At the end of June, the Eiffage/NGE JV responsible for the construction of the Toulouse Metro Line C, Lots 1 and 2 unveiled Herrenknecht TBM ‘Jeanne Marvig’ at the Colomiers Gare shaft site.
Jeanne Marvig – one of the TBMs that will excavate the 8.5m diameter i.d., 12.7km of Lots 1 and 2 – will begin operations between Colomiers Gare, the line’s terminus, and the Laporte shaft on Lot 1 in the coming months.
The unveiling ceremony was organized by client, Tisséo Ingénierie. Construction teams are now hard at work assembling the machine ready for launch.
In early 2023 Tisséo awarded the Eiffage /NGE a €233m contract for civil works on the Lot 1, 3.9km Colomiers – Laporte tunnelled section of the Toulouse Metro Line C project which includes three stations, and four inter-station ancillary structures, followed by the award of the €590m Lot 2 contract which covers the 8·4km between Laporte and Raynal.
Both Lots will employ various advanced techniques, such as a next-generation TBMs and fibre-reinforced concrete segments using less steel in 95% of the project. These concrete segments will be manufactured by the consortium at a new plant in the Toulouse region. Carasol®, a soil analysis technique developed by Eiffage, will also be utilised.
As part of its environmental commitments, the consortium aims to recover over 80% of the excavated material. It has also pledged to reduce the project’s carbon footprint through the use of primarily renewable energy, clean vehicles, and eco-designed, low-consumption installations.
The 27km long, 21 station infrastructure project is scheduled for handover in summer 2027 prior to development and equipment installation works followed by commissioning in 2028.
Herrenknecht
Pioneering Underground Technologies - Herrenknecht AG is the technology and market leader in mechanized tunnelling. As the only company worldwide, Herrenknecht delivers cutting-edge tunnel boring machines for all ground conditions and in all diameters - ranging from 0.10 to 19 meters.
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