Tunnelling

GHD’s Tunnelling capability is centred around two specialist groups in Melbourne and Brisbane. These groups have extensive experience in both hard rock and soft ground tunnel and underground space design.

GHD’s technical tunnelling solutions are characterised by innovation and a focus on our clients’ needs.

GHD’s skilled Tunnel Engineers are equipped to provide input during all stages of a tunnelling project from planning and design through to project management. Our experience has been enhanced through the delivery of award winning technical solutions to both contractors and client organisations throughout Australia and Internationally.

We offer specialist skills and services in the following areas:

• Tunnel and underground space ground support design
• Tunnel geotechnics
• Tunnel structures
• Tunnel fire life safety
• Tunnel mechanical and electrical systems
• Tunnel materials technology
• Tunnel risk assessment
• Tunnel ventilation
• Tunnel project finance

Our technical tunnelling experience has recently been showcased on a range of tunnel solutions, including:

• TBM driven tunnels with steel fibre reinforced precast concrete segmental linings for water and waste water projects in soft soils
• Hard rock TBM and drill and blast driven tunnels for hydropower projects
• Cut and cover rail tunnels across waterways
• Underground railway station cavern design with wide spans (25m) and shallow cover (15m)
• Curved pipe jacked tunnels for water supply pipelines and sewers
• Unreinforced monolithic concrete lining design for busway and road tunnels
• Undersea hand-mined and TBM driven tunnels for seawater desalination projects
• TBM launch chamber design using contiguous flight auger piles
• Precast concrete caissons and shaft segments for below ground pump stations