| In Japan、 many rockfall protection walls have been constructed along the national highways in mountainous areas. Up till now、 usually these were gravity-type walls. However、 if here is not much space between the wall and the edge of the cliff、 it may not be easy to construct a normal type of wall. To rationally install the wall in these areas、 a retaining wall connected to a steel pile foundation attached to a two-layer absorbing system was recently developed. Here、 in order to establish a rational design for this type of retaining wall、 an impact response analysis was performed by means of three-dimensional elasto-plastic FE analysis. The two-layer absorbing system used here is composed of a 15 cm thick reinforced concrete slab together with a 50 cm thick expanded polystyrene (EPS) block. The retaining wall is connected to the steel piles by inserting H-section steel members embedded in the wall. The applicability of the proposed FE analysis method was verified by comparing with the prototype impact test results. |
