Construction of the 7 km James River bridge in Virginia is being undertaken in stages. Crossover trestles are being used to maintain continuous traffic over the lift span and its trussed approaches which will be replaced in the second phase. Pre-cast concrete trestle approach spans are to a standard pattern which will allow interchange of components with a nearby bridge-tunnel should damage occur. Designed for AASHTO HS-20 loading, the 22.9 M of I beam spans are carried by 1.4 M cylindrical prestressed concrete piles which even in shallow water proved cheaper than 0.6 M square prestressed concrete alternatives. All bridge components were pre-cast 56 km away and carried by barge to the site. Each span involved a three-pile bent, pile cap and 245 T prestressed pre-cast deck module. The deck monolith was hoisted or floated into position. Erection of the lifting span superstructure is to be started shortly following the completion of the piers from a floating concrete batching plant. /TRRL/

Media Info

  • Features: Photos;
  • Pagination: p. 18-20
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00195540
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Aug 15 1979 12:00AM