A rigid foundation is subjected to a vertical column load, P =355kN as shown in the figure11.43 . Estimate the elastic settlement due to the net applied pressure,

 

SOLUTION:

) *  *  *

is the  applied load = 355kN 

is the shape factor =  +  *

 =  for the center of foundation and B is for the corner of foundation.

 =

Lm =

= 355 kN

= 0.4

 = 13500 kN/

 =  =

 = 1.5m

=  =

= 4 m        

From the table 11.1

 = the average of  = 1.5

 =

0.454               

From the table 11.2

 

 

 =  +  *

 = 0.454 +  * 0.054

 = 0.472

 = ( ,  , )

 =  = 0.75 m

Taking average 1 and 2 from table 11.3

 = 0.4

 = 1.5 m                   

Taking average of

 =  = 0.4

Taking average of

=  = 1.5

=  = 0.73 = 0.74

 = 0.74

 

Putting all these values in the formula

) *  *  *

) *  *  * 0.69

 

 22.24 mm