A study on the Fracture Mechanism and the Test for Strength Properties of the Granite-Gneiss

화강편마암의 강도특성 실험 및 파괴메카니즘에 관한 연구

  • 최안식 ((주)신아지오컨설턴트 사원) ;
  • 조만섭 (한국건설기술연구원 토목연구부 연구원) ;
  • 김영석 (전북대학교 공과대학 자원공학과)
  • Published : 2000.06.01

Abstract

When tunnels or underground structures are constructed in anisotropic rock mass, designers and constructors have to consider the anisotropic characteristics in rock mass because their physical and mechanical properties are depended on the anisotropic angles(${\beta}$). In this study, therefore, we have first investigated the mechanical behavior of the gneiss specimen from lab. tests, and then have analysed the behavior of specimens for to the transversely isotropic model in elastic medium using the FLAC program. The results of this study were summarized as follows; 1) In the result of the variation tests, in general, the properties of strength were depended on the angle of inclination in spite of the hard rock. And except for the shear strength test, the lowest and peak stress were appeared at 60$^{\circ}$ and 90$^{\circ}$respectively. 2) The results of specimen modeling analysis using FDM well indicated the mechanical behaviors of the specimen of transversely isotropic model.

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