다양한 구성방정식에 따른 터널 거동해석

The Analysis of Tunnel Behavior using Different Constitutive Models

  • 김영민 (전주대학교 공과대학 토목환경공학과) ;
  • 강성귀 (전주대학교 공과대학 토목환경공학과)
  • 투고 : 2010.03.15
  • 심사 : 2010.04.16
  • 발행 : 2010.04.30

초록

본 논문에서는 여러 가지의 구성방정식 모델을 이용하여 NATM 터널의 유한요소 해석의 적용에 대하여 설명하였다. 일련의 2차원 평면변형률 조건하 NATM 터널의 지반-구조물에 대한 해석을 분석하였다. 사용한 4가지 구성방정식 모델로는 선형탄성, Mohr-Coulomb 탄소성, 변형경화, 연화지반모델이다. 터널설계에서는 지표면의 침하, 지보재 축력에 대한 적절한 예측이 필요하다. 수치해석결과 진보된 구성방정식 모델이 지반변형과 지보재의 축력에 대해 보다 적절한 결과를 나타내었다.

The paper presents the application of FE simulations of NATM tunnel using different constitutive models. The results from a series of two dimensional plane strain finite element analyses of medium-liner interaction for NATM are presented. Four types of constitutive models are considered, namely, linear elastic, elasto-plastic Mohr-Coulomb, Hardening-Soil, Soft-Soil model. The design for tunnels requires a proper estimate of surface settlement and lining forces. It is shown that the advanced constitutive model gives better predictions for both ground movement and structural forces.

키워드

참고문헌

  1. 신종호, 2001, 화강토의 구성방정식 및 터널해석에의 적용, 한국지반공학회논문집, Vol.17, No1, pp. 131-139.
  2. Duncan, J.M. and Chang, C.Y., 1970, Nonlimear analysis of stress and strain in soil, ASCE.J.of the Soil Mech. and Found. Div. Vol.96, pp. 1629-1653.
  3. Mair, R.J., 1996, Settlement effects of bored tunnels, Session Report. Proceedings of the International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground, Balkema, Rotterdam, pp. 2353-2385.
  4. Matsui, T. and San, K.C., 1990, A hybrid slope stability analysis method with its application to reinforced slope cutting, Soils and Foundations, Vol.30, No.2, pp. 79-88. https://doi.org/10.3208/sandf1972.30.2_79
  5. Moller, S.C., 2006, Tunnel induced settlement and structural forces in linings, Ph.D thesis, Institure of Geotechnical Engineering, University of Stuttgrat.
  6. Moller, S.C., Vermeer, P.A., 2008, On numerical simulation of tunnel installasion, Tunnelling and Underground Space Technology, Vol.23, pp. 461-475. https://doi.org/10.1016/j.tust.2007.08.004
  7. Muir Wood, A.M., 1975, The circular tunnel in elastic ground, Geotechnique Vol.25, No.1, pp. 115-127. https://doi.org/10.1680/geot.1975.25.1.115
  8. Owen, D.R.J. and Hinton,E., 1990, Finite element in plasticity, Pinerge Press.
  9. Roscoe, K.H., Burland, J.B. 1968, On the generalised stress-strain behaviour of wet clay. Engineering Plasticity, Cambridge University Press, pp. 535-609.
  10. Schanz, Vermeer, P.A. and Bonnier,P.G., 1999, The hardening soil model: Formulation and verification, Beyond 2000 in computational geotechnics, Balkema, Rotterdam, pp. 1-16.
  11. Vermeer, P.A. and Brinkgreve, R.B.J., 2002, PLAXIS: Finite element code for soil and rock mechanics(Ver 8.2), Balkema, Rotterdam.