EFFECTS OF RECTANGULAR FOUNDATION GEOMETRY ON LOCAL PIER SCOUR

The authors present a method for predicting the effect of rectangular foundation geometry on local scour at bridge piers using existing scour equations and considering the mechanisms of local scour. Normalized scour depths estimated by the procedure are compared to normalized scour data gathered by others and data collected by the authors in a laboratory study. The data and the method reveal the effect of the rectangular foundations through the entire range of possible pier to foundation width ratios and through the entire range of foundation elevations. The effect of an upstream foundation extension is investigated as well. The study reveals that considerable reduction in the scour depth may be observed if the foundation is located at or below the streambed. The method can be used to assess the potential for scour around existing piers. Problems associated with relying on foundations to reduce scour depths are presented. Recommendations for the use of this method are provided and future research is suggested.

Language

  • English

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Filing Info

  • Accession Number: 00715389
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Jan 24 1996 12:00AM