A footing 1 meter square carries a total load, including its own weight, of 59,130 𝑘𝑔. The base of the footing is at a depth of 1 m below the ground surface. The soil strata at the site consist of a layer of stiff saturated clay 27.5 m thick overlying dense sand. The average density of the clay is 1846 𝑘𝑔/𝑚3 . Given is Terzaghi’s ultimate bearing capacity for square footings: 𝑞u = 1.3𝑐𝑁c + 𝛾𝐷𝑓𝑁q + 0.40𝛾𝐵𝑁𝛾
a. Determine the gross foundation pressure.
b. Determine the overburden pressure.
c. Determine the ultimate beating capacity of the soil.
d. Assuming local shear failure, determine the ultimate bearing capacity of the soil.