Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)

Korean Geotechnical Society (한국지반공학회)
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Experiments Study on Critical Strain Properties of Sedimentary Rocks based on Mohr-Coulomb Strength Criterion

Mohr-Coulomb의 파괴기준을 기본으로한 퇴적암의 한계변형률 특성에 관한 연구

  • Kim, Young-Su (Dept. of Civil Engineering, Kyungpook National University) ;
  • Lee, Jae-Ho (Dept. of Civil Engineering, Kyungpook National University) ;
  • Jin, Guang-Ril (Dept. of Civil Engineering, Kyungpook National University) ;
  • Shin, Shi-Un (Civil Construction Division, KOLON E&C) ;
  • Kwon, Tea-Soon (Dept. of Civil Engineering, Kyungpook National University) ;
  • Han, Hee-Su (Dept. of Civil Engineering, Kyungpook National University)
  • 김영수 (경북대학교 토목공학과) ;
  • 이재호 (경북대학교 토목공학과) ;
  • 김광일 (경북대학교 토목공학과) ;
  • 신시언 (코오롱 건설주식회사 토목사업본부) ;
  • 권태순 (경북대학교 토목공학과) ;
  • 한희수 (경북대학교 토목공학과)
  • Published : 2008.03.28
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Abstract

The hazard warning levels are necessary for the rational design and safety construction of underground space, as mountain and urban tunnel. Sakurai provided the hazard warning levels for assessing the stability of tunnels using the critical strain of rock mass, which is defined as a ratio between uni-axial compressive strength and the Young's modulus. The concept of critical strain guidelines is introduced in this study for the assessment of tunnel safety during excavation. Moreover, in this paper, the critical strain properties of sedimentary rock in Korea has investigated and analysed in detail by Lab. test, as the uniaxial and triaxial compression tests. Finally, critical strain properties of sedimentary rock on uniaxial and triaxial stress condition is discussed the relationship of failure strain values, uniaxial and triaxial compression strengths, confining pressure and Young's modulus.

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