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by wickedwillie on September 28th, 2004

wickedwillie

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What is the New Austrian Tunnelling method ?

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  • by sridhar srinivasan on June 18th, 2005

    sridhar srinivasan

    The New Austian Tunneling method (NATM) was developed between 1957 and 1965 in Quick Facts about: Austria
    A mountainous republic in central Europe; under the Habsburgs (1278-1918) Austria maintained control of the Holy Roman Empire and was a leader in European politics until the 19th centuryAustria. It was given its name in Quick Facts about: Salzburg
    City in western Austria; a music center and birthplace of MozartSalzburg in 1962 to distinguish it from old Austrian tunnelling approach. The main contributors to the development of NATM were Ladislaus von Rabcewicz, Leopold Müller, and Franz Pacher.

    The NATM is an approach of Quick Facts about: philosophy
    The rational investigation of questions about existence and knowledge and ethicsphilosophy integrating the principles of the behaviour of rock masses under load and monitoring the performance of underground construction during construction. The fact is that the NATM is not a set of specific excavation and support techniques.
    Müller listed 22 principles of NATM. There are seven most important features on which is NATM based:
    Mobilisation of the strength of rock mass
    Shotcrete Protection
    Measurements
    Flexible support
    Closing of invert
    Contractual arangements
    Rock mass classification determines support measures

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