Tunnel Design for Prague Metro Line D | Tunnels & Tunnelling

Key Takeaways

• Nové Dvory uses a mined cavern with mid‑station dome
• Dual escalators rise steeply within the underground station
• Turnout tunnels rest on reinforced concrete pillars for branching
• Design integrates two‑way excavation to accelerate construction
• Procurement and programme constraints drive innovative tunnel sequencing

Pulse Analysis

Prague’s ambitious Line D expansion reflects the city’s push to modernise its transit network, targeting a 2029 opening for the first segment. Mott MacDonald, a global engineering consultancy, is steering the tunnel design for the flagship Nové Dvory station, leveraging two decades of underground expertise. By opting for a mined large‑rock cavern rather than cut‑and‑cover, the project minimizes surface disruption in a densely built historic district, while delivering a spacious three‑aisle layout that can handle projected passenger growth.

The station’s engineering hinges on a mid‑station dome that enables two‑way excavation, a technique that reduces overall construction time and mitigates risk of ground settlement. Steep escalator shafts are integrated directly into the cavern walls, demanding precise alignment and robust support systems. Turnout tunnels, essential for future line branching, are anchored on reinforced‑concrete pillars, offering both structural stability and flexibility for network extensions. Advanced 3D modelling and verification workflows support these complex geometries, ensuring compliance with stringent European safety standards.

Beyond Prague, the design showcases how innovative tunnelling methods can address common challenges in urban metro projects—tight schedules, budget pressures, and intricate underground conditions. The emphasis on procurement efficiency and programme realism resonates with transit authorities across Europe seeking to accelerate delivery without compromising quality. As cities worldwide grapple with aging infrastructure, the Nové Dvory example provides a replicable template for integrating large‑scale mined stations into existing networks, potentially reshaping how future metros are built.