TRB's National Cooperative Highway Research Program (NCHRP) Report 682: Scour at Wide Piers and Long Skewed Piers explores recommendations for a predictive equation for equilibrium local scour and a potential equation for predicting scour evolution rates at wide piers and skewed piers.
The equations are designed to help provide better estimates of local scour and scour evolution rates than those predicted by currently available equations. Such estimates have the potential to reduce over-predictions and the unwarranted need for countermeasures.
Appendixes A through E for NCHRP Report 682 provide further elaboration on the work performed in this project. The appendixes are only available online.
Table of Contents
|Chapter 2 - Research Approach||6-7|
|Equilibrium Local Scour Data||8-8|
|Assessment of Data Quality||9-13|
|Local Scour Evolution Data||14-15|
|Initial Screening of Equilibrium Scour Predictive Equations||19-23|
|Modifications to Equilibrium Scour Predictive Methods||24-25|
|Evaluation of Equilibrium Scour Predictive Methods||26-36|
|Modifications of Scour Evolution Predictive Methods||40-40|
|Final Evaluation of Scour Evolution Predictive Methods||41-44|
|Chapter 6 - Scour at Piers Skewed to the Flow||45-47|
|Recommendations for Future Research||50-50|
|List of Symbols||53-54|
|Abbreviations used without definitions in TRB publications||56-56|