A driven closed-ended pile, circular in cross section, is shown in Figure P12.7. Calculate the following.

a. The ultimate point load using Meyerhof’s procedure.

b. The ultimate point load using Vesic’s procedure. Take I_rr = 50.

c. An approximate ultimate point load on the basis of parts (a) and (b).

d. The ultimate frictional resistance Q_s. [Use Eqs. (12.42) through (12.44), and take K = 1.4 and δ' = 0.6ϕ'.]

e. The allowable load of the pile (use FS = 4).

Eq. (12.42)

L' ≈ 15D

Eq. (12.44)

f = f_z=L'

Figure P12.7.

15.7 kN/m3 o' = 32 c' = 0 3 m %3D %3D Groundwater table Ysat = 18.2 kN/m3 o' = 32 c' = 0 %3D 3 m 19.2 kN/m3 Ysat o' = 40 c' = 0 %3D 15 m 381 mm