Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on Decreasing Behavior of Strength & Elastic Parameters due to Water Infiltration in Rock Cores (III)

침투류에 의한 암석시료의 함수 저감거동 연구 (III)

  • 조홍제 (울산대학교 건설환경공학부) ;
  • 문종규 (동명기술공단(주), 토질 및 기초기술) ;
  • 정일수 (울산대학교 대학원, (주)부광엔지니어링)
  • Received : 2012.11.01
  • Accepted : 2013.01.17
  • Published : 2013.01.31
Download PDF
⟨ Previous Next ⟩

Abstract

This paper deals with behaviors of Poisson's ratio with water content through uniaxial compressive strength against 307 individual rock cores, which are classified into sedimentary, igneous and metamorphic rock. Poissons' ratio demonstrates independent behaviors and does not correlate with mechanical and physical parameter of rocks. The water content behavior of Poissson's ratio represents decrease, increase and random style. Rock samples with decreasing behavior demonstrate absolute preponderance above the 70% level. As Poisson' ratio shows independent behaviors, it should be considered based on experimental results of in-situ rock in the process of design, construction, and supervision.

본고는 암석 코아에 함수비가 증가함에 따라 포아송비 거동형태를 구명하기 위하여 일축압축강도시험을 시행하였다. 현장에서 출토빈도가 높은 퇴적암, 화성암 및 변성암 시료 307개를 대상으로 포아송비의 함수거동을 관찰하였다. 포아송비는 암석의 역학적, 물리적 parameter와는 상관성이 전혀 표출되지 않는 독립적인 거동을 하고 있다. 포아송비의 함수거동은 감소, 증가 및 자유거동을 표출하고 있다. 감소거동을 나타내는 시료는 전체의 약 70%이상이며 이것은 포아송비의 함수거동 중 절대적으로 우세한 것이다. 포아송비는 독립거동을 하기 때문에 간접적인 방법으로는 추정이 불가능하다. 따라서 설계, 시공 및 감리과정에서 현장암에 대한 실험 결과를 적용하여야 할 것이다.

