Civil Engineering MCQAE Level Civil Engineering

Rankine's active earth pressure coefficient for cohesionless soil is:

Soil MechanicsSoil Mechanics and Foundation EngineeringHARD

Choose the correct answer

tan^2(45 - phi/2)

1 + sin phi

1 - sin phi

tan^2(45 + phi/2)

A. tan^2(45 - phi/2)

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For level backfill and wall friction neglected, Ka = (1 - sin phi)/(1 + sin phi) = tan^2(45 - phi/2).

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