A retaining wall 6m. high is to support a horizontal backfill. The upper 3m. of backfill has a unit weight of 16kN/m3, angle of friction of 30 degree. Water table is located 3m. below the ground surface and the saturated unit weight of the soil below the water tale is 19kN/m3 with an angle of friction of 36 degree. It carries a uniform surcharge of 25 kN/m2. 1. Compute the Rankine active force per unit length of the wall assuming that the wall can yeild sufficientlyto 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.

Principles of Geotechnical Engineering (MindTap Course List)
9th Edition
ISBN:9781305970939
Author:Braja M. Das, Khaled Sobhan
Publisher:Braja M. Das, Khaled Sobhan
Chapter13: Lateral Earth Pressure: At-rest, Rankine, And Coulomb
Section: Chapter Questions
Problem 13.8P
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A retaining wall 6m. high is to support a horizontal backfill. The upper 3m. of backfill has a unit weight of 16kN/m3, angle of friction of 30 degree. Water table is located 3m. below the ground surface and the saturated unit weight of the soil below the water tale is 19kN/m3 with an angle of friction of 36 degree. It carries a uniform surcharge of 25 kN/m2.

1. Compute the Rankine active force per unit length of the wall assuming that the wall can yeild sufficientlyto 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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