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本文データは地盤工学会の許諾に基づき登録したものである多ユニットアーチカルバート盛土は盛土内に複数のカルバート構造が挿入された盛土で地震時における盛土地盤とカルバート構造の相互作用を検証し耐震性について検討する必要がある. 耐震性に関するこれまでの研究は数値解析を用いたものが主であり実験による検討は行われてこなかった. 本研究では連続するアーチカルバートの設置間隔ユニット間隔に注目し地震時にユニット間隔がアーチカルバートおよび周辺地盤に与える影響を明らかにすることを目的として動的遠心模型実験を実施した. 実験結果よりユニット間隔がアーチカルバートの高さの1/2までであればアーチカルバートや周辺地盤の挙動が大きく変化することはないことが確認された.Multi-arch culverts embankment is a new type of filling structure where several precast arch culverts are installed continuously in the direction of the road extension. The key point in design is to estimate the practical optimal installation interval between successive arch culverts and to clarify the interactive seismic behavior of filling material and culvert structure. A couple of researches have been done to investigate the earth-quake proof stability of multi-arch culverts embankment through numerical analysis only. In this study, dynamic centrifuge modeling test was carried out to clarify the mechanical influence of the installation intervals between consecutive arch culverts and the mechanical behavior of the surrounding soil during earthquake. From the experimental result, even if unit interval was brought close to 1/2 the height of arch culvert, it was found out that the behavior of arch culvert and the surrounding soil did not change greatly

Centrifuge model test on dynamic behavior of multi arch culverts embankment