INFLOW SEEPAGE INFLUENCE ON PIER SCOUR

A flume study was conducted to investigate the influence of inflow seepage on localized pier scour through an alluvial channel bed. Eight tests were performed in which seepage inflow ranged from zero to three times the liquefaction velocity of the bed material. Channel Froude numbers ranged from approximately 0.40 to 0.80. The results indicated that for channel Froude numbers less than 0.70 and seepage velocity less than critical, the scour hole degraded by 20%. For channel Froude numbers less than 0.70 and seepage velocity greater than critical, the scour hole aggraded while the scour hole width increased as much as 2.25 times wider than scour hole widths observed for the no-inflow conditions. When the channel Froude number exceeded 0.70, scour hole depths were similar to the no-inflow conditions while the bed elevations adjacent to the scour hole significantly degraded.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/trr/1988/1201/1201-008.pdf
• Record URL:
  https://scholar.google.com/scholar_lookup?title=INFLOW+SEEPAGE+INFLUENCE+ON+PIER+SCOUR&author=S.+Abt&author=J.+Richardson&author=R.+Wittlers&publication_year=1988
• Availability:
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• Supplemental Notes:
  • This paper appears in Transportation Research Record No. 1201, Arid Lands: Hydrology, Scour, and Water Quality. 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:
  • Abt, Steven R
  • Richardson, Jerry R
  • Wittlers, Rodney J
• Publication Date: 1988

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 54-61
• Monograph Title: Arid lands: hydrology, scour and water quality
• Serial:
  • Transportation Research Record
  • Issue Number: 1201
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Bridge piers; Channels (Waterways); Flumes; Froude number; Scour; Seepage
• Uncontrolled Terms: Inflow
• Old TRIS Terms: Test results
• Subject Areas: Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00489706
• Record Type: Publication
• ISBN: 0309047625
• Files: TRIS, TRB, ATRI
• Created Date: Nov 30 1989 12:00AM