二層緩衝構造と杭基礎を併用した壁式落石防護擁壁の開発に関する数値解析的検討
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概要
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A two-layered absorbing system, composed of RC slab for outer layer and EPS (Expanded Poly-Styrol) block for back layer, has been developed to effectively absorb the impact force occurred due to falling rocks colliding against gravity type rockfall retaining-wall. Design procedure for gravity type retaining-wall with two-layered absorbing system has also been established. However, there are some sites where this type retaining-wall cannot be constructed because highway has constructed along the cliff without much space. In this study, in order to set the rockfall retaining-wall, wall type one is proposed which is composed of two-layered absorbing system and concrete wall with piled foundations. An applicability of the proposed retaining-wall was numerically investigated by means of three-dimensional elasto-plastic finite element method. Finally, it is seen that two-layered absorbing system can effectively absorb the impact force and the proposed retaining-wall is feasible for practical applications.
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