THE STRENGTHENING AND REPAIR OF RAKEWOOD BRIDGE. PART 2. THE CONTRACTOR'S EXPERIENCE

This article describes the strengthening and repair of Rakewood bridge from the contractors viewpoint. The contract included many constraints dictating the timing and order of the works. Traffic management changes depended on the completion of work on the deck, within the steelwork and at the abutments. Demolition or construction works and structural steel strengthening had to be separated for safety reasons. Works were programmed using a critical path technique on a site-based microcomputer where progress information was regularly updated. Superstructure works required access to all of the bridge underside, but poor vehicle access into the valley below meant that a hanging platform had to be constructed using material supplied from the motorway hard shoulders. A temporary parapet railing and plywood screen bolted to the carriageway protected the breaking out of the parapets and associated 3 m wide strips of deck. Details are given of the reconstruction of deck slabs at the central reservation and the deck resurfacing. Strengthening of the beams required the bolting of 320 stressing anchorage brackets to the underside of the girder bottom flange plates; over 9 km of 50 mm, and 30 mm Macalloy bars were used. The original roller bearings at the intermediate pier crossheads were replaced with fixed pot bearings. Ballast walls at each abutment were also replaced. (TRRL)

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  • Corporate Authors:

    INSTITUTION OF HIGHWAYS & TRANSPORTATION

    6 ENDSLEIGH STREET
    LONDON,   United Kingdom  WC1H 0DZ
  • Authors:
    • Goldsby, I F
  • Publication Date: 1990-4

Language

  • English

Media Info

  • Pagination: p. 39-43
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00609675
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Files: ITRD, TRIS
  • Created Date: Jun 30 1991 12:00AM