ABSTRACT
Many masonry walls have been constructed on slope along the Japanese railway. These walls are used as a surface protection on cut slopes and as retaining walls on embankments. Since these masonry walls are more brittle than the concrete retaining walls, the risk of collapse of masonry walls due to earthquake is high. For this reason, in order to improve railway safety against earthquakes, the reinforcement of masonry walls is required. Therefore, we develop a seismic reinforcement method for masonry walls and confirmed its effectiveness by centrifuge model experiments. The reinforcement method mainly consists of the penetration of the nailing into the slope and the solidification of the gravel backfill by the grout injection. As the result of the shake table experiments in the centrifuge, we confirm that the reinforced masonry wall does not collapse even under the shaking with a maximum acceleration greater than 1000 gal.
