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Strategies for Managing Unknown Bridge Foundations

File Language:
English


Details

  • Creators:
    Elias, Victor
  • Corporate Creators:
  • Contributors:
  • Corporate Contributors:
    United States. Federal Highway Administration
  • Subject/TRT Terms:
  • Publication/ Report Number:
    FHWA-RD-92-030
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    United States
  • Contracting Officer:
    Roy E. Trent
  • Corporate Publisher:
    United States. Federal Highway Administration
  • Abstract:
    State highway agencies have plans and records on the type and depth of foundations for most federal-aid highway system bridges, though, not nearly as much data exists for off-system bridges. Information on type and depth of the foundations, however, is essential for conducting scour evaluations in order to respond to criteria for the National Bridge Inspection Standards (NBIS). This report summarizes the problem of unknown foundations and provides a strategy for managing the problem of unknown foundations. This report characterizes the nation's bridges over water with respect to key parameters such as average daily traffic (ADT), length, functional classification data, scour related parameters, and other data contained in the National Bridge Inventory (NBI). The subset of bridges with unknown foundation conditions is characterized and quantified in order to determine their impact on scour evaluations presently in progress. A risk based procedure has been developed to allow the bridge owner to manage bridges with unknown foundations. A model is provided to assess the need to determine the type and depth of foundation. The model allows the owner to prioritize bridges having the greatest urgency or economic benefit for determining attributes about the foundation type and depth. Finally a methods guide outlining measures that might be taken to determine foundation type and depth is presented.
  • Format:
    PDF
  • Funding:
    DTFH61-90-00047
  • Collection(s):
  • Main Document Checksum:
    urn:sha-512:42f8f7a2fe8ba545db5e83ed5210a7d4251c4bbba8bc19310d9e94421b8a0700af8469352052047f8b6230bb60c8f23c53e18b7b9461b33b7943de32859ecf0f
  • Download URL:
  • File Type:
    Filetype[PDF - 5.47 MB ]
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