81K views · 1.5K reactions | 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 | Facebook

TBM Used in Himalayas for India’s Longest Railway Tunnel Construction Devprayag – In a first for the Himalayas, a Tunnel Boring Machine (TBM) is being used to construct Tunnel T8 under the Rishikesh-Karnaprayag Rail Project. The 14,587-meter-long tunnel is being built using both TBM and NATM (New Austrian Tunneling Method) technologies, enabling faster excavation and lining. Tunnel T8 begins at the upcoming Devprayag Railway Station and ends at Janasu Railway Station. A breakthrough is expected

🔵 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