Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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A Study on Shear Behaviors for the Rock Joint in the Constant Normal Stiffness Condition

일정수직강성(CNS) 조건에서 절리면 전단거동에 관한 연구

  • 김용준 (대림산업(주) 토목사업본부 토목사업부) ;
  • 이영휘 (영남대학교 공과대학 토목도시공학부) ;
  • 김선기 (대림산업(주) 토목사업본부 토목사업부) ;
  • 김주화 (대림산업(주) 토목사업본부)
  • Published : 2005.10.01
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Abstract

Apart from the geometric features of the rock joints, the shear characteristics of rock mass subject to shear force are also significantly affected by the boundary conditions in the neighborhood of the rock mass. The boundary conditions of the rock mass can be classified into 4 categories according to the stress state of the rock joint, of which the constant normal load (CNL) is the most used for shear test and produces the lowest shear strength and different behavior. In this study, the shear behavior under constant normal stiffness condition was able to replicated by the graphic method normalized by the test results under constant normal stress condition.

전단하중을 받는 암반의 전단특성은 절리면의 구조적인 특징뿐만 아니라 암반 주변의 경계조건에 의해서도 영향을 받는다. 암반블록의 경계조건은 절리면이 받고 있는 응력상태를 기준으로 4가지로 구분할 수 있다. 일반적으로 주로 사용되는 CNL 조건의 전단시험에서 얻어지는 전단강도는 다른 경계조건에서 얻어지는 것보다 낮은 전단강도를 나타내며 그 거동도 다른 것으로 나타났다. 본 연구에서는 일정수직하중(CNL) 시험결과를 정규화한 그래픽 방법을 이용하여 일정수직강성(CNS) 조건의 전단거동을 모사할 수 있었다.

Keywords

References

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