Local Scour at Complex Piers

A methodology to predict local scour depth at a complex pier is presented that recognises the relative scouring potentials of the components of complex piers, and the transition of scouring processes occurring for varying pile-cap elevation. Scour depths are predicted over the entire range of possible pile-cap elevations using a combination of existing expressions for scouring respectively at uniform piers, caisson-founded piers, pile groups with debris rafts, and pile groups alone. The validity of the method is confirmed using measurements of local scour at complex piers, and a case study is used to highlight application of the methodology. For design purposes, the method highlights respective pile-cap elevations that maximise (i.e. to be avoided over the pier life) and minimise local scour at complex piers. The method reinforces that where the pile-cap elevation relative to the bed can vary with time at a bridge site, potential local-scour depths need to be assessed over the range of possible pile-cap elevations for the pier.

• Record URL:
  https://doi.org/10.1061/40856(200)176
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780784408568
• Supplemental Notes:
  • © 2006 American Society of Civil Engineers.
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Melville, Bruce
  • Coleman, Stephen
  • Priestley, Stephen
• Conference:
  • World Environmental and Water Resources Congress 2006
  • Location: Omaha Nebraska, United States
  • Date: 2006-5-21 to 2006-5-25
• Publication Date: 2006-5

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 9p
• Monograph Title: World Environmental and Water Resource Congress 2006: Examining the Confluence of Environmental and Water Concerns

Subject/Index Terms

• TRT Terms: Case studies; Dams; Depth; Piers (Supports); Pile caps; Scour
• Geographic Terms: Colorado; Wyoming
• Subject Areas: Design; Highways; Hydraulics and Hydrology; I24: Design of Bridges and Retaining Walls; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 01528490
• Record Type: Publication
• ISBN: 9780784408568
• Files: TRIS, ASCE
• Created Date: Nov 12 2013 1:17PM