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1995年1月18日正式开工的位于西安至安康铁路干线上的秦岭隧道。是由二条相互平行的准轨铁路单线隧道所组成,其中Ⅰ线隧道长18.448公里,采用直径为8.8米的全断面掘进机开挖,计划在5年内建成。Ⅱ线隧道长18.457公里,采用钻爆法施工,先采用平行导坑贯通,待Ⅰ线隧道建成再将平行导坑扩大而成,预计工期约10年。 这座隧道建成后,不但是我国最长的铁路隧道,在世界特长隧道中,也将位居前列,而且在亚洲各国铁路上,其长度将开创以下20项记录。 一、就其全长而言,将是亚洲最长的: 1、铁路单线隧道。 2、铁路单线山岭隧道。 3、准轨铁路单线隧道。
January 18, 1995 officially started in Xi’an to Ankang Railway on the Qinling Tunnel. It is made up of two parallel single-track railways with a standard length of 18.448 km. It is planned to be completed within 5 years using a full-face tunnel boring machine with a diameter of 8.8 m. The second-line tunnel is 18.457 kilometers long. It is constructed by drilling and blasting method. First, the parallel pilot tunnel is adopted. When the first tunnel is completed and then the parallel pilot tunnel is enlarged, it is estimated that the construction period will be about 10 years. After the completion of this tunnel, not only is China’s longest railway tunnel, it will also be among the top tunnels in the world, and the length of the railway in Asian countries will create the following 20 records. First, in terms of its full length, it will be the longest in Asia: 1, a single-lane railway tunnel. 2, single track mountain railway tunnel. 3, the single-track railroad rail.