Negli scorsi giorni la fresatrice "Delia" ha completato i lavori di scavo del cunicolo di accesso alla zona geologicamente disturbata a Sud del massiccio del San Gottardo, necessari per la realizzazione del secondo tubo della galleria.
Nel cunicolo
RSI 07.08.2023, 14:45
I lavori, iniziati quasi un anno fa e più precisamente il 23 agosto scorso, erano necessari per superare la cosiddetta zona "Guspis", situata nel cuore della montagna dove le caratteristiche della roccia impongono l’avanzamento con esplosivi.
"Delia" ha scavato un cunicolo di 4'912 metri, con una media di avanzamento di 14,7 metri al giorno. Sono stati estratti circa 211'000 metri cubi di roccia, per una totale di 530'000 tonnellate di materiale. In un comunicato odierno (lunedì) dell’Ufficio federale delle strade USTRA viene sottolineato che non sono stati registrati incidenti di rilievo e che sono state impiegate circa 50 maestranze.
Alla scoperta della seconda galleria del San Gottardo
Il Quotidiano 17.06.2023, 19:00
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