A 50 cm diameter concrete pile has been driven into the groundnwhich is 16 m long. Average corrected SPT value for each layer is given in the adjacent figure. Find the allowable pile capacity by the following approaches.n
a.   IS: 2911 approach. (By correlating N" to φ'.)n
b.  Meyerhof's formula fro Driven Pilesn
c.   Point load by Vesic's approach and other considerations as per IS: 2911. (Shear Modulus of Dense sand, Gs = 15 MPa)

 

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c = 30 kN/m2 $ = 0 y = 18.0 kN/m 10 m d = 40 cm 18.5 m c = 50 kN/m? p = 0 y = 18.5 kN/m 6 m C, = 150 kN/m? 0 = 0 y = 19.0 kN/m³ 2.5 m Figure Prob. 15.11 c = 30 kN/m2 $ = 0 y = 18.0 kN/m 10 m d = 40 cm 18.5 m c = 50 kN/m? p = 0 y = 18.5 kN/m 6 m C, = 150 kN/m? 0 = 0 y = 19.0 kN/m³ 2.5 m Figure Prob. 15.11

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