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Pier and Contraction Scour in Cohesive Soils (2004) / Chapter Skim
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Pages 8-9

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From page 8...
... Method to predict the scour depth as a function of time when a cylindrical pier founded in a layered soil is subjected to long-term, deep water flow. In this NCHRP project, the SRICOS-EFA Method was extended to the case of complex piers and contraction scour.
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From page 9...
... Therefore, for cohesive soils it becomes necessary to consider the rate of erosion and the cumulative effect of multiple floods. 1.5 APPROACH SELECTED TO SOLVE THE PROBLEM The approach selected to solve the problem of predicting the scour depth versus time for complex piers in a contracted channel and for a given velocity hydrograph was based on a combination of existing knowledge review, flume tests, 9 numerical simulations, fundamental principles in method development, and verification of the method against available data.
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Key Terms

  • contraction scour
  • cohesive soils
  • nchrp project
  • scour depth
  • shear stress

  • pier scour
  • calculated initial
  • attack angle
  • initial shear
  • local scour

  • flume test
  • erosion function
  • plex pier
  • simulation results
  • water depth

  • maximum scour
  • txdot project
  • complex piers
  • contracted channel


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