L = 203.98 



a 



L = 14.28 m 

 a 



R = 299.11 (14.28) 



= 4271.3 kN 



Required width of caisson = L = 14.28 meters, 

 d. Soil Bearing Pressure. 



TRIANGULAR PRESSURE DISTRIBUTION, 



AREA UNDER PRESSURE 

 DISTRIBUTION = R^ 



Rv = VERTICAL COMPONENT OF REACTION R 



R = 



V 



P L 



max o 



2 R 



max 



V_l (4271.3) ^ 353^22 kN/m2 



14.28 



(1) Sliding. 



Summation of horizontal forces; 



^E-'h-\ =0 



R„ = 2009.034 - 618.02 

 ti 



R„ = 1391.014 kN/m 

 ti 



Vertical forces: 



R = 4271.3 kN/m 



1 



R„ = horizontal component of reaction R. 



'Factor of safety against sliding should be 2: hence F^ > 2 R^ for safe 

 design. Caisson should be widened. 



8-84 



