Comparison of observed and predicted abutment scour at selected bridges in Maine.

Details

• Creators:
  Lombard, Pamela J. ; Hodgkins, Glenn A.
• Corporate Creators:
  Geological Survey (U.S.)
• Subject/TRT Terms:
  • Bridge abutments
  • Scour
  • Mathematical prediction
  • Correlation analysis
  • Field studies
• Publication/ Report Number:
  42951
• Resource Type:
  Tech Report
• Geographical Coverage:
  Maine
• Corporate Publisher:
  Maine. Dept. of Transportation
• Abstract:
  Maximum abutment-scour depths predicted with five different methods were compared to ; maximum abutment-scour depths observed at 100 abutments at 50 bridge sites in Maine with a ; median bridge age of 66 years. Prediction methods included the Froehlich/Hire method, the ; Sturm method, and the Maryland method published in Federal Highway Administration ; Hydraulic Engineering Circular 18 (HEC-18); the Melville method; and envelope curves. No ; correlation was found between scour calculated using any of the prediction methods and ; observed scour. Abutment scour observed in the field ranged from 0 to 6.8 feet, with an average ; observed scour of less than 1.0 foot. Fifteen of the 50 bridge sites had no observable scour. ; Equations frequently overpredicted scour by an order of magnitude and in some cases by two ; orders of magnitude. The equations also underpredicted scour 4 to 14 percent of the time.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27111/dot_27111_DS1.pdf
• File Type:
  [PDF - 1.22 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:ec696fe5c516230c15b412b257e0bd87767495b26cbafea690116240e93fac0c