APPLICATION INNOVANTE AU CHANTIER LTF DE LA DESCENDERIE DE MODANE
This paper describes the innovating blasting technique introduced during excavation of the access tunnel at the future Lyon Turin Ferroviaire (LTF) project in Modane.
A total of 80 typical conventional drill and blast rounds were employed for the excavation of the first 233 meters. The presence of the village Villarodin-Le Bourget, located approximately
70 meters above the project, induced severe environment constraints such as noise and vibrations. At this particular location excavation became hardly acceptable by surrounding residents. Under L.T.F.'s agreement, YSO Consultants proposed its Blast Engineering Plan based on his practices in the field of controlled blast-induced damages; some of these developments have been introduced in the domain of underground excavations particularly during experiments at underground laboratories 1 conducted on behalf of the French Agency for Nuclear Waste Repository (ANDRA). This engineering proposed to LTF, notably differs from the conventional rounds design of underground excavations. Excavation could be able to progress and pass the village.
