EVALUATION OF PREDICTIONS AND METHODS FOR HIGHWAY BRIDGE SCOUR. FINAL REPORT

The purpose of this study was to use bridge pier scour data collected by various Florida Department of Transportation (FDOT) District Offices to test the applicability of the scour prediction equations in HEC-18 in the coastal environment. A substantial amount of pier scour data exists in bridge inspection reports throughout the districts. Unfortunately little or no information on the environmental conditions that caused the scour exists. A definitive evaluation of the equations therefore was not possible. With U.S. Geological Survey stage data, estimates of the flow at the time of scour for a bridge over the St. Johns River were made allowing some qualitative conclusions to be drawn. An overview of coastal processes as they relate to bridge scour in the coastal zone is presented. The migration of an unimproved inlet on the northeast coast of Florida (Fort George Inlet) is discussed in detail to illustrate aggradation and degradation scour in the coastal zone. The study points out the need for a well thought out and universally applied scour measurement plan that includes the measurement of environmental parameters (currents, sediment type and size distribution, etc.) as well as scour measurements. The scour measurements should be sufficient to distinguish between the various types of scour (i.e., local, contraction or aggradation and degradation).

• Corporate Authors:

  University of Florida, Gainesville

  Coastal and Oceanographic Engineering Department, 336 Weil Hall
  Gainesville, FL  United States  32611-6590

  Florida Department of Transportation

  Haydon Burns Building, 605 Suwanee Street
  Tallahassee, FL  United States  32301

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Sheppard, D M
  • Reddy, D V
  • Niedoroda, A W
• Publication Date: 1992-2

Language

• English

Media Info

• Features: Appendices; Figures; Photos; References; Tables;
• Pagination: 111 p.

Subject/Index Terms

• TRT Terms: Coasts; Equations; Forecasting; Highway bridges; Scour
• Uncontrolled Terms: Coastal regions
• Geographic Terms: Florida
• Subject Areas: Highways; Hydraulics and Hydrology; I26: Water Run-off - Freeze-thaw;

Filing Info

• Accession Number: 00628943
• Record Type: Publication
• Report/Paper Numbers: UF Proj No. 49104511224, HPR Study No. 578, WPI No. 0510578
• Contract Numbers: C-3530
• Files: TRIS, USDOT, STATEDOT
• Created Date: Apr 29 1993 12:00AM