Brisbane Airport Link
Australia

The AU$4.8B Brisbane Airport Link project included construction of 12.6km of tunnels with large span openings at the multilane on and off ramps.

Geo-Design were commissioned by the JV to review designs of the large span underground excavations in bedded rock.

Sector: Civil infrastructure – transport tunnels and caverns.

• Ground support assessment
  Independent evaluation of tunnel support and stability, of wide spans with very shallow cover in a weak volcanic sedimentary sequence.
• Risk reduction
  Proposals for design modifications to reduce construction risk.
• Geological modelling
  Development of detailed geological models and rock mass models.
• Numerical modelling
  Stability assessments through continuum and discontinuum numerical analysis.