l-c = ? 



BAY SIDE 

 SWL ELEVATION 1.5m 



.^^ 



ELEVATION 8.5m 



■A 



•>.:4- 



■■a'.' 



•- VOIDS 

 (FILLED 

 WITH 

 SAND)-* 



-^ 



.A.>-: 





';^; 





SEAWARD SIDE 

 (PROTECTED) 



NO WAVE 

 ACTION 



jC 



ELEVATION -12.0m 



COMPACT SANDY BOTTOM 



For preliminary design, assume 75 percent voids filled with seawater and 



3 

 unit weight of water w = 10.05 kN/m 



a. Nonbreaking Wave Forces on Caisson (see Ch. 7, Sec. 111,2) . 



(1) Incident Wave Height: H- = 6 m . 



(2) Wave Period: T^ = 7.78 s . 



(3) Structure Reflection Coefficient: x = 1*0 



(4) Depth: 



dg = 13.5 m 



«i 



gT 



(9.806)(7.78)' 

 6 



= 0.0101 



13.5 



= 0.444 



(5) Height of Orbit Center Above SWL (see Fig. 7-90). 



— = 0.37 

 % 



h^ = 0.40 [h^I = 0.37(6) = 2.22 m 



8-76 



