Abstract

The purpose of this paper is to describe the design and construction of reinforced cantilevered retaining walls. Two case studies of retaining wall failures are presented. For the first case, the wall failed as a result of a reduction in lateral support. In the second case, the wall was damaged as a result of the increase in lateral pressure from the Northridge earthquake. A cantilevered retaining wall must have an adequate factor of safety for sliding and overturning, and have a footing bearing pressure less than the allowable bearing pressure. Two other common reasons for the failure of cantilevered retaining walls are using on-site soil and generating excess pressures during backfill compaction. Using on-site soil may lead to failure because the soil may not have the shear strength or permeability properties assumed during the wall design stage. To prevent damage to the wall from excess compaction pressures, lightweight hand-operated equipment or bobcats should be used for backfill compaction.

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