Realization of natural tunnel excavation in progress with traditional geology compact clay mixed Flisch sand, digging square meters footprint. About 135, total length ml. 385.70, consolidation in the cap, on the whole lungnezza with n. 64 micropiles (cemented with cement mixtures) steel Ø 130 to 16.00 ml and fields of excavation ml.12,00. Consolidation to cope with VTR ml. 14,00 cemented with cement mixtures 1/1.