ALPINE BRIDGE SCOUR FOLLOWS CHECKS LAPSE

Severe damage to a bridge on Europe's busiest trans-Alpine motorway has been blamed on aggressive river scour which had developed unnoticed. A period of heavy rain added to snow melt led to an extremely fierce flow. The huge river pier sank and rotated several metres causing the deck to tilt, pull apart the motorway carriageways and cause extensive cracking in adjacent piers. The original design of the river bed foundation, built in 1968, was said to be too shallow and of a type not likely to be built today. Brief details are given of repairs carried out to the bridge which continued to move for several days. Serious disruptions have been caused to traffic on the motorway and trunk road carried by the bridge and to the railway line and river underneath. The rail route to Italy will be reopened once temporary support works are completed but the motorway is expected to be closed for at least a year while repairs or rebuilding are carried out. A British AA spokesman said that this showed the vulnerability of motorway networks and the need for consideration to be given to alternative routes. (TRRL)

  • Availability:
  • Corporate Authors:

    Thomas Telford Limited

    London,   United Kingdom 
  • Authors:
    • WATSON, R
  • Publication Date: 1990-7-19

Language

  • English

Media Info

  • Pagination: p. 7-8
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00617367
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Nov 30 1991 12:00AM