Motorway I/11 Čadca – town bypass, part Bukov – Horelica
Client: Slovenská správa ciest, Investorský útvar Žilina
Structures description and completed works:
Exploration gallery – escape corridor for site Motorway I/11
Čadca – town bypass, part Bukov – Horelica
SO 206-12 Exploration gallery – escape corridor
Exploration gallery – escape corridor with main cross-section profile of 13 sqm, extended cross-section profile at fans areas 15,5 sqm of excavation, 2 connectors are 7,2 sqm excavated profile. Gallery is designed in a profile of second tunnel tube (it follows its direction and slope). Only in the initial part it is led in a way that it shall violate original excavation pit support of Čadca portal as minimally as possible. Il is led parallel with original tunnel tube. Access portal is provided with safety collars. Transitional cross-section of gallery is of 2,5 m height, total width represents 3.2 m. Connection of operation tunnel and escape corridor through 2 tunnel connectors with transitional height of 1,8 and total width of 2 m.
Exploration gallery – escape corridor Horelica Tunnel works were executed in two stages. First stage included gallery portal supporting by micropile umbrella; gallery was excavated and supported by reinforcing elements in its whole length and two connectors for constructing tunnel. Second stage works were executed from the end of gallery to mouth, works included drainage bores and secondary layer coating of shotcrete. This stage also included concreting of portal collar of the escape corridor.
Contract sum: 89,7 mil. SKK
Construction period: September 2003 – May 2004