DILATION PROPERTIES OF REGULAR DISCONTINUITIES DURING SHEAR

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  • 規則的な不連続面のせん断時のダイレタンシー特性
  • キソクテキ ナ フレンゾクメン ノ センダンジ ノ ダイレタンシー トクセイ

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Abstract

This paper deals with the influence of joint roughness on the dilation behaviour and the shear strength properties. Direct shear tests on seven types of plaster-sand specimens which have the rough discontinuities of regular triangle shapes have been conducted, and the comparison those results with Ladanyi and Archambault's criteria and Patton's criteria was carried out.<br>The results obtained are summarized as follows:<br>(1) The dilation behaviour is remarkably affected by the angle of the teeth.<br>(2) The shear strength of regular triangular joints gradually approaches the shear strength of flat joints rather than intact specimens.

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