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Abstract:	The paper describes the introduction of NATM in Brazil and the developments, which contributed to applications in local geological conditions. An unsuccessful application in the early stages significantly contributed to the development of practices for assistance during construction and systems to help with instrumentation interpretation. Successful applications, which resulted in remarkable results in terms of cost and construction time, are also presented. The evolution of contract types is described, as well as their consequences for the outcome of the projects. Der Beitrag befasst sich mit der Einführung der NÖT in Brasilien und den Entwicklungen, die zur Anwendung der Methode unter den lokalen geologischen Bedingungen beigetragen haben. Ein früher Fehlschlag trug entscheidend dazu bei, dass bauunterstützende Verfahren und Systeme zur Unterstützung bei der Messdateninterpretation entwickelt wurden. Weiterhin werden erfolgreiche Anwendungen, die ausgesprochen kostengünstig waren und in kurzer Zeit ausgeführt wurden, vorgestellt. Die Entwicklung der Bauverträge und deren Auswirkungen auf den Erfolg von Projekten werden diskutiert.
Source:	Geomechanics and Tunnelling 5 (2012), No. 5
Page/s:	431-437
Language of Publication:	English/German

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