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Evaluation of Bridge-Scour Research: Abutment and Contraction Scour Processes and Prediction (2011) / Chapter Skim
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3 ABUTMENT SCOUR AS A DESIGN CONCERN
Pages 25-27

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From page 25...
... The integrity of the abutment column also may be affected by embankment failure, but this may not be the worst case for the column, as discussed below. Embankment failure acts to relieve flow contraction, diminish macro-turbulence generation, and consequently reduce the maximum scour depth attained.
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From page 26...
... Embankment failure may limit the development of abutment scour to a potential maximum depth, because the exposed embankment soil erodes laterally, increasing the flow area and easing flow velocities in the area of deepest scour. The essential question leads to the following more specific questions: 1.
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From page 27...
... Another example of embankment failure is shown in Figure 3-2 for a flood in the Atlanta metro area in 2009. Flow coming from the left floodplain as well as overtopping of the bridge severely eroded the left embankment, exposed the abutment and resulted in the approach span to the bridge deck falling into the stream.
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Key Terms

  • embankment failure
  • abutment scour
  • scour depths
  • abutment column
  • deepest scour

  • maximum scour
  • embankment stability
  • abutment design
  • exposed abutment
  • bridge pier

  • design question
  • depth associated
  • essential design
  • depth attainable
  • depth pose

  • left embankment
  • scour leading
  • bridge abutments
  • easing flow
  • scour failure

  • designing bridge
  • abutment essentially
  • earthfill embankment
  • following embankment
  • potential maximum

  • embankment near
  • bridge deck
  • depth attained
  • failure typically
  • design scour


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