Finding Fault at Hanekleiv

This article describes the investigation by the national public roads authority (NPRA) and the Department of Transportation (SD) of Norway into the Christmas 2006 collapse of a section of the Hanekleiv tunnel. The collapse, located to the southwest of Oslo, was located in the crown of the tunnel and thought to be due to smectite in the layers above the tunnel. The crown had been supported by rockbolts and steel fiber shotcrete, with damage running along the tunnel for 25 meters, albeit without great depth. The article describes a few other tunnel collapses in Norway that were similarly due to the weaknesses of smectite, as well as describing other precedents for the nearly vertical fault running through the tunnel. It was initially thought that expanding clay could have been the cause of the collapse, but that theory has been determined to not provide substantial enough evidence to allow for this type of collapse. The final section describes some errors in the tunnel's construction that could have contributed to the collapse.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/0041414X
• Authors:
  • Reynolds, Patrick
• Publication Date: 2007-3

Language

• English

Media Info

• Media Type: Print
• Features: Figures; Maps; Photos;
• Pagination: pp 14-16
• Serial:
  • Tunnels & Tunnelling International
  • Publisher: Progressive Media Markets, Ltd
  • ISSN: 0041-414X

Subject/Index Terms

• TRT Terms: Collapse; Tunnel lining; Tunnel supports; Vehicular tunnels
• Geographic Terms: Norway
• Subject Areas: Construction; Public Transportation;

Filing Info

• Accession Number: 01047141
• Record Type: Publication
• Source Agency: UC Berkeley Transportation Library
• Files: BTRIS, TRIS
• Created Date: Apr 30 2007 8:06AM