🔵 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
🔵 New Post 🚀 The New Austrian Tunnelling Method (NATM) is base…
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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
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A tunnelling project in Austria. The New Austrian Tunnelling Method (…
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30K views · 916 reactions | For almost 4 years we’ve been fitting out the Metro Tunnel with a world-class communications system. We’ve installed hundreds of kilometres of cabling for things like our new signalling technology, driver radio systems, and - among other things - phone reception. The team recently put the system through one of its biggest tests yet, making the first phone call from the Metro Tunnel. | Metro Tunnel | Facebook
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30K views · 916 reactions | For almost 4 years we’ve been fitting …
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The New Austrian Tunneling Method (NATM) | Viresh Dhankai, Electrifier Expert, CAPP®
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