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Collapse%20of%20tunnels:%20soil-structure%20interaction%20failures

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Collapse of tunnels: soil-structure interaction failures. Professor Robert Mair. Cambridge University Engineering ... Tunnel collapses usually catastrophic ... – PowerPoint PPT presentation

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Title: Collapse%20of%20tunnels:%20soil-structure%20interaction%20failures


1
Collapse of tunnels soil-structure interaction
failures
  • Professor Robert Mair
  • Cambridge University Engineering Department

2
Tunnelling with shield and rings.
3
New Austrian tunnelling method. Sprayed concrete
lining onto unsupported walls.
4
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5
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6
Conclusions
  • Tunnel collapses usually catastrophic
  • Soil-structure interaction important in tunnel
    lining design time-dependent soil pressures
    depend on stiffness of lining
  • Shape is critical horseshoe tunnel lining
    vulnerable to structural failure Toulon
  • Sprayed concrete vulnerable to construction
    defects in lining eventual instability
    Heathrow
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