Discussion
Coulomb's theory of earth pressure is based on ________.
Answer: C
Coulomb's theory is based on the Wedge theory.
Coulomb (1776) treated the soil behind a retaining wall as a rigid wedge that slides on a plane failure surface. By considering the equilibrium of this wedge, including wall friction, and finding the most critical plane, he obtained the active or passive earth pressure.
Rankine's theory is the one based on the plastic equilibrium of the soil mass, not elasticity. Coulomb's method is a rational analysis, not a set of empirical rules.
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