Tunnels & Underground.
Life safety engineering beneath the surface
Tunnel Kilometres
Underground Stations
CFD Simulations Delivered
Tunnels & Underground.
We delivered ventilation design, fire life safety, and emergency systems engineering for road tunnels, rail tunnels, and deep-level underground stations spanning over 200 kilometres of subterranean infrastructure. Our CFD-driven approach to longitudinal, transverse, and hybrid ventilation strategies has been validated on projects from the HS2 Chiltern Tunnels to Middle Eastern highway underpasses, ensuring tenable conditions for evacuation and firefighter intervention.
Challenges & Solutions.
Key Challenges
Designing ventilation systems that maintain tenable conditions during tunnel fire events
Engineering emergency egress routes and cross-passage spacing in long-distance tunnels
Modelling fire scenarios with heat release rates exceeding 200 MW for road tunnel applications
Integrating SCADA-controlled ventilation with fire detection and traffic management systems
Ensuring structural fire protection for segmental linings and cut-and-cover tunnel sections
Our Solutions
1D and 3D CFD ventilation simulation using SES, IDA Tunnel, and FDS for tenability verification
Cross-passage and egress design compliant with NFPA 502, BD 78/99, and RABT guidelines
Multi-scenario fire modelling covering HGV, tanker, and pool fire events with validated HRR curves
Integrated controls philosophy linking jet fans, dampers, CCTV, and linear heat detection
Passive fire protection specification for tunnel linings, structural elements, and service supports
Capabilities.
Related Expertise.
Featured Tunnels & Underground Projects.
Need engineering support for tunnels & underground?
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