Practical Approach to Estimating Realistic Depths of Abutment Scour

Observations of bridge abutment scour lead to a practical new approach for estimating realistic scour IIHR-Hydroscience and Engineering depths at bridge abutments. Prior design approaches usually led to unrealistically deep estimates of abutment scour depth. The observations presented stem from flume experiments conducted with abutments with approach embankments subject to a range of erodibility conditions: fixed embankment on fixed floodplain; riprap-protected erodible embankment on readily erodible floodplain, and unprotected readily erodible embankment on readily erodible floodplain. The approach discards the old notion of linearly combining bridge-waterway constriction scour and local scour at the abutment structure, a notion that laboratory experiments do not support. Instead, the approach entails estimating an abutment-induced local amplification of constriction scour at the bridge opening, and separately estimating a maximum local scour depth at the abutment when exposed by embankment failure.

• Record URL:
  http://www.ctre.iastate.edu/pubs/midcon2005/index.htm
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780965231084
• Corporate Authors:

  Iowa State University, Ames

  Center for Transportation Research and Education
  2711 South Loop Drive, Suite 4700
  Ames, IA  United States  50010-8664
• Authors:
  • Ettema, Robert
  • Yorozuya, Atsuhiro
  • Nakato, Tatsuaki
  • Muste, Marian
• Conference:
  • The 2005 Mid-Continent Transportation Research Symposium
  • Location: Ames Iowa, United States
  • Date: 2005-8-18 to 2005-8-19
• Publication Date: 2005

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References;
• Pagination: 12p
• Monograph Title: Proceedings of the 2005 Mid-Continent Transportation Research Symposium

Subject/Index Terms

• TRT Terms: Abutments; Bridge abutments; Embankments; Erosion; Estimating; Flood plains; Flumes; Laboratory tests; Riprap; Scour; Slope failure; Waterways
• Subject Areas: Bridges and other structures; Design; Highways; Marine Transportation; I24: Design of Bridges and Retaining Walls;

Filing Info

• Accession Number: 01004244
• Record Type: Publication
• ISBN: 9780965231084
• Files: TRIS
• Created Date: Sep 30 2005 8:12AM