2001 Volume 16 Pages 141-146
In the coastal areas of the Sea of Japan, there are many places that have high risk of rock fall because these areas have steep topographic features and soft soils as well as severe weather conditions. The authors planned to use a reinforced earth wall using geosynthetics as a retaining method for falling stones, capable of countering these topographic conditions and the large energy of falling stones. This retaining wall method for falling stones is a technique to receive falling stones on the top of a reinforced soil wall, and the impact of falling stones are absorbed by banking materials and a geogrid. In the past, we conducted an experiment to vertically drop 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.
A demonstration test was carried out for the following purposes: (1) to confirm the construction adaptability of this method at an actual site, (2) to confirm the route and impact of a falling stone and the behavior of a retaining wall for falling stones, by dropping actual stones on a slope face.
This paper presents the performance test on impact buffering materials conducted as a preliminary test, the adaptability of actual construction work, and the results of falling stone demonstration experiment.
