■Hm— 



20' water depth 1,200 tons 



340' water depth 6,510 tons 



Figure 34. Typical offshore 



platforms for shallow 

 and deep water. (From 

 Schmid, 1969.) 



24-foot-high building. The site is 

 located 27 miles south of Bermuda 

 in 193 feet of water. Sediments are 

 dense coral sands. The platform is 

 supported on four 30-inch-diameter 

 by 5/8-inch-thick steel piles drilled 

 approximately 50 feet into the sedi- 

 ment and then grouted. No foundation 

 problems have been reported. 



Khazzan Dubai I. Khazzan 

 Dubai I is a large submerged oil 

 storage tank with a capacity of 1/2 

 million barrels (Chicago Bridge and 

 Iron, 1969). Pumping and control 

 facilities extend above the water 

 surface. Its physical appearance is 

 that of an inverted funnel, 270 feet 

 in diameter and 205 feet high (Fig- 

 ure 36 and 37). Khazzan Dubai I 

 was installed in August 1969, 58 

 miles off the shore of Dubai in the 

 Arabian Gulf. The 30,000,000- 

 pound open-bottom structure rests 

 on a perimeter footing in 1 60 feet 

 of water. The perimeter footing 

 also contains guides for 30 anchor 

 piles spaced around the perimeter. 

 These 36-inch-diameter piles pene- 

 trate 90 feet into the seafloor. The 

 structure— foundation interface was 

 designed to withstand the scouring 

 action caused by a 3-knot bottom 

 current. No problems have been 

 reported to date. 



NSRDL Towers. The 



Naval Ship Research and Develop- 

 ment Laboratory in Panama City, 

 Florida, has operated two oceano- 

 graphic towers off the coast of 

 Florida since 1957 (Mine Defense 



58 



