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Shear Behavior of Rough Granite Joints Under CNS Conditions  

Park, Byung-Ki (산업자원부 에너지자원개발본부 광물자원팀)
Lee, Chang-Soo (서울대학교 지구환경시스템공학부)
Jeon, Seok-Won (서울대학교 지구환경시스템공학부)
Publication Information
Tunnel and Underground Space / v.17, no.3, 2007 , pp. 203-215 More about this Journal
Abstract
Stability and mechanical deformation behavior of rock masses are highly dependent on the mechanical characteristics of contained discontinuities. Therefore, mechanical characteristics of the discontinuities should be considered in the design of tunnel and underground structures. In this study, direct shear tests for rough granite joints were carried out under constant normal stiffness conditions. Effects of initial normal stress, shear velocity, and surface roughness on the characteristics of shear strength and deformation behaviors were examined. Results of shear testing under constant normal stiffness conditions reveal that shear behaviors could be classified into two categories, based on the amount of decrease in shear stress at the Int peak shear stress. With initial normal stiffness increasing, it turned out that shear displacement at peak stress and the first peak shear stress increased, however friction angle and friction coefficient showed decrease. In case of shear stiffness and average friction coefficient, it turned out that they are not dependent on the initial normal stress. Minor effects of shear velocity on rough joints were observed in several shear quantities. However, the effects of shear velocity were insignificant regardless of the normal stress increase. Change of shear strength and deformation characteristics on joint roughness were examined, however, it turned out that the variations were attributed to deviation of shear test specimens.
Keywords
Constant normal stiffness(CNS); Shear behavior; Rough granite joints; Shear velocity; Roughness;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 Barton, N., 1973, Review of a new shear strength criterion for rock joints, Engineering Geology, 7, 287-332   DOI   ScienceOn
2 Patton, F.D., 1966, Multiple modes of shear failure in rock, Proceedings of the 1st Congress of the ISRM, Lisbon, 509-513
3 Bandis, S.C., Lumsden, A.C., Barton, N., 1983, Fundamentals of rock joint deformation, International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 20(6), 12 1-140
4 박병기, 2005, 암석 절리면의 동적 마찰거동 특성, 공학박사학위논문, 서울대학교
5 Ohnishi, Y., Dharmaratne, P.G.R., 1990, Shear behaviour of physical models of rock joints under constant normal stiffness conditions, Proceedings of the International Symposium on Rock Joints, Loen, Norway, Balkema, Rotterdam, 267-273
6 Lam, T.S.K, Johnston, l.W., 1985, A scanning device to quantify joint surface roughness, Geotechnical Testing Journal 8.3, 117-124   DOI   ScienceOn
7 박병기, 전석원, 2006, 진동대 시험에 의한 편평한 암석 절리면의 동적 마찰거동 특성, 터널과 지하공간(한국암반공학회지), 16.1, 58-72   과학기술학회마을
8 Goodman, R.E., 1976, Methods of Geological Engineering in Discontinuous Rocks, West Publishing Company, New York
9 Mouchaorab, S.K., Benmokrane, B., 1994, A new combined servo-controlled loading frame/directhear apparatus for the study of concrete or rock joint behavior under different boundary and loading conditions, Geotechnical Testing Journal, 17(2), 233 -242   DOI   ScienceOn
10 Jiang, Y., Xiao, J., Tanabashi, Y. and Mizokami, T., 2004, Development of an automated servoontrolled direct shear apparatus applying a constant normal stiffness condition, Int. J. Rock Mech. Min. Sci., Vol. 41, No.2., pp. 275 -286   DOI   ScienceOn
11 박병기, 이창수, 전석원, 2007, 편평한 암석절리면의 속도 의존적 전단거동 특성, 터널기술(터널공학회지) 거재예정
12 임홍래, 2004, 암반 절리의 일정 수직 강성 조건하의 전단 거동에 관한 실험적 연구, 공학석사학위논문, 서울대학교
13 Skinas, C.A., Bandis, S.C., Demiris, C.A., 1990, Experimental investigations and modelling of rock joint behavior under constant stiffuess, Proceedings of the International Symposium on Rock Joints, Loen, Norway, Balkema, Rotterdam, 301-308
14 권종찬, 2005, 전단시험방법에 따른 암석 절리면의 전단거동특성에 관한 비교연구, 공학석사학위논문, 서울대학교
15 Tse, R., Cruden, D.M., 1979, Estimating joint roughness coefficients, Int. J. Rock Mech. Min. Sci. & Geomech. Abstr. 16, 303-307   DOI   ScienceOn
16 Seidel, J.P., Haberfield, C.M., 2002, Laboratory testing of concrete-rock joints in constant normal stiffness direct shear, Geotechnical Testing Journal, 25(4), 1-14
17 Van Sint Jan, M.L., 1990, Shear tests of model rock joints under stiff normal loading, Proceedings of the International symposium on Rock Joints, Loen, Norway, Balkema, Rotterdam, 323-327
18 Indraratna, B., Haque A. and Aziz N., 1998, Laboratory modelling of shear behaviour of soft joints under constant normal stiffness conditions, Geotechnical and Geological Engineering, 16, 1 7-44   DOI   ScienceOn
19 배기윤, 이정인, 2002, 레이저 변위계를 이용한 암석절리면의 3차원 거칠기 측정기 개발, 터널과 지하공간(한국암반공학회지) 12.4, 268-276
20 Johnston, I.W., Lam, T.S.K., Williams, A.F., 1987, Constant Normal stiffness direct shear testing for socketed pile design in weak rock, Geotechnique, 37, 83-89   DOI   ScienceOn