EVALUATION OF DEFORMABILITY AND STRENGTH OF ROCK MASS USING PROPERTIES OF INTACT ROCKS AND DIGITAL IMAGE OF CRACK DISTRIBUTION

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  • 岩石の力学特性と不連続面画像情報による岩盤の変形強度特性評価
  • ガンセキ ノ リキガク トクセイ ト フレンゾクメン ガゾウ ジョウホウ ニ ヨル ガンバン ノ ヘンケイ キョウド トクセイ ヒョウカ

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Abstract

Mechanical properties of rock mass are strongly governed by the microscopic structure that consists of distributed cracks and various rock materials. In order to evaluate the deformability and the strength of such a rock mass, the numerical scheme of multi-scale which is based on both the homogenization method and the limit load analysis is proposed. The data needed are only the mechanical properties of intact rocks and the digital image of crack distribution, which are easily obtained from laboratory tests and survey in site. The deformability and strength of representative element of rock mass are reasonably evaluated from the homogenization analyses. And then the limit load of a rock mass structure is also successfully evaluated by the limit load analysis.

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