Work: SIGHISOARA TUNNEL (ROMANIA) Client: JV FCC-Azvi-Alpine-Straco

As Danes tunnel, is one tunnel of new pan-European railway line, connecting several Central European regions with Turkey. The work is set in the stretch Atel-Micasasa.

Unlike the previous, this tunnel is of higher complexity because it is an urban tunnel with some areas of lower coating, sometimes behind a meter. The tunnel has a length of 401 meters and a variable excavation section between 134,05 sqm and 153.67 sqm. The excavation material, as in Danes, consists of very cohesive and compact clays and silts. The tunnel is separated into 325 meters of mining excavation section and two artificial tunnel segments totaling 76 meters.

Construction method chosen is drilling and blasting by mechanical means, excavating by pre-tunnelling and bench excavation, whit the projection of gunite in several layers as support. HEB-160 trusses are placed each meter of tunnel excavation.

CIVILSUB teams are carrying out the excavation and the tunnel support.