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Author(s):	Lieb, R. H.
Title:
Abstract:	The management of the handling of approximately 25 m tonnes of spoil material from the Gotthard Base Tunnel was and still is an enormous challenge. A permit system for concrete mixes and continuous testing of the excavated raw material and the grading of the broken rock ensure that as much spoil material as possible can be reused for the production of high-quality concretes and shotcretes for the construction of the tunnel. Although a generous margin has been applied to forecasts in materials management since the start of the project, extensive alterations were necessary to the plans and facilities for materials management to deal with the actual development of the project. The main reasons for this were changes to the schedule of material production and requirements and changes of material quantities within and between the individual sections. It has proved possible so far to avoid materials management becoming a factor holding back the performance. Die Bewirtschaftung der rund 25 Mio. Tonnen Ausbruchmaterial des Gotthard-Basistunnels war und ist eine enorme Herausforderung. Ein Zulassungssystem für Betonrezepturen sowie laufende Prüfungen am ausgebrochenen Rohmaterial und den aufbereiteten Gesteinskörnungen stellen sicher, dass möglichst viel Ausbruchmaterial wiederverwertet wird und damit hochwertige Betone und Spritzbetone für den Tunnelbau hergestellt werden. Obwohl seit Projektbeginn in der Materialbewirtschaftung mit großzügigen Prognosebandbreiten gearbeitet wurde, waren aufgrund der tatsächlichen Projektentwicklung umfangreiche Anpassungen an den Konzepten und Anlagen der Materialbewirtschaftung erforderlich. Die Hauptgründe dafür sind zeitliche Verschiebungen von Materialanfall und -bedarf sowie Veränderungen der Materialmengen innerhalb und zwischen den einzelnen Teilabschnitten. Bisher ist es gelungen die Materialbewirtschaftung nicht zum leistungsbestimmenden Faktor werden zu lassen.
Source:	Geomechanics and Tunnelling 2 (2009), No. 5
Page/s:	619-626
Language of Publication:	English/German

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