Schruns, Austria
Schruns, Austria

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Langle T.,Jager Bau GmbH | Kappeli L.,Jager Bau GmbH
Geomechanik und Tunnelbau | Year: 2010

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.


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 | Year: 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.


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 | Year: 2013

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.


Gutter W.,Jager Bau GmbH | Jager M.,Jager Bau GmbH | Rudigier G.,Jager Bau GmbH | Weber W.,Jager Bau GmbH
Geomechanik und Tunnelbau | Year: 2011

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.


Schonlechner C.,Jager Bau GmbH | Bitschnau M.,Jager Bau GmbH
Geomechanik und Tunnelbau | Year: 2016

The joint venture Bau Obervermuntwerk II, consisting of the companies Jäger Bau, Porr, Östu-Stettin and Hinteregger are constructing the pumped storage works Obervermunt II (OVW II) under a contract from the Vorarlberger Illwerke AG between the Silvretta and the Vermunt reservoirs. The Obervermuntwerk II is being built as a parallel works to the existing Obervermuntwerk (OVW). Together with the OVW II, a new headrace is being built for the existing Obervermuntwerk and the existing overground penstock will be demolished. All excavation is being undertaken conventionally by drill and blast; only the surge tank and the pressure shaft will be excavated by raise boring previously excavated mucking shafts. The aggregates for the concrete of the Obervermunt II power station (about 200,000 m3) are being prepared from excavated material as far as possible. A dedicated material processing plant for the project is being operated in Vermunt as well as a batching plant. Die Arbeitsgemeinschaft Bau Obervermuntwerk II, bestehend aus den Firmen Jäger Bau, Porr, Östu-Stettin und Hinteregger errichtet im Auftrag der Vorarlberger Illwerke AG zwischen dem Speichersee Silvretta und dem Speichersee Vermunt das Pumpspeicherwerk Obervermunt II (OVW II). Das Obervermuntwerk II wird als Parallelwerk zum bestehenden Obervermuntwerk (OVW) errichtet. Mit der Errichtung des OVW II wird auch eine neue Triebwasserführung für das bestehende Obervermuntwerk hergestellt und die bestehende oberirdische Druckrohrleitung abgetragen. Sämtliche Ausbrucharbeiten erfolgen konventionell im Sprengvortrieb, lediglich beim Wasserschloss und dem Druckschacht werden mittels Raiseboring vorab Schutterschächte hergestellt. Die Zuschlagstoffe für den Beton des Kraftwerks Obervermunt II (ca. 200.000 m3) werden so weit wie möglich aus dem Ausbruchmaterial aufbereitet. Für diese Maßnahme wird im Bereich Vermunt eine eigene Materialaufbereitungsanlage sowie eine Betonmischanlage betrieben. © 2016 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin

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