Тунел "Козница" - най-дългият ЖП тунел в България

Drone video from Koznitsa railway tunnel at Koprivshtitsa station and Stryama station Koznitsa Tunnel is the longest railway tunnel in Bulgaria, with a length of 5808.60 m - located on the line Sofia - Bourgas between the stations Koprivshtitsa and Stryama (Karlovo municipality). The tunnel passes under the Koznitsa ridge, connecting Stara Planina and Sashtinska Sredna Gora, and it usually takes about 10 minutes to travel by train. There is only 1 track. The construction of the tunnel began in 1949. It was finally completed on June 6, 1951. It was dug by the Labor Army under the leadership of Captain Atanas Panayotov, and the site manager was Eng. Kolarov, son of Vasil Kolarov. From March 1st to September 8th 2020, the tunnel was closed for modernization. The contractor of the site is the association "Infrastructure Construction-Geostroy". The term for carrying out the construction activities was 180 days, and the contract for BGN 24 million. The construction contract was for the removal of the depreciated railway line and catenary. Tunneling morbidity includes: scraping the existing ballast prism and building a new one construction of a double drainage system - ditches and drainages. laying of a thick concrete slab, on which a new non-adjusting railway with rails type UIC 60 will be placed - for higher load-bearing capacity. installation of tunnel lighting. After the completion of the repairs, the speed in the railway section between Koprivshtitsa and Stryama, part of the third main railway line Sofia - Burgas, will increase to a design speed of 85 km / h. Video: "Koznitsa railway tunel - longest tunel in Bulgaria" Video Format: 4k Date: 05.09.2020 Music: My Train's A Comin' - Unicorn Heads Redistribution is NOT allowed. Any reproductions or distributions of content elsewhere is violation of the licence under which this video is available on YouTube platform