By lyndamyer
Being manufactured by Herrenknecht, the first Telt TBM S-1355 passed its FAT test on July 7th 2023. Excavation process of the 9km North tube from St Martin la PORTE to La Praz, parallel to the tube driven by Federica in 2019, is due to be up to this 10.415m TBM, while the digging process will be for 3 years with a progression of 10 m/gg and the 264t cutting wheel is slated to be equipped with 62 x 19″ cutters plus 3 extra cutting discs for a 10.615 m excavation diameter.
With 500 m combined progress per month, the Turin-Lyon currently has 10 work sites open in Italy and France. To date 33 km of the 165 km total of tunnels to be driven for the project have already been built. The determined time for next FATs for two more of the Herrenknecht TBMs S-1356 and S-1357 is October and November 2023, whereas these TBMs are going to be involved in the excavation of the two tubes from La Praz to Avrieux.
