THE NEW BONHOMME BRIDGE OVER THE BLAVET AT LORIENT. CONSTRUCTION

LE NOUVEAU PONT DU BONHOMME SUR LE BLAVET A LORIENT

THIS PRESTRESSED CONCRETE STRUCTURE IS COMPOSED OF A CONTINUOUS THREE-SPAN DECK, FIXED AT TWO SUPPORTS WHICH ARE HINGED AT THE BOTTOM, WITH AN OPENING OF 186 M BETWEEN HINGES. THE TOTAL LENGTH IS 282,6 M AND THE CENTRAL SPAN IS 146 M. THE PROP SUPPORTS HAVE RESULTED IN REDUCING THE NUMBER OF PIERS IN THE RIVER. THE DECK IS COMPOSED OF A BOX BEAM OF 9,95 M WIDTH AND 2,5 TO 7 M IN DEPTH WITH TWO VERTICAL WEBS OF 30 CM THICKNESS. THE SUPPORT LEGS INCLINED AT 45 DEG, ARE ARTICULATED AT THE BASE BY MEANS OF FREYSSINET HINGES WITH THIN GAPS. EACH HINGE IS COMPOSED OF THREE FREYSSINET FLAT JACKS AND FOUR REINFORCED CONCRETE WEDGES. FOLLOWING CONCRETING OF THE SUPPORTING LEGS AND THE BEGINNINGS OF THE DECK ON SCAFFOLDING, THE STRUCTURE WAS CONSTRUCTED BY THE CANTILEVER METHOD, THE CANTILEVER BEAMS RESTING ON TEMPORARY SUPPORTS FOUNDED IN THE BED OF THE RIVER.

Language

  • French

Media Info

  • Pagination: 284-90
  • Serial:
    • Construction
    • Issue Number: 10
    • Publisher: Reed Construction Data
    • ISSN: 0045-3900

Subject/Index Terms

Filing Info

  • Accession Number: 01296811
  • Record Type: Publication
  • Source Agency: Institut Francais des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)
  • Files: ITRD
  • Created Date: Nov 21 2010 6:05AM