5.1.2 Cohesionless Soil 



For cohesionless soil (c = 0), the short-term static holding capa- 

 city can be calculated using Equation 1-1 in this form: 



F = A y b DN (0.84+ 0.16 B/L) (5-2) 



where F = short-term static holding capacity 



A = projected fluke area 



y, = buoyant unit soil weight 



D = depth of fluke embedment 



N = holding capacity factors for drained or frictional 

 condition 



B = fluke width or diameter 



L = fluke length or diameter 



The values to use for N are given as a function of relative embedment 

 depth, D/B, and soil friction angle, <)>, in Figure 5-2. A, B, and L 

 are anchor fluke parameters. D is the depth from the soil surface to 

 the anchor fluke. The soil parameters should be selected in accordance 

 with the procedures provided in Chapter 2. 



5.2 LONG-TERM STATIC LOADING 



Long-term static holding capacity is the largest load an anchor 

 fluke can sustain for a long period of time. Loading a fluke stresses 

 the soil and, thereby, generates excess porewater pressure. The 

 long-term condition is reached when the excess porewater pressure has 

 dissipated. The time for this to occur in a particular soil is a function 

 of the soil's permeability and other characteristics. In cohesionless 

 materials, this drainage occurs almost immediately, and no distinction is 

 made between long-term and short-term holding capacity. In cohesive 



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