How do you de-risk what you can’t see?

Tunnelling projects will always involve some uncertainty. But when underground risks are not understood early, even relatively small issues can delay design, disrupt construction and create cascading impacts across the wider project.

In this video, Ehsan Nasiri, Technical Lead – Transit Tunnel at GHD, explains why tunnelling risk cannot be eliminated or simply priced into a project. Ehsan shares how targeted geotechnical investigation, informed judgement and proactive planning can help teams identify high-consequence risks, reduce costly surprises and make better decisions before design and construction advance.

• why tunnelling uncertainty cannot be fully eliminated, even with extensive investigation
• how teams can prioritise high-consequence risks and address them through design, mitigation or avoidance
• why understanding underground conditions early can prevent delays and project-wide disruption

Watch the video to explore how proactive investigation can turn tunnelling uncertainty into informed decisions and help prevent risk from becoming a bigger project problem.