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Local scour at a bridge abutment along a curved channel
  • MERAL KORKMAZ,
  • M. EMİN EMİROGLU
MERAL KORKMAZ
Munzur Universitesi
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M. EMİN EMİROGLU
Firat Universitesi
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Abstract

Previous studies have generally focused on abutments located on a straight channel. Few have focused on curved channels. The present study comprised an experimental examination of the local scour that occurs around different length abutments placed on the inner and outer banks along a curved channel in a clear-water scour flow condition. The local scour around an abutment in a curved channel is a function of the upstream Froude number, flow intensity, the angle of bend curvature, and the ratios of abutment length to flow depth, abutment length to abutment width, and abutment length to channel width. The maximum scour depth around the abutments placed on the outer bank was found to be 1.45 times the scour depth on the inner bank. An empirical equation was developed to consider all dimensional parameters for equilibrium scour depth. The average percent error of the proposed equation was 2%.