Overcoming Multiple Caverns: Successful TBM Tunneling in Karstic Geology at Galerie des Janots

In April 2019, a 3.5 m diameter open-type Main Beam TBM and its crew broke through at the Galerie des Janots Tunnel in La Ciotat, France. The 2.8 km long tunnel, excavated in limestone known to have groundwater, karstic features, and voids, took two years to complete due to challenges including two uncharted caverns – the largest of which measured a staggering 8000 m³ in size (Fig 1).

Upgrading the Water Supply

Galerie des Janots is one of the 14 operations designed to save water and protect resources, which are being carried out by the Aix-Marseille-Provence metropolis, water agency Rhône Mediterranean Corsica, and the French State Government. The Janots gallery will improve access to water in the communities east of the Aix-Marseille-Provence metropolis (Cassis, Roquefort-la-Bédoule, La Ciotat and Ceyreste). The future pipeline will replace existing pipelines, currently located in a railway tunnel, that have significant safety and vulnerability deficiencies with...

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Issue 2019-03 France | Frankreich

Galerie des Janots: TBM hits two uncharted Caverns

In April 2019, a Robbins 3.5 m diameter Main Beam TBM broke through into open space, completing the 2.8 km long tunnel Galerie des Janots in France. It was not the first time the machine had...

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Overcoming Multiple Caverns: Successful TBM Tunneling in Karstic Geology at Galerie des Janots

Upgrading the Water Supply Galerie des Janots is one of the 14 operations designed to save water and protect resources, which are being carried out by the Aix-Marseille-Provence metropolis, water...

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Issue 2017-03

Tunnelling in Malaysia

In Malaysia, tunnelling took on an important change in 2003 when there was an acute need to address major flooding issues in the city of Kuala Lumpur. With the city densely built up to the brims, the...

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Germany

34th „Baugrundtagung“ Conference

The 34th Geotechnics Conference “Baugrundtagung” of the German society for geotechnics DGGT with accompanying specialist exhibition took place in September 2016 in Bielefeld. About 1200 participants...

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Issue 2016-07 Germany

34th „Baugrundtagung“ Conference

The 34th Geotechnics Conference “Baugrundtagung” of the German society for geotechnics DGGT with accompanying specialist exhibition took place in September 2016 in Bielefeld. About 1200 participants...

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