補強土壁の耐震性に関する遠心模型実験(<小特集テーマ>飛躍する耐震技術 : 地盤工学の挑戦)

概要

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In this study, an attempt was made to discuss effects of geogrid properties on seismic stability of geogrid-reinforced soil walls. Centrifuge tilting and shaking tests were carried out to study the behavior of the reinforced soil walls. Properties of model geogrids, which were used in this study, were investigated by pullout tests. It was found that the stability of the reinforced soil wall was influenced by shape and stiffness of geogrid. The deformation of the reinforced area was especially limited by confining the area with the geogrid of high stiffness. Stability analyses were made by the two-wedge method. In the analyses, if the pullout resistance was reduced to be smaller than its maximum value considering the soil deformation to cause its failure consistent with geogrid stiffness, failure mode and the horizontal seismic coefficient at failure in the tilting test were well expressed by the analysis. Seismic coefficients to cause failure were much higher in the shaking table tests than in the tilting tests.
社団法人地盤工学会の論文
2003-02-01