Abstract
In order to estimate the active earth pressure and the earth pressure at rest against the walls during earthquake, the authors carried out the tests using a large scale vibrating soil bin in laboratory. The resultant force due to the oscillating earth pressure, its applied point and the angle of wall friction were measured during the wall displacement. The active earth pressure during earthquake and its applied point are derived based on the measured values of the earth pressure of which angle of wall friction is fully mobilized for the maximum inertia force. This equation can be applied to the vertical or inclined retaining walls with any backfill sands. The equations for earth pressure at rest are also derived.
