Pier With Exposed Pile Cap and Pile Group
ABSCOUR uses the same concepts and provides the same answers as HEC-18 in determining the scour depth at a complex pier. This method uses a superposition method to determine the total scour for this case. The total scour is the sum of the scour components for the pier stem in the flow, the component for the pile cap in the flow and the scour component for the pile group in the flow.
ys= (ys)pier + (ys)pc + (ys)pg
Where:
ys is the total scour depth
(ys)pier is the scour component for the pier stem in the flow
(ys)pc is the scour component for the pile cap in the flow
(ys)pg is the scout component for the pile group in the flow
For more information, refer to the FHWA Manual HEC-18 for details on how to calculate (ys)pier, (ys)pc and (ys)pg