Civil Engineering MCQAE Level Civil Engineering
Rankine's passive earth pressure coefficient for cohesionless soil is:
Soil MechanicsSoil Mechanics and Foundation EngineeringHARD
Choose the correct answer
A
tan^2(45 + phi/2)
B
1 - sin phi
C
tan^2(45 - phi/2)
D
cos phi
Correct Answer
A. tan^2(45 + phi/2)
Why is this the answer?
Kp = (1 + sin phi)/(1 - sin phi) = tan^2(45 + phi/2).
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