Evaluation of extent of damage in geogrid reinforced soil walls subjected to earthquakes

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In this study, evaluation of degree of damage in GRSW is discussed. Shear strain of backfill material in the reinforced area is evaluated from the horizontal displacement of the wall. Then, occurrence of the slip line is decided based on the simple plastic theory. Since the past studies show that seismic stability of the GRSW depends upon the pullout resistance between geogrid and backfill material after the generation of slip line in the backfill, seismic stability of the GRSW having slip line in the reinforced area is evaluated from the results of the pullout test. Finally, the validity of the proposed method was verified with results of some centrifuge shaking table tests.