A 0.3-m-square prestressed concrete pile is driven to a depth of 10 m at a site where sand soils exist and extend deep. Testing indicates the soil unit weight is 17 kN/m 3 and the angle of internal...

A 0.3-m-square prestressed concrete pile is driven to a depth of 10 m at a site where sand soils exist and extend deep. Testing indicates the soil unit weight is 17 kN/m³
and the angle of internal friction is 35°. Groundwater is below the depth of pile penetration. When load tested, the failure load is 1700 kN (the maximum safe load that should be assumed for the pile capacity, and taken as the test load shown on the load– settlement plot where large settlement begins to occur; a design load capacity would be obtained by applying a factor of safety to that maximum safe load). Assume the pile end bearing can be calculated from use of Equation 34 and Figure 32.