In Expansive Soils, Drilled Piers Are Subjected to

Multiple Choice

In expansive soils, drilled piers are subjected to

A) an uplift force in the expansive region of the soil, which generally occurs in the upper soil layer.
B) an uplift force in the expansive region of the soil, which generally occurs well below the ground surface.
C) a downward force in the expansive region of the soil, which generally occurs well below the ground surface.
D) any one of the above, depending on the local geology.
E) none of the above.