Question: 3. A 12-ft-tall concrete wall with a vertical back is to be backfilled with a clean sand that has a unit weight of 126

3. A 12-ft-tall concrete wall with a vertical back is to be

3. A 12-ft-tall concrete wall with a vertical back is to be backfilled with a clean sand that has a unit weight of 126 lb/ft, an effective friction angle of 36, and no cohesion. The ground behind the wall will be inclined at a slope of 2 horizontal to 1 vertical. Using Rankine's method, compute the normal and shear forces per foot acting on the back of the wall. Assume the wall moves sufficiently to develop the active condition in the soil.

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