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Every tunnel project is unique. Brierley’s understanding of site-specific ground conditions and behavior is combined with our extensive work with contractors and resulting insight into how tunnels and underground structures are actually built (not just on paper). This enables us to develop practical, constructable solutions for each project.

Because of our unique specialization, Brierley Associates offers world-renowned experience and expertise that few other firms possess.  Our tunnel and geotechnical design engineers, geologists, geostructural  engineers and blasting specialists work together to solve underground design and construction challenges. Timely and cost-effective delivery of accurate and highly focused information to our clients, while achieving a practical balance of risk and constructability is key to our success.

In-House Tunnel and Shaft Expertise:

  • Design of hard rock and soft ground tunnels, shafts, caverns, chambers, and microtunnels
  • Shaft and tunnel support of excavation design
  • Shaft and tunnel permanent lining design including pre-cast segmental liners
  • Feasibility and constructability evaluation
  • Ground improvement and grouting design
  • Construction dewatering design
  • Blasting design and construction vibration analysis
  • Tunnel inspection, mapping and condition assessment
  • Rehabilitation and repair design
  • 3D finite element analysis modeling
  • Geotechnical data and geotechnical baseline reports (GDR’s & GBR’s)
  • Geotechnical instrumentation
  • Value engineering
  • BIM and virtual design and construction
  • Forensic engineering, claims analysis and construction dispute resolution



Our Tunnels and Shafts Team