A retaining wall 6 m high is to support a horizontal backfill. The upper 3m of backfill has a unit weight of 16 kN/m3 and angle of internal friction of 30°. Water table is located 3 m below the ground surface and the saturated unit weight of the soil below the water table is 19 kN/m3 with an angle of internal friction of 36°. Compute the Rankine active force per unit length of the wall assuming that the wall can yield sufficiently to develop active state. Compute the location of the resultant line of action from the bottom of the wall. Compute the moment due to the resultant active force.

Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A retaining wall 6 m high is to support a horizontal backfill. The upper 3m of backfill has a unit weight of 16 kN/m3 and angle of internal friction of 30°. Water table is located 3 m below the ground surface and the saturated unit weight of the soil below the water table is 19 kN/m3 with an angle of internal friction of 36°.

  1. Compute the Rankine active force per unit length of the wall assuming that the wall can yield sufficiently to develop active state.
  2. Compute the location of the resultant line of action from the bottom of the wall.
  3. Compute the moment due to the resultant active force.
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