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Javorova Kosa Tunnel
Javorova Kosa Tunnel ((クロアチア語:Tunel Javorova Kosa)) is one of the most significant structures on the Croatian A6 motorway route. It is long and consists of two tunnel tubes. It is located between Vrbovsko and Ravna Gora interchanges. The tunnel is tolled within the A6 motorway closed toll collection system. There are no other toll plazas related to use of the tunnel.
==Construction==
Javorova Kosa Tunnel was designed by Inženjersko projektni zavod and its construction was started by Spie Batignolles and Mediteran Union Tunel. The construction works contract was cancelled in 2001, with of the tunnel left to excavate. The works were resumed by Konstruktor and STRABAG AG in 2002 after a new contract was awarded to them. Konstruktor completed the construction by June 2003. The tunnel was excavated using the New Austrian Tunneling method.
Construction of the tunnel was hindered by low air temperatures, dropping to . This was especially problematic as the concrete plant used for the works was away. Later, during execution of the secondary tunnel tube lining, the tunnel caved in due to a hydraulic failure of surrounding soil, caused by considerable inflow of meltwater. The failure affected a section of the tunnel, and of rock and soil had to be removed to remedy the situation. The incident, however, caused no delay of completion schedule.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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