Journal of the Korean Geotechnical Society (한국지반공학회논문집)

Korean Geotechnical Society (한국지반공학회)
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Investigation on Tunneling and Groundwater Interaction Using a 3D Stress-pore Pressure Coupled Analysis

응력-간극수압 3차원 연계해석을 통한 터널굴착과 지하수의 상호작용 고찰

  • 유충식 (성균관대학교 토목환경공학과)
  • Published : 2004.04.01
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Abstract

This paper presents the effect of groundwater on tunnel excavation. Fundamental issues in tunneling under high groundwater table are discussed and the effect of groundwater on tunnel excavation was examined using a 3D stress-pore pressure coupled finite-element analysis. Based on the results the interaction mechanism between the tunnelling and groundwater is identified for cases having different lining permeabilities. Examined items include pore pressures around lining and lining stresses. Face deformation behavior as well as ground surface movement patterns was also examined. Besides, the effect of grouting pattern was investigated. The results indicated that the effect of groundwater on tunnel excavation increases lining stresses as well as ground movements, and that the tunnel excavation and groundwater interaction can only be captured through a fully coupled analysis. Implementations of the findings from this study are discussed in great detail.

본 논문에서는 지하수가 터널굴착에 미치는 영향을 고찰하였다. 먼저 지하수위 아래에서의 터널시공시 발생하는 기본 메카니즘을 알아보았으며 가상의 시공조건에 대해 유한요소해석 기반의 3차원 응력-간극수압 연계해석을 수행하고 그 결과를 토대로 라이닝 작용하중 및 유발응력, 막장안정성, 지표침하 등 지하수와 터널굴착의 상호관계를 고찰하였다. 한편, 다양한 라이닝 투수성 및 그라우팅 패턴에 대한 해석을 수행하고 전반적인 터널 및 주변지반의 거동을 분석하였다. 해석 결과 터널굴착과 지하수의 상호작용은 라이닝 응력과 지반거동을 증가시키며 이러한 지하수가 터널굴착에 미치는 영향은 연계해석을 통해서 만이 이해가 가능하며 전응력해석을 수행할 경우 지하수의 영향을 과소평가할 수 있는 것으로 나타났다. 한편, 본 해석에서 얻어지는 결과를 실무적 측면에서 다각도로 고찰하였다.

Keywords

References

  1. J. Appl. Phys. v.12 General theory of three dimiensional consolidation Biot,M.A. https://doi.org/10.1063/1.1712886
  2. J. Appl. Phys. v.26 no.2 Theory of elastricity and consolidation for a porous anisotropic solid Biot,M.A. https://doi.org/10.1063/1.1721956
  3. Quarterly of Applied Mathematics v.10 no.2 Soil mechanics and Plastic Analysis in Limit Design Drucker,J.M.;Prager,W. https://doi.org/10.1090/qam/48291
  4. Tunnelling and Underground Sapce Technology v.16 The study of seepage froces acting on the tunnel limiting and runnel face in shallow tunnels Lee,I.M.;Nam,S.W. https://doi.org/10.1016/S0886-7798(01)00028-1
  5. Norwegian Urban Tunnelling Norwegian Soil and Rock Engineering Association, Publication No 10
  6. Report on Design issues of the concrete limiting of the waterway tunnel KOWACO
  7. Geotechnique v.52 no.6 A numerical study of the effect of groundwater movement on long-term tunnel behavior Shin,J.H.;Addenbrooke,T.J.;Potts,D.M. https://doi.org/10.1680/geot.2002.52.6.391
  8. Geotechnique v.52 no.3 Three-dimensional modeling of NATM tunnelling in decomposed granite soil Shin,J.H.;Potts,D.M.;Zdravkovic,L. https://doi.org/10.1680/geot.2002.52.3.187
  9. Int. J. Numer. Analye Meth. Geomech. v.8 Dynamic behavior of saturated porous media: The generalized Biot formulation and its numerical solution Zienkiewiez,O.C.;Shiomi,T. https://doi.org/10.1002/nag.1610080106