Coefficient of friction: 



y = 0.40 



(2) Horizontal Force to Initiate Sliding. 



^H=^\ 



F„ = 0.40 (4271.3) = 1708.52 kN/m 



n 



^H> h 



Caisson will not slide. 



e. Summary . The preceding calculations illustrate the types of 

 calculations required to determine the stability of the proposed quay wall. 

 Many additional loading conditions also require investigation, as do the 

 foundation and soil conditions. Field investigations to determine soil 

 conditions are required, in addition to hydraulic model studies to determine 

 wave effects on the proposed island. 



V. COMPUTATION OF POTENTIAL LONGSHORE TRANSPORT 

 (see Ch. 4, Sec. V) 



Using the hindcast deepwater wave data from Table 8-4, the net and gross 

 potential sand transport rates will be estimated for the beaches south of 

 Ocean City, Maryland (see Fig. 8-31). Assume refraction is by straight, 

 parallel bottom contours. 



Azimuth of shoreline = 20 degrees 

 1. Deepwater Wave Angle (a j . The angle the wave crest makes with the 



shoreline (equal to the angle the wave ray makes with normal to shoreline) is 

 shown in the following tabulation: 



8-85 



