200 kilometers of track on four new, fully automated subway lines with 68 stations and seven technical centers – the Grand Paris Express is currently the largest infrastructure project in Europe. The metropolitan area of the French capital is getting an additional network of routes designed with sustainability in mind, whose main task is connecting the municipalities surrounding the city with each other more efficiently.
Approximately 2 million passengers per day are expected to use the four new lines 15, 16, 17 and 18 as well as the extensions of line 14. The "Société du Grand Paris", a superordinate planning body, also expects massive savings in CO2 emissions as well as a major impetus overall for the development of economic strength and the quality of life in the region with around 12 million inhabitants. All planned new lines and extensions of existing lines are to be operational by 2030.
90 per cent of the new lines being built will run underground. By July 2018 the companies contracted by Société du Grand Paris to carry out the construction had ordered 20 tunnelling machines from Herrenknecht. The 17 EPB shields and three multi-mode TBMs (Variable Density TBMs) with diameters between 7.7 meters and 9.8 meters designed specifially for the project are scheduled to bore a total around 70 kilometers of tunnel and line them with concrete segments.
Herrenknecht also supplied a Vertical Shaft Sinking Machine (VSM) to build four ventilation and rescue shafts for Line 15. Mechanized shaft sinking was given preference as the Herrenknecht VSM is superior here to conventional methods both in terms of space constraints as well as environmental requirements. The shafts with diameters between 8.3 and 11.9 meters are being sunk down to depths of up to 53 meters.
Extensive deliveries by companies from the Herrenknecht Group contribute to efficient jobsite logistics and smooth tunnelling in Paris: Techni-Métal Sytèmes multi-service vehicles, H+E conveyor systems, VMT navigation and monitoring systems, Herrenknecht Formwork segment moulds as well as tunnelling specialists from Global Tunnelling Experts.
All of the Group's service competencies are concentrated in a service hub specially set up by Herrenknecht in the French capital.