This text is intended primarily for the various participants in the construction process (owners, designers, consulting engineers and contractors) working on underground structures built using mechanical excavation by tunnel boring machines. It does not constitute a regulation and should not be construed or used as such but its purpose is to draw attention of readers on the specifities of steel fibre-reinforced concrete (SFRC) for the design, dimensioning and construction of lining rings made of precast arch segments. This version is based on the AFTES recommendation currently in force for the reinforced concrete precast segments and on the “fib” Model Code 2010 for the specificities of the fibre-reinforced concrete. Due to a growing feedback, no dimensioning example is proposed in this recommendation; this supplement may be provided in a later edition.
