The purpose of the monitoring is to acquire the knowledge of the natural context to guide the design choices towards less impactful solutions.

The article describe the compensation program implemented in the approach to environmental compensation in the two countries.

After excavating close to 300 metres, the TBM encountered a significant geological accident which required adaptation work to be carried out.

The exploratory works already carried out have shown the presence of sulphates within the excavated material.

TELT possesses a collection of original documents concerning the original Fréjus Rail Tunnel.

France and Italy established the “Common Operating Rules” for protecting the health and safety of workers.

The paper begins with a description of the procedures followed for the Channel and Brenner links, which are similar to the future Montcenis base tunnel.

Opportunities include a reduction in the use of soil and an increase of the excavation with mechanized means.