The terminal supports all the facilities required by the tunnel user,
and those necessary for the management, the maintenance and safety of
the transport dimensions and functions, it is comparable to a major in
ternational airport. After having defined the functions of the infrast
ructure, this Paper looks into the studies that preceded its completio
n. It also discusses the works carried out on a soil with limited bear
ing capacity. A section is devoted to the civil engineering structures
and the installation of the railways.