Pseudo-Dynamic Evolution of Seismic Passive Earth Force and Pressure Behind Retaining Wall

Pseudo-Dynamic Evolution of Seismic Passive Earth Force and Pressure Behind Retaining Wall

Sima Ghosh (NIT Agartala, Tripura, India)
Copyright: © 2011 |Pages: 15
DOI: 10.4018/jgee.2011070101
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Abstract

This paper presents a detailed study on the seismic passive earth pressure behind a non-vertical cantilever retaining wall supporting inclined backfill, using pseudo-dynamic method. In addition to the consideration of wall and backfill surface inclination, the soil friction angle, wall friction angle, and both horizontal and vertical seismic coefficients are taken into account. From the obtained results, a non-linear variation of passive earth pressure along the height of the wall is observed. The results compare well with the existing values in research.
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2. Method Of Analysis

A rigid, non-vertical, cantilever retaining wall of height H is placed with a dry, cohesionless, inclined backfill of unit weight γ as shown in Figure 1. The wall face AB on the backfill side is inclined at an angle θ with the vertical and has a wall friction angle δ. The objective is to determine the passive resistance and distribution of passive earth pressure per unit length of the wall in the presence of horizontal and vertical earthquake acceleration khg and kvg respectively where, g is the acceleration due to gravity. Considering the planar failure surface BC at an angle α with horizontal, all the forces acting on the retaining wall during passive state of equilibrium is shown in Figure 1.

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