A four-pile group consists of 12 in. square prestressed concrete piles 35 ft long. The piles are driven into an overconsolidated clay whose cohesion c u is 2,000 psf and whose soil unit weight is 115...

A four-pile group consists of 12 in. square prestressed concrete piles 35 ft long. The piles are driven into an overconsolidated clay whose cohesion c_u
is 2,000 psf and whose soil unit weight is 115 pcf. The pile spacing is diameters. The water table is at the ground surface. Using a factor of safety of 3, find the capacity of the pile group (α-method).