Question

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

Hint:

Movement of retaining wall: \[ \boxed{ \begin{aligned} \text{Wall moves away} &\rightarrow \text{Active earth pressure} \text{Wall moves towards soil} &\rightarrow \text{Passive earth pressure} \text{No movement} &\rightarrow \text{Earth pressure at rest} \end{aligned} } \]

Answer 1

The Correct Option is D

Step 1: Recall the earth pressure conditions. When a retaining wall moves away from the backfill, the lateral earth pressure decreases until it reaches the active state.

Step 2: Identify the type of pressure. The pressure acting on the wall in this condition is called \[ \boxed{\text{Active Earth Pressure}.} \] Hence, \[ \boxed{(D)} \] is the correct answer.