Keywords

References

  1. Amadei, B., Savage, W. Z., and Swolfs, H. S. (1987), "Gravitational stresses in anisotropic rock masses". Int. J. Rock Mech. Min.Sci. Geomech Abstr., Vol.24, No.1, pp.5-14. https://doi.org/10.1016/0148-9062(87)91227-7
  2. ASTM. 1986a "Standard test method for unconfined compressive strength of intact rock core specimens", ASTM Stand.
  3. ASTM. 1993. "Standard test method for elastic moduli of intact rock core specimens in uniaxial compression", ASTM Stand.(D 3148).
  4. ASTM. 1998, "Standard Test Method for Laboratory Determination of Water(Moisture) Content of Soil and Rock by Mass", ASTM Stand.
  5. ASTM. 2001. "Standard practices for preparing rock core specimens and determining dimensional and shape tolerances". ASTM Stand.
  6. ASTM. 2009. "Standard test method for compressive strength and elastic moduli of intact rock core specimens under varying states of stress and temperatures", ASTM Stand.(D 7012-07e1).
  7. Aughenbaugh, N. B. (1974), "Effect of Moisture on shale", 23rd. Annual Soil Mech. & Found. Eng. Conf.(ASCE Geotechnical Division), pp.1-15.
  8. Bhasin R. and Hoeg K. (1998), "Numerical modelling of block size effects and influence of joint properties in multiply jointed rock", Tunnelling and Undergroundspace Tech, Vol.13, No.2, pp.181-188. https://doi.org/10.1016/S0886-7798(98)00046-7
  9. Bieniawski, Z. T. (1967), "Mechanism of Brittle Fracture of Rock, Part2-Experimental Studies", Int. J. of Rock Mech. and Min. Sci., Vol.4, pp.407-423. https://doi.org/10.1016/0148-9062(67)90031-9
  10. Cho, H. J., Moon, J. K., and Jeong, I. S. (2012a), "A Study on Decreasing Behavior of Strength and Elastic Parameters due to Water Infiltration in Rock Cores(I)". The Journal of Korean Geotechnical Society, Vol.28, No.9, pp.69-83. https://doi.org/10.7843/kgs.2012.28.9.69
  11. Cho, H. J., Moon, J. K., and Jeong, I. S. (2012b), "A Study on Decreasing Behavior of Strength and Elastic Parameters due to Water Infiltration in Rock Cores(II)". The Journal of Korean Geotechnical Society, Vol.28, No.11, pp.5-17. https://doi.org/10.7843/kgs.2012.28.11.87
  12. Erguler, Z. A. and Ulusay, R. (2009), "Water induced variations in mechanical properties of clay-bearing rocks", Int. J. Rock Mech. & Min. Sci., Vol.46, pp.355-370. https://doi.org/10.1016/j.ijrmms.2008.07.002
  13. Gercek, H. (2007), "Poisson's ratio values for rock", Int. J. Rock Mech. & Min. Sci., Vol.44, pp.1-13. https://doi.org/10.1016/j.ijrmms.2006.04.011
  14. Gill, D. E., Corthesy, R., and Leite, M. H. (2005), Determining the minimal number of specimens for laboratory testing of rock properties, Eng. Geol., Vol.78, pp.29-51 https://doi.org/10.1016/j.enggeo.2004.10.005
  15. Hawkes, I. and Mellor, M. (1969), "Uniaxial testing in rock mechanics laboratories", Eng. Geol., Vol.4, pp.177-285.
  16. Hawkins, A. B. and McConnell, B. J. (1992), "Sensitivity of sandstone strength and deformability to changes in moisture content". Q. J. Eng. Geol., Vol.25, pp.115-130. https://doi.org/10.1144/GSL.QJEG.1992.025.02.05
  17. Heap, M. J. and Faulkner, D. R. (2008), "Quantifying the evolution of elastic properties as crystalline rock approaches failure", Int. J. Rock Mech. & Min. Sci., Vol.45, pp.564-573. https://doi.org/10.1016/j.ijrmms.2007.07.018
  18. ISRM (1979), "Suggested methods for determining the uniaxial compressive strength and deformability of rock materials", Int. J. Rock Mech. Min. Sci. Geomech. Abstr., Vol.16(2), pp.135-140.
  19. ISRM (1981), Part 1, "Suggested method for determination of the uniaxial compressive strength of rock materials", Int. J. Rock Mech. Min. Sci. Geomech. Abstr., Vol.16(2), pp.141-156.
  20. ISRM (1994), "Suggested methods for determining water content, porosity, density, absorption and properties and swelling and slakedurability index properties", Int. J. Rock Mech. Min. Sci. Geomech. Abstr., Vol.31, No.5, pp.547-550. https://doi.org/10.1016/0148-9062(94)90156-2
  21. ISRM (1999), "Suggested method for the complete stress-strain curve for intact rock in uniaxial compression", Int. J. of Rock Mech. and Min. Sci., Vol.36, No.3, pp.279-289. https://doi.org/10.1016/S0148-9062(99)00006-6
  22. Kim, J. Y. (1985), "Statistics", Kyung-Mun Sa ed..
  23. Kim, U. C., Kim, J. J., Park, B. W., Park, S. H., Song, M. S., Lee, S. Y., Lee, Y. J., Juon, J. W., and Cho, S. S.(2005), "Modern Statistics", Col. of Nature, SNU, Young-Ji sa ed.
  24. Min, K. B. and Jing, L. (2004), "Stress dependent mechanical properties and bounds of Poisson's ratio bfor fractured rock masses investigated by a DFN-DEM technique", Sinorock 2004 Symposium, Int. J. Rock Mech. & Min. Sci., Vol.41, No.3, CD-Rom.
  25. Wikipedia (2011), http://en.wikipedia.org/wiki/Poisson%27s-ratio.
  26. Yamaguchi, U. (1970), "The number of test-pieces required to determine the strength of rock", Int. J. Rock Mech. Min. Sci. Geomech. Abstr., Vol.7, No.2, pp.209-227. https://doi.org/10.1016/0148-9062(70)90013-6