Eliminace bezpečnostních rizik při ražení tunelu „Jablunkovský“

Abstract

The ever increasing demands on the capacity and safety required a reconstruction of one of the two Jablunkovsky tunnels, which were gradually built since 1870. This reconstruction is one part of the optimization section of the railway corridor "The optimization of the railway line from the SR state border through Mosty u Jablunkova village to Bystřice nad Olší village”, in which a new modern two-track railway tunnel was designed and was located on the same place of the already existing single-track Jablunkovsky tunnel 2. The tunnelling works were made under complicated technical and geological conditions. During the expansion of the whole tunnel profile there was a large tunnel collapsed that interrupted the works for more than a year. Therefore it is necessary to follow up the causes of the tunnel collapsed and identify, describe and assess the risks, to take measures to ensure their maximum elimination during the collapsed reconstruction and the completion of the tunnel.