In the cases of active and passive lateral earth pressure acting on a retaining wall, the failure zone is typically bounded by the failure surface of the retained soil mass and which of the following points?

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The failure zone is created by active and passive lateral earth pressure acting on a retaining wall is typically bounded by the failure surface of the retained soil mass and the back face of the wall. The failure surface of the retained soil mass is along the plane at which the soil has attained limiting equilibrium. The distribution of active and passive lateral pressures is assumed to be triangular, and the impact of the pressures can be calculated using Coulomb's method.

In the Cases of Active and Passive Lateral Earth Pressure