wire rope 

 four-part line 



height indicator 



to pile no. 15 



pile no. 1 



1-1/4-in.-diameter wire rope 



nstrument orientation line 

 1/4-in. -diameter rope) 



to pile no. 21 



Figure 22. Pop-Up Site mooring pile load test setup. (After Sutton, 1969. 



Submerged Petroleum Production Facility. The petroleum companies 

 maintain a few totally submerged structures. At least 20 production facilities 

 (flow-line manifolds, separators, heat treaters, oil storage tankage, gas compres- 

 sors, etc.) are currently in use on the seafloor. Most of these facilities utilize 

 mat foundation systems. Mat foundations were generally selected because of 

 the extremely weak soil conditions and because this type of foundation pro- 

 vides good resistance to scour effects. No foundation performance difficulties 

 have been reported. 



University of Miami Reflector and Cameras. The Institute of Marine 

 Science at the University of Miami has been using a reflector and various pad- 

 mounted cameras on the seafloor periodically for the past 5 years ( Kronengold, 

 1969). The reflector is 24 feet in diameter and is supported by three 12-inch- 

 diameter pipe piles driven to refusal (approximately 20 feet). The water depth 



37 



