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 Current Projects / Brenner Base Tunnel, hydraulic and geotechnical in situ tests
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The Brenner Base Tunnel is the heart of the trans-European railway axis Berlin- Verona/Milan-Bologna-Napels-Messina-Palermo. The about 55 km long tunnel, between Innsbruck (A) and Franzensfeste (I), will cross technically difficult formations. There are mainly aquiferous and tectonically fractured rocks to penetrate of the Brenner fault zone.
The project is managed by the European company "Galleria di Base del Brennero - Brenner Basistunnel BBT SE" (www.bbt-se.com). In order to generate a well-engineered project, a extensive investigation program with more than 100 boreholes was initiated in April 2003. Solexperts was contracted to investigate the geotechnical and hydraulic properties of the encountered formations in specified sections of deep boreholes up to a depth of 1350 m. The borehole tests consisted of rock stress measurements*, dilatometer tests and hydraulic packer tests together with deep -dependent water sampling.
So far more than 90 dilatometer tests and over 140 hydraulic tests with up to depths of 1200 m were carried out. The Solexperts Heavy-Duty Double Packer System (HDDP) was used for hydraulic characterisation and water sampling and the Solexperts Dilatometer System for the determination of the deformation properties.
The standard measuring systems of Solexperts allow tests in a diameter range between 96 mm and 160 mm.
* carried out by MeSy inc. (Germany) under direction of Solexperts |
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| Installation of the Heavy Duty - System for hydraulic testing. In the foreground the flat pack cable with measuring- (pressure tranducers) and pressure lines (packers). |
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Winter fieldwork near Brenner Pass |
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| Documentation of the conducted hydraulic tests |
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