AN IDENTIFICATION OF DEM PARAMETERS FOR ROCKFALL ANALYSIS

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  • YOKINO Kazuyoshi
    社団法人 土木学会 (株) 基礎建設コンサルタント 技術部
  • YAMAGAMI Takuo
    社団法人 土木学会 徳島大学 工学部建設工学科

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  • 落石運動解析に要する個別要素法パラメータの同定法
  • ラクセキ ウンドウ カイセキ ニ ヨウスル コベツ ヨウソホウ パラメータ ノ ドウテイホウ

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Abstract

A methodology is presented in which four DEM parameters are identified from back analysis of rockfall trajectories observed in field rockfall tests or traced by site investigation of natural rockfall occurrences on a slope. The proposed method, though in an indirect manner, can evaluate the parameters taking into account the effects of slope deformation and/or collision between falling rock and vegetation on the slope. A number of laboratory rockfall tests results and an in-situ test result were used to verify the proposed approach. As a result, it is concluded that four parameters can be reasonably determined from back analysis of the trajectories of falling rocks.

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