##  [New Austrian Tunneling Method (NATM)](/new-austrian-tunneling-method-natm) 

  ##  [New Austrian Tunneling Method (NATM)](https://engineering.quantumdictionary.io/new-austrian-tunneling-method-natm-0) 

  

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**Engineering & Applied Technologies Dictionary**

 







 

 

 

 



 

 

 

 

Definition

A tunnelling approach that advances a tunnel in small sequential excavations and applies immediate, generally flexible support while relying on controlled mobilization of the surrounding ground; supports and final lining are chosen and adjusted on the basis of systematic monitoring and observational feedback rather than a single fixed support design.