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To meet the demands of economic growth, urbanization and increased mobility, tunnels and underground spaces are increasingly required to provide vital links that are fast, efficient, resilient and sensitive to the environment. Our tunnels team holds extensive experience in underground space design and construction, and can produce solutions which effectively meet these growing demands.

Drawing on our depth of international experience, GHD is well positioned to provide routine design as well as expert services for all phases of tunnel and underground space projects.

Our people have worked on some of the most iconic tunnel projects around the world. We continue to push technical boundaries and have achieved key milestones and optimum outcomes in soft soil to hard rock environments. Our experience has grown through the delivery of award winning technical solutions to both contractors and client organizations internationally.

GHD offers comprehensive services throughout the project and tunnel lifecycle. We collaborate closely with our clients, partners and stakeholders to challenge design and construction practices and seek opportunities to save time, money and resources. We apply these services to the benefit of many clients within the transport, water, mining and power sectors and also to existing asset owners.

Our capabilities include:

  • Constructability reviews
  • Cut-and-cover, drill-and-blast, NATM, TBM, pipejacking, HDD and microtunneling
  • Design of launch chambers, temporary shafts, manholes and caverns
  • Expert advice
  • Fire life safety
  • Geotechnical investigations and assessments
  • Ground-structure interaction analysis including numerical modeling
  • Identifying and mitigating environmental issues
  • Inspection, assessment and remediation of existing tunnels
  • ITIG JCOP compliance/due diligence reviews
  • Materials technology
  • Mechanical and electrical systems
  • Noise, vibration and air quality modeling and analysis
  • Project procurement advice
  • Risk assessments
  • Road, rail, sewerage, water supply, hydropower, desalination plant and utility tunnels
  • Structural design and analysis
  • Ventilation systems

Our services include:

  • Commissioning and decommissioning
  • Construction phase supervision
  • Detailed design
  • Expert witness
  • Feasibility studies
  • Inspections
  • Planning
  • Project management
  • Tender phase design
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