Soil Mechanics and Foundation Engineering

Q1: Back fill with a sloping surface exerts a total active pressure Pa on the wall of height H and acts at

A H/4 above the base parallel to base

B H/2 above the base parallel to base

C H/3 above the base parallel to base

D H/5 above the base parallel to base.

ANS:C - H/3 above the base parallel to base

Same for passive case but valid in cohesion-less soil only. As pressure distribution is triangular, effective pressure acts at 1/3rd of total height from base.



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