Abstract
The retaining wall for falling stone using geosynthetics is, capable of countering steep topographic conditions and the large energy of falling stones. In the past, we conducted an experiment with vertically dropping a weight of 50kN from the height of 20 meters, as well as basic research on the evaluation of impact absorbing performance of this method and the mechanism. From this research, the retaining wall for falling stone is confirmed to show protective work and to be safe structure. However, the route and impact of the actual rock fall are complicated. Therefore, it is considered that the influence by falling stones is different from the case with vertically dropping a weight. In this study, a retaining wall for falling stone is built along the National Highway route 305. The route and impact of a falling stone and behavior of a retaining wall for falling stones was confirmed, by dropping actual stones on the slope face (the height 30 meters). A performance test on impact buffering materials was also conducted as a preliminary test. This paper presents the results of this falling stone experiment.
