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GATE Exam Questions - Engineering

Q1:

When a retaining wall moves away from the backfill, the pressure exerted on the wall is termed as

A passive earth pressure

B swelling pressure

C pore pressure

D active earth pressure

ANS:D - active earth pressure

The pressure is termed as the active earth pressure since the weight of the backfill is responsible for the movement of the wall. If the wall is smooth, the resultant pressure acts normal to the face of the wall.