Tunnel and Underground Space (터널과지하공간)

Korean Society for Rock Mechanics and Rock Engineering (한국암반공학회)
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Estimation of Preceding Displacement at Tunnel Excavation by NATM

NATM 시공에 의한 터널 굴착시 선행변위 추정에 관한 연구

  • 신동오 (강원대학교 자원공학과) ;
  • 임한욱 (강원대학교 자원공학과) ;
  • 김치환 (LG ENC 이사(기술연구소장))
  • Published : 1998.06.01
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Abstract

Field instrumentation and numerical analysis by the finite difference method were applied to estimate the relaxed zone in a subway tunnel of shallow depth in soft rock, excavated by NATM. The convergence and ground displacement can be used to estimate the deformation behavior and the relaxed zone. Parameters for the several models previously suggested were measured using regression analysis techniques adopting a function of time and the face advance. The estimated relaxed zone by the MPBX and FDM analysis were 1.5~3.0 m and 1.5~2.0 m, respectively. It was concluded that the visco-elastic model and the time-dependent elasto-plastic model correlate very well ($r^2$>0.9) with results of the numerical analyses.

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References

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