The NATM Tunnel Formwork System is designed for the construction of underground tunnels, culverts, and similar cylindrical underground structures.

All components in the system are designed to be assembled in various configurations. Thanks to this flexible structure, cost-effective and large cross-section tunnel solutions can be achieved, even under varying shapes and loads.

Tunnel cross-sections are typically designed in circular or horseshoe shapes, depending on their function and the geological structure. Tunnel concreting is generally carried out in two main sections: the invert and the arch.

In common practice, the axis concrete serves both as the foundation for the invert formwork and as the base for the rail system that guides the formwork. This structure ensures safe and accurate positioning of the formwork system in both circular and horseshoe-shaped tunnels.

NATM TUNNEL FORMWORK SYSTEM FEATURES

• Easy assembly thanks to its modular structure

• Flexibility

• Fast and safe operation

• Savings in labor and time

• Adaptability to various project types

• Ease of concrete pouring and integration with vibration systems

• High load-bearing capacity and resistance to concrete pressure