The article describes the fundamental geotechnical model assumptions in the design phase of the Semmering Base Tunnel. Two selected case studies show the verification of the geotechnical model during tunnel construction. The verification process is essentially based on geotechnical monitoring in combination with specific back analyses. It is shown that particularly in complex geotechnical conditions, such as deep tunnels in weak rock mass, the designer can only assess a range of expected behaviour. Most information about system behaviour and thus about the geotechnical model conceptions can only be gained during construction. An improved understanding of the geotechnical model provides the potential to identify and minimize geotechnical risks earlier and to adapt excavation and support measures to the actual conditions.

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geotechnical monitoring verification

Gerold Lenz, Alexander Poisel, Markus Brandtner, Andreas Goricki, Oliver K. Wagner,.Semmering Base Tunnel – Geotechnical models in design and construction. 11 (11),559-565.

Gerold Lenz, Alexander Poisel, Markus Brandtner, Andreas Goricki, Oliver K. Wagner,"Semmering Base Tunnel – Geotechnical models in design and construction" 11

Gerold Lenz, Alexander Poisel, Markus Brandtner, Andreas Goricki, Oliver K. Wagner,"Semmering Base Tunnel – Geotechnical models in design and construction"