Coulomb's theory of lateral earth pressure accounts for:
Choose the correct answer
Wall friction only
Wall friction and backfill surcharge but not irregular backfill slope
Wall friction, backfill slope, and wall inclination
Only cohesionless soils with horizontal backfill
Correct Answer
C. Wall friction, backfill slope, and wall inclination
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Coulomb's wedge theory is more general than Rankine's and accounts for: (i) wall friction (δ), (ii) slope of backfill (i), and (iii) inclination of wall (α). It uses a planar failure surface and force equilibrium of the wedge.
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