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Pier and Contraction Scour in Cohesive Soils (2004) / Chapter Skim
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Pages 111-113

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From page 111...
... This earlier method was developed by the authors under TxDOT sponsorship and was verified by satisfactory comparison between predicted scour and measured scour at eight bridges in Texas. 13.1.5 SRICOS-EFA Method for Maximum Scour Depth at Complex Piers A set of flume experiments was conducted to study the maximum depth of scour for a pier including the effect of shallow water depth, the effect of rectangular shapes, the effect of the angle of attack on rectangular shapes, and the
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From page 112...
... 13.1.6 SRICOS-EFA Method for Initial Scour Rate at Complex Piers A set of numerical simulations was performed to study the maximum shear stress around a pier including the effect of shallow water depth, rectangular shapes, angle of attack on rectangular shapes, and spacing between piers positioned in a row perpendicularly to the flow. The proposed equation for the maximum shear stress is in the form of the equation for the cylindrical pier in deep water with correction factors based on the results of the numerical simulations.
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From page 113...
... 3. Calculate the maximum complex pier scour depth using the ith velocity in the hydrograph at the pier location if there is no contraction scour in Step 2, or the critical velocity for the soil if there is contraction scour in Step 2.
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Key Terms

  • contraction scour
  • cohesive soils
  • rectangular shapes
  • scour depth
  • shear stress

  • factors based
  • pier scour
  • ith velocity
  • attack angle
  • channel length

  • critical shear
  • initial shear
  • maximum shear
  • flume test
  • shallow water

  • erosion function
  • plex pier
  • mum contraction
  • proposed equation
  • pier shape

  • water depth
  • scour method
  • piers positioned
  • maximum scour
  • complex piers

  • contracted channel


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