Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
권호 표지

Stress Distribution Under Line Load in Transversely Isotropic Rock Mass

평면이방성 암반에서 선하중에 의한 응력분포 특성

  • 이연규 (군산대학교 해양과학대학 해양시스템공학)
  • Published : 2005.08.01
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Abstract

Many mechanical defects originated from various geological causes make rock mass exhibit anisotropic characteristics. Understanding how the stress distribution occurs in anisotropic rock mass is, therefore, very important for the design of footings on rock and rock structures. In this study, the patterns of elastic stress distribution, developed by acting line load on the surface, in transversely isotropic was investigated. The influence of joint stiffness, joint spacing, and dip angle on the stress distribution was examined. By assuming the Mohr-Coulomb criterion as joint slip condition, the development of joint slip zone was also discussed.

암반은 여러 가지 지질학적 요인에 기인한 역학적 결함을 많이 포함하고 있기 때문에 이방성 거동을 보이는 경우가 대부분이다. 그러므로 안정한 암반구조물이나 암반기초의 설계를 위해서는 이방성 암반에서 응력분포의 특성을 이해하는 것이 매우 중요하다. 이 연구에서는 반무한 평면이방성 지반의 표면에 선하중이 작용할 때 지반에 야기되는 탄성응력 분포의 특성을 고찰하였다. 절리의 강성과 절리의 간격, 경사각이 응력분포 형태에 미치는 영향이 검토되었다. 절리면의 미끄러짐 조건으로 Mohr-Coulomb 식을 가정할 경우, 절리면을 통한 미끄러짐이 발생할 수 있는 영역에 대한 고찰도 수행되었다.

Keywords

References

  1. Amadei, B., 1988, Strength of a regularly jointed rockmass under biaxial and axisymmetric loading, Int. J. Rock Mech. Mining Sci., 25.1, 3-14 https://doi.org/10.1016/0148-9062(88)92712-X
  2. Amadei, B., 1993, Effect of joints on rock mass strength and deformability, Compressive Rock Engineering, Principles, Practice & Projects, Vol. 1, 331-365
  3. Fossum, A.F., 1985, Effective elastic properties for a randomly jointed rock mass, Int. J. Rock Mech. Min. Sci. & Geomech. Abstr. 22, 467-470 https://doi.org/10.1016/0148-9062(85)90011-7
  4. Goodman, R.E., 1989, Introduction to rock mechanics (2nd Ed.), John Wiley & Sons
  5. Itasca, 1999, FLAC Theory and background, USA
  6. Jaeger, J.C. and Cook, N.G.W., 1968, Fundamentals of rock mechanics, Chapaman & Hall, London
  7. Kumar, P., 1997, Slip zones around circular openings in a jointed Hoek-Brown Medium, Int. J. Rock Mech. Min. Sci., 34.6, 875-883 https://doi.org/10.1016/S0148-9062(97)00271-4
  8. Lekhnitskii, S.G., 1963, Theory of elasticity of an anisotropic elastic body, Holden-Day, Inc
  9. Maplesoft, 2003, Maple 9 - Advanced programing guide, Waterloo Maple Inc
  10. Obert, L. and Duvall, W.I., 1967, Rock mechanics and the design of structures in rock, John Wiley & Sons, Inc
  11. Wyllie, D.C., 1992, Foundations on rock, Chapman & Hall