Guide to Remedial Measures for Liquefaction Mitigation at Existing Highway Bridge Sites

The seismic evaluation of an existing highway bridge requires the assessment of the liquefaction potential of supporting soils and resulting damage to the structure and its foundations. Where the risk of damage due to excessive deformations associated with the development of liquefaction is judged to be unacceptable, ground or foundation improvement can potentially be used to reduce the level of damage to acceptable levels. This report presents considerations for (1) evaluating the potential for liquefaction-induced damage to an existing highway bridge and the need for remediation, (2) selecting and designing remedial measures, and (3) implementing the proposed improvement schemes in the field. Flow charts are included for assessing whether liquefaction remediation is necessary at an existing bridge with shallow or deep foundations based on evaluations of liquefaction potential, stability, and deformations of the ground and foundations. For a bridge where liquefaction remediation is judged necessary, a procedure is outlined for selection and design of remedial measure schemes. The applicability of various ground and foundation improvement methods at different abutment and pier types is presented. Factors that influence the design and performance of improved ground schemes are discussed, including treatment zone size and location. Guidelines are provided for the construction and verification of improvement measures including specifications, field tests, and quality assurance and control.

  • Record URL:
  • Corporate Authors:

    Virginia Polytechnic Institute and State University, Blacksburg

    Department of Civil and Environmental Engineering
    Blacksburg, VA  United States  24061

    Multidisciplinary Center for Earthquake Engineering Research

    State University of New York, 107 Red Jacket Quadrangle, P.O. Box 610025
    Buffalo, NY  United States  14261-0025

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Cooke, Harry G
    • Mitchell, James K
  • Publication Date: 1999-7-26

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Technical Report
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 198p

Subject/Index Terms

Filing Info

  • Accession Number: 01714052
  • Record Type: Publication
  • Report/Paper Numbers: MCEER-99-0015
  • Contract Numbers: DTFH61-92-C-00106
  • Files: NTL, TRIS, ATRI, USDOT
  • Created Date: Aug 1 2019 10:20AM