A performance summary of reinforced soil structures in the greater Los Angeles area after the Northridge earthquake

Abstract

This paper contains a summary of observations on segmental retaining walls and geogrid reinforced soil slopes which were subjected to the shaking of the Northridge earthquake. Eleven structures were visually examined for evidence of distress resulting from the earthquake. The structures highlighted provide a wide range of slope and wall systems using commercially available and widely marketed products. Specific details of two structures located within 35 km (22 miles) of the epicenter and subjected to strong ground motions are discussed. General comments on their construction and performance are provided. It is concluded from the survey that reinforced soil structures perform excellently even when subjected to seismic loads far in excess of those.for which they were designed.