In recent years, many housing retaining walls have been damaged or even collapsed by earthquakes in Japan. Among them, the damage to dry masonry retaining walls was prominent. Although there are reinforcement methods for retaining walls such as the earth nailing or the ground anchors, which are not suitable for housing retaining walls due to inadequate construction space. Other reinforcement method such as the root piles, on the other hand, straight piles and tilting piles are installed into sloping ground from the top of slope bank vertically so as easier to construct in narrow residential areas, hence widely applicable for housing retaining walls. But the problem of root piles is that the construction cost tends to be high for individual houses since many straight piles and tilting piles are used. From this background, we propose a reinforcement method in which only use tilting piles and connect the top of them to the top of the existing retaining wall to reduce construction cost by decreasing the number of reinforcing materials. This report aims to confirm how a distance between a retaining wall and a reinforcing material affects on the earthquake resistance by conducting centrifugal tilting tests using dry masonry retaining walls. The results show that connecting the top of the retaining wall to the top of the reinforcement allows the retaining wall retain higher soil pressure and the influence of reinforcement becomes increasing.

来源平台：NATURAL GEO-DISASTERS AND RESILIENCY, CREST 2023