Original caption
Miniature tunneling engineering in action! 🚇⚙️ This ultra-realistic scale model demonstrates how a Tunnel Boring Machine (TBM) excavates underground while simultaneously installing precast concrete tunnel lining segments behind the cutter head. This method minimizes surface disruption, reduces vibration, and enables the safe construction of metro systems, highway tunnels, and utility corridors beneath busy cities. #fblifestyle #TunnelBoringMachine #TBM #UndergroundConstruction