Preliminary Procedure to Predict Scour in Bedrock

Details

• Creators:
  Smith, Steven P.
• Corporate Creators:
  Colorado. Department of Transportation
• Corporate Contributors:
  United States. Department of Transportation. Federal Highway Administration
• Subject/TRT Terms:
  • Bridges
  • Scour
  • Bedrock
  • Depth
  • Estimating
  • Forecasting
  • Future
  • Power
  • Research
  • Streams
  More +
• Publication/ Report Number:
  CDOT-R-SD-94-14
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States ; Colorado
• Edition:
  Interim Report: 12/93 to 09/94
• Corporate Publisher:
  Colorado. Department of Transportation
• Description:
  The primary goal of this study is to develop a procedure to predict scour depths in bedrock that accounts for both the hydraulic conditions at the bridge site and the bedrock's ability to resist erosion. A methodology for determining material erodibility resulting from the erosive power of water has been presented by Annandale (1993, 1995). He introduced a relationship between stream power and a geomechanical material classification system known as the erodibility index. This report applies his findings to bridge scour analysis and presents an interim procedure for estimating bridge scour depths in bedrock and other materials defined by the erodibility index. The recommendations in this report are currently being applied as an interim method for evaluating bridge scour at the Colorado Department of Transportation. Further laboratory study is planned to refine the relationship between energy dissipation at bridge piers and pier geometry. Findings from this study will be made available in a subsequent report.
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/93740/dot_93740_DS1.pdf
• File Type:
  [PDF - 4.18 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha-512:83da7d607100319d1eb56628b166f67adb10a21a7bf1b85705e33271ab4deef593cdc565c9a712b6178c45cafd61eb2fab8d610ec80bc0c686ce337d61016303