Bergheim, Australia
Bergheim, Australia

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Horner J.,iC consulenten ZT GesmbH | Naranjo A.,AngloGold Ashanti | Weil J.,iC consulenten ZT GesmbH
Geomechanik und Tunnelbau | Year: 2016

Digital data acquisition, data management and 3D modelling techniques are common techniques in the mining industry. On the other hand, civil engineering projects still lag behind in applying advanced technologies during geological reconnaissance and investigation. The La Colosa gold mining project (Colombia) is presented as an example, where sophisticated digital mapping techniques and 3D geological modelling is not only used for mining related issues, but is also successfully applied for the geological, geotechnical and hydrogeological investigations of adjacent civil engineering sites of the associated mine infrastructure. © 2016 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


Daller J.,iC consulenten ZT GesmbH | Diewald M.,PORR Bau GmbH Tunnelbau | Lemmerer J.,OBB Infrastruktur AG Streckenmanagement und Anlagenentwicklung | Zwittnig G.,OBB Infrastruktur AG
Geomechanik und Tunnelbau | Year: 2016

The 13.35 km long Wienerwald (Vienna Woods) Tunnel forms a key element of the new railway line between Vienna and St. Pölten. The 11 km long twin-tube western section of the tunnel was constructed using two tunnel boring machines, type TBM-S, with an excavation diameter of approximately 10.7 m, and a water pressure-relieved, double shell lining system. A Swiss unsealed, stacked segment lining system was used. In the year 2000, a TBM with these dimensions represented new territory for ÖBB-Infrastructure AG, so intensive investigations of the technology were undertaken from the feasibility study and permit application phases onwards. Risk analyses in respect of geotechnical engineering, TBM design and segmental tunnel lining, cross-checking of the construction schedule and costs that were estimated during the tender phases were undertaken. Together with a comprehensive and thorough investigation, this led the client to the conclusion that the tunnelling work in the western section should be tendered with two alternatives (conventional tunnelling and TBM drive). Appropriate tender evaluation criteria allowed an objective comparison of the submitted tenders to be made and resulted in an unproblematic contract with the western section being awarded for the TBM system. The expectations of the client and the contractor with regard to geology and geotechnics, construction schedule and construction process are described. Deviations from these expectations and the actual technical and construction difficulties encountered are explained, along with the corresponding solutions that were used to overcome these problems. Der 13,35 km lange Wienerwaldtunnel stellt das Kernstück der Neubaustrecke Wien-St. Pölten dar. Der zweiröhrige Westabschnitt des Tunnels wurde über eine Länge von rd. 11 km mit zwei Tunnelbohrmaschinen TBM-S, Ausbruchsdurchmesser rd. 10,7 m und druckwasserentlastetem, zweischaligen Ausbau hergestellt. Als Tübbingsystem wurde ein ungedichteter Schweizer Stapeltübbing gewählt. TBM-Vortriebe in dieser Dimension waren Anfang 2000 für die ÖBB-Infrastruktur AG Neuland, und so befasste sie sich schon bei den Machbarkeitsstudien und den behördlichen Einreichungen intensiv mit dieser Technologie. Risikoanalysen zu Geotechnik, Maschinentechnik, Tübbingausbau, Bauzeit und Kosten in den Phasen Einreichung und Ausschreibung sowie eine umfangreiche Erkundungskampagne ließen den Auftraggeber zu dem Schluss kommen, die Vortriebsarbeiten im Westabschnitt in zwei Varianten (zyklisch und TBM-Vortrieb) auszuschreiben. Entsprechend gewählte Zuschlagskriterien ermöglichten einen objektiven Vergleich der Angebote und eine einspruchsfreie Vergabe des Westabschnitts zugunsten der Variante mit TBM-Vortrieben. Die Erwartungen des Auftraggebers (AG) und des Auftragnehmers (AN) werden hinsichtlich Geologie und Geotechnik, Bauzeit und Bauablauf sowie Vertragsabwicklung dargelegt. Die Abweichungen und tatsächlich aufgetretenen, technischen und bauwirtschaftlichen Schwierigkeiten sowie deren Lösungen werden erläutert. © 2016 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin


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.


Ekici Z.,IGT consulting engineers | Ruegg C.,Amberg Engineering AG | Wilfinger N.,viglconsult ZT | Wagner O.K.,OBB Infrastruktur AG | Weigl J.,iC consulenten ZT GesmbH
Geomechanik und Tunnelbau | Year: 2011

The approved alignment of the "New Semmering Base Tunnel" was divided into sections according to the three aspects risk, geotechnics and construction operations, in which either only sequential tunnelling or both methods, sequential or continuous mechanised, could be used. © 2011 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co.


The 5.65 km long Thirra motorway tunnel experienced major problems during the summer of 2009 in a central 1,000 m long section through a fault zone with 500 m overburden. The tunnel showed large convergence, settlement and invert heave. In early November 2009, a 60 m long section of the south tube collapsed. A team of tunnel consultants including Dr. Sauer and iC were engaged to analyze the situation and make suggestions for a modified design. This resulted in a completely new concept for re-profiling, re-mining the collapse and inner lining. The basic principles followed were optimization of the shape to near-circular, very short ring closure and stiff lining. This concept was implemented by the contracting JV at record speed and worked perfectly. The displacements of the primary lining were very small and the loads within limits.


The author shortly reviews the requirements of the Eurocode 7 regarding the Observational Method for use during tunnel construction. The particularities and problems of applying the Observational Method at deep tunnels are listed. A recommendation is given to improve the situation and to bring the approaches used in normal ground engineering problems and deep tunnels closer together. © 2010 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co. KG, Berlin.


Wagner H.,OBB Infrastruktur AG | Zwittnig G.,OBB Infrastruktur AG | Daller J.,iC Consulenten ZT GesmbH | Fasching A.,3GGruppe Geotechnik Graz ZT GmbH
Geomechanik und Tunnelbau | Year: 2011

In an early planning phase for the Granitztal tunnel chain, which forms part of the Koralm railway running between Graz and Klagenfurt, Austria, the continuous tunnelling method has been taken into consideration, at least in some sections, in addition to sequential or conventional tunnelling. This paper deals with the investigations that eventually led to the decision to consider both tunnelling methods in the detailed tender design for one section of the tunnel chain, and to let competition decide which tunnelling method to choose. © 2011 Ernst & Sohn Verlag für Architektur und technische Wissenschaften GmbH & Co.

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