1 A 5-m-diameter tank supported on the surfaceof a soil deposit imposes a bearing pressure of 225 kPa (225 kN/m 2 ). For a point 4 m below the tank base, compare the vertical stress increase due to...

1 A 5-m-diameter tank supported on the surfaceof a soil deposit imposes a bearing pressure of 225 kPa (225 kN/m²). For a point 4 m below the tank base, compare the vertical stress increase due to the tank loading when:

(a) the Westergaard conditions are assumed.

(b) the 60° approximation is assumed.

2 A circular foundation 12 ft in diameter imposes a pressure of 8,000 psf onto the soil. At the 12-ft depth, determine the vertical stress increase beneath the center and the edge of the loaded area, assuming:

(a) the Westergaard conditions apply.

(b) the 60° approximation.