JACKING STEEL BRIDGE SUPERSTRUCTURES IN WASHINGTON STATE

Lifting steel bridge superstructures in Washington State is described. The use of jacks is an effective means for raising existing plate girder bridges to increase vertical clearance, to remove and replace defective bridge bearings, and to transfer the superstructure dead load from one existing bridge substructure to another. Case studies are presented for two successful jacking operations that involved connecting permanent steel jacking beams to the girders and jacking upward from the substructure. Generally, data on jacking operations do not appear in the technical literature. In one case study presented, data were recorded from jack gauges, and a comparison between calculated and recorded lifting loads is presented that indicates the transverse distribution of loads to the jacks. The total lifting loads recorded exceeded the calculated loads by 22 to 32%. Possible reasons for these discrepancies and recommendations for lifting bridge superstructures are given. It is recommended that jacks be sized for at least 1 1/2 times the calculated lifting loads.

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1991/1319/1319-011.pdf
• Record URL:
  • https://scholar.google.com/scholar_lookup?title=JACKING+STEEL+BRIDGE+SUPERSTRUCTURES+IN+WASHINGTON+STATE&author=J.+Van+Lund&publication_year=1991
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309051576
• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1319, Bridge and Hydrology Research 1991. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Van Lund, John A
• Publication Date: 1991

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 94-101
• Monograph Title: Bridge and hydrology research 1991
• Serial:
  • Transportation Research Record
  • Issue Number: 1319
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Bridge superstructures; Bridges; Case studies; Jacks (Mechanical equipment); Maintenance; Recommendations
• Uncontrolled Terms: Bridge maintenance; Jacking
• Subject Areas: Bridges and other structures; Highways; Maintenance and Preservation; Research; I61: Equipment and Maintenance Methods;

Filing Info

• Accession Number: 00621493
• Record Type: Publication
• ISBN: 0309051576
• Files: TRIS, TRB
• Created Date: Apr 30 1992 12:00AM