Problem

A 600 mm square prestressed concrete pile is to be driven to a depth of 20.0 m into the fo...

A 600 mm square prestressed concrete pile is to be driven to a depth of 20.0 m into the following soil profile:

Depth (m)

Soil Classification

Unit Weight, γ (kN/m3)

Undrained Shear Strength, Su(kPa)

0–3.0

Silty clay

17.0

50

3.0–10.2

Clayey silt

17.5

55

10.2–12.0

Clay

17.8

80

12.0–22.0

Clay

18.1

120

The groundwater table is at a depth of 5 ft. Using the Randolph and Murphy method with a factor of safety of 3.0, compute the ASD allowable downward load capacity, Pa.

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