SAMPLE PROBLEMS 



Two sample problems are provided in this section as a guide. One 

 problem is for an anchor in cohesive soil and the other for an anchor in 

 cohesionless soil. Each step in the solution is referenced to the appro- 

 priate paragraph of this report. 



7.1 COHESIVE SOIL 



A CEL 20K propellant- embedded anchor with a 0.9 x 0.9-meter 

 (3 x 3-ft) clay fluke is to be installed 1,100 km (700 miles) east of the 

 Hawaiian Islands at a water depth of 5,500 meters (18,000 ft). It will 

 be used to moor a subsurface buoy about 60 meters (200 ft) below the 

 water surface for a period of several years. The installation procedure 

 will result in a single impulse load of between 0.01 and 0.1 second 

 duration. Cyclic loading will not be applied to the anchor. The 

 remoteness of the site precludes a site survey. What is the maximum 

 allowable lift of the buoy assuming a neutrally buoyant line is used in 

 the mooring? What is the holding capacity for an impulse loading? 



7.1.1 Site Properties 



Because a site survey cannot be conducted, the procedures of 

 paragraph 2.3 (specifically paragraph 2.3.4(2)) are utilized to estimate 

 soil properties. 



The site is in the deep ocean. The calcite compensation depth 

 (CCD) needs to be checked to determine whether the soil is pelagic clay 

 or calcareous ooze. From Figure 2-2, the CCD is found to be 4.5 km 



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