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Gschwandtner G.G.,IC Consulenten | Hohndorf M.,OBB Infrastruktur AG | Ubleis M.,3G Gruppe Geotechnik Graz
Geomechanik und Tunnelbau | Year: 2015

The Granitztal tunnel chain, located after the Koralm Tunnel in a southward direction and adjoining the new IC station in the Lavanttal, essentially consists of the Deutsch Grutschen and Langer Berg Tunnels, which are being excavated cyclically, and the Granitztal gallery in cut-and-cover. The article offers a general overview of the project, described the geological and geotechnical conditions and compares the experience gained in the current early construction phase with the underlying conditions for design and tendering. Die Tunnelkette Granitztal in südlicher Richtung gesehen nach dem Koralmtunnel sowie anknüpfend an den neu zu errichtenden IC Bahnhof im Lavanttal umfasst im Wesentlichen die Tunnel Deutsch Grutschen und Langer Berg, die im zyklischen Vortrieb aufgefahren werden, sowie geographisch dazwischenliegend die Einhausung Granitztal, die in offener Bauweise erstellt wird. Der Beitrag gibt eine allgemeine Projektübersicht, beschreibt die geologischen und geotechnischen Verhältnisse und betrachtet die in der aktuellen frühen Bauphase gewonnenen Erkenntnisse mit den der Planung und Ausschreibung zugrunde liegenden Gegebenheiten. © 2015 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

Posch H.,ZT GmbH | Otto R.,3G Gruppe Geotechnik Graz | Huber H.,Sachverstandiger | Murr R.,Poyry | And 2 more authors.
Geomechanik und Tunnelbau | Year: 2015

Contract KAT2 will produce about 8.6 m. t of material excavated from the tunnel. In the course of the design work, maximum reuse of this material was intended, always considering economics and while reducing the environmental impact by minimizing transport and saving resources. More than half of the suitable tunnel spoil will be preliminarily screened and then processed for the production of aggregates for concrete production. After the first year of production, the high losses associated with the preliminary screening and processing demanded measures to improve the processing, which led to an improvement of the recycling quota. The aggregates produced on site so far fulfil the technical requirements for concrete production, even for high strength concrete grades. © 2015 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

Radoncic N.,Geoconsult Salzburg ZT GmbH | Holzl H.,Geoconsult Salzburg ZT GmbH | Moritz B.,OBB Infrastruktur AG | Bacher W.,3G Gruppe Geotechnik Graz
Geomechanik und Tunnelbau | Year: 2013

The Paierdorf ventilation facility is a part and a preparatory contract for the Koralm Tunnel KAT 3 contract, and is situated approximately 3.7 km from the western portal. It consists of a vertical 120 m deep shaft, an 88 m long expanded section of the south tunnel, access tunnel/TBM entry cavern, an approximately 100 m section in the north tunnel and a ventilation tunnel having a length of around 93 m. The shaft, the access tunnel and the top heading of the south tunnel had already been constructed during the extended exploratory programme of the Koralm Tunnel. The TBM entry cavern, the segment of the north tunnel as well as the section in the south tunnel and the ventilation tunnel were then added in 2012. The ventilation tunnel crosses over the south tunnel with a minimal separation of 2.8 m and connects to the vertical shaft. This geometrical arrangement results in complex geometry of the underground structure and complex geotechnical interaction between the parts. This paper concentrates on the prediction of system behaviour in the design phase with 2D and 3D numerical calculations and the comparison of predicted with observed behaviour during construction. © 2013 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

In order to preserve the environment and save resources, Austrian Railways ÖBB have decided to recycle material excavated from contract KAT 2 of the 32.9 km long Koralm Tunnel and process it as aggregates for concrete production. This leads to a saving of gravel resources, reduction of transport routes and reduction of the required landfill areas. The rock mass, which is predominantly formed of schistose gneisses and gneisses with inclusions of mica schist, amphibolites and marbles, is being bored by tunnel boring machines. The material excavated from the tunnel is being recycled on site by processing for concrete aggregates. © 2013 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

Schubert P.,IC consulenten ZT GesmbH | Holzl H.,Geoconsult ZT GmbH | Sellner P.,3G Gruppe Geotechnik Graz | Fasching F.,3G Gruppe Geotechnik Graz
Geomechanik und Tunnelbau | Year: 2010

One of the main goals of the ground investigation for the Koralm Tunnel project was the detailed investigation of the Lavanttal fault systemwhich lies in the contact between the Koralm crystalline and the neogenic formations of the Lavanttal. The above-ground investigation programme (mapping, core drilling, geophysics) was able to deliver the first estimation of the geological, hydrogeological and geotechnical rock conditions of the fault zone many hundreds of metres thick (fig. 1). The Paierdorf investigation tunnel, which has now been constructed, clarified the thickness and the internal structure of the fault zone as well as the hydraulic and mechanical rock properties along the tunnel. Equally important was the practical experience gained by tunnelling through the fault zone. The knowledge gained from the Paierdorf investigation tunnel will be used in further design work for the mechanical driving of this very heterogeneous region of rock. © 2010 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. Source

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