a ten story building is to be constructed at a site where the water table is close to the ground surface .the foundation of the building will be supported on 30cm diametre pipe piles. the bottom of the pile cap will be at a depth of 1.0m below ground level. the soil investigation at the site and laboratory tests have provided the saturated unit weight, the shear strength values under undrained conditions, the corrected spt values, and the soil profile of the soil to a depth of 40m.