Sweden's Longest Rail Tunnels

This article describes the progress on the two longest tunnels being built in Sweden as part of a massive rail project in the country’s mid-north section. Unanticipated variations in the rock formations have slowed tunneling in some parts as tunneling machines encounter less stable rock than the typical hard and ancient Baltic shield. The newer rock is also tilted and sheared and fractured, creating pockets of sediments that vary widely in size. The rigs used are listed, along with the typical advance length and spoil removal. Grouting has been difficult, with many more boreholes required than anticipated because of high water inflows in fracture zones. The gravel trackbed remains to be completed, along with some other finishing work. Track laying is expected to begin in August of 2007 on one section. Trains are expected to be running on the new section by 2010.


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Filing Info

  • Accession Number: 01044978
  • Record Type: Publication
  • Source Agency: UC Berkeley Transportation Library
  • Files: BTRIS, TRIS
  • Created Date: Mar 22 2007 1:48PM