In January 2001, French and Italian governments signed an agreement for the construction of a new Lyon-Turin railway line. This project includes a tunnel of 53.1 km length and a maximum of 2500 m overburden to be designed for a reference speed of 220 km/h. The tunnel crosses major part of the West Alpine geological formations, which are very complex and contrasted in terms of the nature of rocks and the mechanical and hydrogeological conditions. In addition to the twin single-track tubes, numerous intermediary shafts, security station and intervention sites and cross passages should be built to respond to the security, operational and construction requirements. This paper describes the results of the preliminary engineering design and multiple challenges of this very long and deep railway tunnel.
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机译：2001年1月，法国和意大利政府签署了建设新的里森铁路线的协议。该项目包括53.1公里长的隧道，最多2500米过度覆盖物，专为220 km / h的参考速度而设计。隧道穿过西山地质形成的主要部分，这在岩石和机械和水文地质条件的性质方面非常复杂，对比。除了双轨道，众多中间轴，安全站和干预网站以及跨通道应建造，以响应安全，运行和施工要求。本文介绍了初步工程设计的结果和这一非常长而深入的铁路隧道的多种挑战。
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