Desi g n Problem Freliminary Desi gn 



func no : 

 CcjIcuIoIccJ by: 

 Ciiockcd by : 



/02 oH3d 

 J. R W. 



Dote 



ZO Mar. 73 



Quay Wall Caisson (cont.) 

 Sliding (coni.) 



5^ = - Z 94^4 4 = -2. 944 (SC) = - 10G. O k/ft 

 £^ = IMl'13 -lOG.O = 7/.^ k/ft 

 Hor/zontal Force to Initiate Sliding 



Fh^ juF^ = 0.40(7I4) = 21.4 k/ft 



Since the actual net horizontal force 

 IS only fok/ft., caisson will not slide. 



Caisson SfQbili fL f after 3ackf tilin g 



Assumptions: 



/. Mo }N0\/e action. (Protected by 

 breQk\Nater) 



2. Voids Filled \N'ifti dry sand. 



3. Minimum water level at ~3.0 MLN. 



4. Surcharge of Zft on fill, (dry sand) 



Overturning Seav\/ord 

 Lc 



elev. +ZO 



\N 



voids filled 

 with dry 

 sand 



uplift 

 13 



: i y\\\\ I 



f Zft surc harge 



drained sand ^^^^ 



'~'-'\ 



saturated 

 nil 

 (sand) 



X 



elev. =-4o.o 



8-102 



