터널과지하공간 (Tunnel and Underground Space)

  • 제23권3호
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  • Pages.203-211
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  • 2013
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  • 1225-1275(pISSN)
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  • 2287-1748(eISSN)
한국암반공학회 (Korean Society for Rock Mechanics and Rock Engineering)
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절리면 전단거동에서의 법선응력 영향 고찰

A Study on the Effect of Normal Stress on the Joint Shear Behavior

  • 조태진 (부경대학교 에너지자원공학과) ;
  • 석재욱 (한국시설안전공단 시설안전연구소)
  • 투고 : 2013.04.26
  • 심사 : 2013.05.20
  • 발행 : 2013.06.30
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초록

법선응력 수준과 초기 절리면 거칠기를 고려하여 절리면의 전단거동 특성을 고찰하였다. 절리면 전단강도는 순차적으로 법선응력을 증가시키는 다단계 전단시험을 수행하여 측정하였다. 일정한 법선응력 구간에서의 다단계 전단시험을 반복적으로 수행하여 전단파괴 기준선을 산출하였으며, 기준선의 순차적인 변화양상을 고찰하여 전단강도정수인 점착력과 마찰각의 2가지 변화 형태를 도출하였다: type 1 - 점착력 감소 및 마찰각 감소, type 2 - 점착력 감소 및 마찰각 증가. 편마암, 화강암 및 셰일의 3가지 암종별 전단강도정수 변화양상을 고찰하였으며, 순차적 전단거동 과정에서 절리면의 초기 거칠기가 전단강도 변화에 미치는 영향도 분석하였다.

Shear behavior of joint plane has been investigated considering the magnitude of normal stresses and initial surface roughness. Shear strength of joint plane has been measured by performing the multi-stage shear test in which applied normal stress level has been increased stepwise. Multi-stage shear test within the specified normal stress range has been repeated and two types of strength parameter variation have been observed: type 1 - both cohesion and friction angle decrease, type 2 - cohesion decrease and friction angle increase. Trends of strength parameter variation for the three rock types, gneiss, granite and shale, have been investigated and the influence of initial roughness of joint plane on the sequential shear strength change for the repeated multi-stage shear tests also has been analyzed.

키워드

참고문헌

  1. Barton N., 1973, Review of a new shear-strength criterion for rock joints. Engineering. Geology, Vol. 7, 287-332. https://doi.org/10.1016/0013-7952(73)90013-6
  2. Byerlee. J.D, 1978, Friction of rocks, Rock friction and earthquake prediction, Birkhauser Basel, pp. 615-626.
  3. Grasselli, G. and Egger, P, 2003, Constitutive law for the shear strength of rock joints based on three-dimensional surface parameters, International Journal of Rock Mechanics and Minign Sciences, Vol. 40, No. 1, pp. 25-40. https://doi.org/10.1016/S1365-1609(02)00101-6
  4. Hoek and Bray J.W., 1981, Rock slope engineering, revised third edition, E and FN Spon, London.
  5. Hsu, S.M., Klaus, E. E., and Cheng, H. S., 1988, A mechano-chemical descriptive model for wear under mixed lubrication conditions, Wear, 128, 307-323. https://doi.org/10.1016/0043-1648(88)90066-X
  6. Jaeger J. C., 1971, Friction of rocks and stability of rock slopes, Geotechnique 21, No. 2, pp. 97-134. https://doi.org/10.1680/geot.1971.21.2.97
  7. Jaeger, J. C. and Cook, M. G. W., 1969, Fundamentals of Rock Mechanics, Methuen, London, Chapter III.
  8. Kim, D.Y., 2001, Roughness effects on the shear behavior of rock joints, A doctoral dissertation, HanYang univ.
  9. Ladany B. and Archambault G., 1969, Simulation of shear behavior of a jointed rock mass. Proc. 11th Symposium on Rock Mechanics, New York, pp. 105-125.
  10. Lane, K. S., and Heck, W. J., 1964, Triaxial testing for strength of rook joints, The 6th U.S Symposium on Rock Mechanics, Rolla, pp. 98-108.
  11. Patton F. D., 1966, Multiple modes of shear failure in rock. 1st Congress. ISRM, Lisbon, Vol. 1, pp. 509-513.
  12. Park. J.W, Lee. Y.K, Song. J.J and Choi. B.H, 2012, A New Coefficient for Three Dimensional Quantification of Rock Joint Roughness, Journal of Korean society for Rock Mechanics, Vol. 22, No. 2, pp. 106-119. https://doi.org/10.7474/TUS.2012.22.2.106
  13. Yoon. J.S, Kim. D.Y, Lee. H.S and Yoon. H.I, 1998, A study on the shear strength measurement of the seoul granite by the 'Multi-stage' direct shear test, Journal of Korean society for geosystem engineering, Vol. 35, No. 5, pp. 435-443.

피인용 문헌

  1. A Study of the Effect of Asperity Change on the Shear Strength of Joint Plane vol.23, pp.5, 2013, https://doi.org/10.7474/TUS.2013.23.5.401