敷砂緩衝層の落石エネルギー吸収効果の評価を目的とした実規模落体衝突実験および二次元DEM解析

抄録

A rockfall protective soil embankment is said to be a rockfall countermeasure work with excellent workability and economy, but a performance design method has not yet been established. In this study, we conducted a full-scale weight-impact test in a sand cushion installed in the pocket back of the embankment. In addition, we performed a 2D-DEM analysis. From the test, it was shown that the energy absorption performance is improved by increasing the sand cushion layer thickness and the incident angle of the rockfall. In addition, 2D-DEM analysis showed the possibility of estimating the sand cushion thickness at which the increase in energy absorption performance converges.