Multistage Tunnel Excavation and Support

Software:
FLAC 8.0
Walk-Through: 
Runs in Demo: 
No
Level: 
INT
Details and Description: 

FLAC simulates the four excavation stages and three construction steps within each stage for a multistage tunnel excavation and construction.  The convergence-confinement method is used to simulate the effect of the tunnel advance.  A ground reaction curve is calculated to relate the effect of the advancing tunnel face to reduction in internal pressure within the excavated region.  Both rockbolt support and a shotcrete liner are installed at different stages of the tunnel advance.

Keywords: 
  • Multistage excavation
  • shallow tunnel
  • rockbolts
  • Shortcrete
  • Ground reaction curve
  • Mohr-Coulomb model
Materials: 
  • Concrete
  • Rock
  • Steel
Analyses: 
  • Static