A tunnelling project in Austria. The New Austrian Tunnelling Method (NATM) is a technique for constructing tunnels that emphasises flexibility and adaptability to geological conditions encountered during excavation. Developed in the 1950s and 1960s in Austria, it was dubbed the "New Austrian Tunnelling Method" to distinguish it from traditional tunnelling approaches. While there wasn't necessarily an "old" method exclusive to Austria, the country's long history of tunnel construction and its foc

The New Austrian Tunnelling Method (#NATM), which is Also known as the sequential excavation method (#SEM) Or Sprayed Concrete lining method (#SCL) developed between 1957- 65 in #Austria. It is referred to as a “design as you go” approach. | Megha Engineering and Infrastructures Ltd

🔵 New Post 🚀 The New Austrian Tunnelling Method (NATM) is based on the principle of mobilising the ground’s inherent strength to ensure stability. The diagram illustrates a double core excavation sequence, where the tunnel is divided into top heading, bench, and invert sections. Sequential excavation and immediate application of shotcrete with lattice girders and rock bolts allow stress redistribution, minimising deformation. The field image shows the practical implementation of this method, h

The New Austrian Tunnelling Method, or NATM, is a modern and effective tunnelling technique. It leverages the natural strength of the surrounding rock and is adaptable to various geological conditions. MEIL has incorporated this tunnelling technique to provide last-mile connectivity in multiple projects, including the Zojila Road Tunnel, Char Dham Tunnel and the Tejaji Nagar-Balwara Road Projects. #tunneling #newaustriantunnellingmethod #ZojilaTunnel #tunnelengineering #chardhamrailtunnel #Shotc