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Bergheim, Australia

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


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. Source


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. Source


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. Source


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. Source

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