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Schruns, Austria

Ruegg C.,Amberg Engineering Ltd. | Wannenmacher H.,Amberg Engineering Ltd. | Schonlechner C.,Jager Bau GmbH
Underground - The Way to the Future: Proceedings of the World Tunnel Congress, WTC 2013

In populated alpine regions, infrastructure projects often compete with nature and the general public for open space or other natural resources. The Waferfab project located near Sargans, Switzerland, is a groundbreaking infrastructure project using underground space as a manufacturing facility for sensitive industrial processes which requires strict vibration and temperature control. Waferfab is a multiple-structure complex with the main office situated on the surface connected to two main caverns, which serve as the production and storage facilities, by two access galleries with a length of about 100 m each. The combined central utility building solution including a shallow cavern was compared with an open green-field solution in terms of accessibility, safety and economical criteria. The combined central utility building solution showed a high potential for cost savings during construction and operation, mainly due to natural cooling effects and constant climate conditions throughout the year. © 2013 Taylor & Francis Group. Source

Moritz B.,OBB Infrastruktur AG | Radoncic N.,Geoconsult Salzburg ZT GmbH | Helmberger A.,IL Ingenieurburo Laabmayr and Partner ZT GmbH | Uschan R.,Jager Bau GmbH
Geomechanik und Tunnelbau

The paper deals with the challenge on structural analysis, logistics as well as on geotechnical aspects during sinking of an approximately 60 m deep construction shaft with a cross-sectional area of about 720 m2 at the Koralm Tunnel lot KAT 2. Numerical 3D simulations were used for the structural analysis. The results in terms of level of loading of the support measures and the displacements served as a basis for predicting the system behaviour of the shaft. During sinking, the behaviour of the shaft and surface was continuously monitored within the geotechnical safety management by means of 3D displacement measurements, measurement of strains in the shotcrete lining and measurements of pile inclinometers. Thereby a continuous target-performance comparison was accomplished. Special characteristics in the design and construction phase are illustrated and discussed. © 2013 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

The 4.2 km Eyholz tunnel is part of the autobahn A9 and is the essential element in the bypass of Visp in the canton Valais, Switzerland. The tunnel passes through geologically problematic and also tectonically highly stressed zones (Rhone-Simplon fault). The excavation of the two two-lane bores is being performed conventionally, by blasting and also in loose material. The interesting structures include the underground junction caverns, where slip roads to join and leave the autobahn are included in the tunnel, resulting in cross-sections of up to 300m2 having to be excavated. The overburden areas near the portals were excavated with tunnel excavators under the protection of elaborate jetted canopies. The two tunnel bores are being excavated in parallel and are connected with crosscuts every 270 m. As is typical for recent Swiss autobahn tunnels, a service duct is constructed under the carriageway. The inner lining of the main bores is progressing at the same time as the excavation and also the lining of the cavern with in-situ concrete. The first bore should open for traffic in 2013. © 2010 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

Gutter W.,Jager Bau GmbH | Jager M.,Jager Bau GmbH | Rudigier G.,Jager Bau GmbH | Weber W.,Jager Bau GmbH
Geomechanik und Tunnelbau

The selection of the correct method of tunnelling from the contractor's point of view mostly depends on its chance to survive the competition of the marketplace, in addition to a host of technical constraints. The tendering and award conditions also decisively influence whether the technically and economically optimal solution is chosen. There are also other factors like the market situation, availability of suitable tunnelling machinery and personnel resources, which can have a significant effect on the decision process. © 2011 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin. Source

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