Rock fall behavior s on inclined granular mats with different impact conditions

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  • 堆積層を有する斜面における衝突条件が異なる落石の運動挙動
  • タイセキソウ オ ユウスル シャメン ニ オケル ショウトツ ジョウケン ガ コトナル ラクセキ ノ ウンドウ キョドウ

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Abstract

Cushioning materials, such as sand cushion and granular mats placed on rock sheds, can effectively disperse and reduce rock fall energy before rocks collide with protection works. In order to properly evaluate the damping effect of the falling rock energy of topsoil and talus, this study examines the falling rocks behaviors on inclined granular mats with different impact conditions. The results obtained are summarized as follows: (1) The incident angle against the slopes and the rotation of the falling rocks affect strongly to the falling rocks behavior; (2) If rock fall collisions with incident angle of 20 degrees or more to horizontal granular mat before collisions to protection works, the kinetic energy of rock fall is reduced half.

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