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Abstract: In the context of the Greater Paris Project, aimed to empower the actual Parisian Metro Network, SYSTRA is in charge of the design of the southeastern section of Line 15. This stretch consists of a 21km long bored tunnel, 8 underground stations and 25 safety and ventilation shafts, located in a densely urbanized area. One-track and double-track tunnels up to 8.70m of inner diameter have been...