Local Scour at Skewed Piers
Publication: Journal of Hydraulic Engineering
Volume 124, Issue 7
Abstract
Dimensional analysis of the variables influencing local scour at skewed piers brings into issue the generality of skew factors apparently related only to skew angle, α, and pier aspect ratio, L/b, for a particular pier shape. This note discusses this issue and provides insights into flow-field and scour-geometry changes at skewed piers. It shows that the skew factor, Kα, as used in pier-scour equations to account for the influence on scour depth of pier orientation (skew) to flow, is influenced by parameters in addition to skew angle and pier aspect ratio. The parameters define the local flow field around the pier and determine the eventual scour depth and form in ways not fully taken into account by existing relationships for Kα. Those relationships, however, retain their usefulness as upper-bound envelopes for estimating Kα values for piers in comparatively shallow flows, especially for α less than about 45°.
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References
1.
Chabert, J., and Engeldinger, P. (1956). Etude des affouillements autour des piles des ponts. Laboratorie National d'Hydraulique, Chatou, France (in French).
2.
“Evaluating Scour at Bridges.” (1993). Hydraulic Engrg. Circular No. 18, FHWA-IP-90-017, Federal Highway Administration, U.S. Department of Transportation, McLean, Va.
3.
Larras, J. (1963). “Profondeurs maximales d'erosion des fonds mobiles autour des piles en Riviere.”Annales des Ponts et Chausses, 133(4), 441–424 (in French).
4.
Laursen, E. M., and Toch, A. (1956). “Scour around bridge piers and abutments.”Bull. No. 4, Iowa Highway Research Board, Iowa City, Iowa.
5.
Maza, J. A., and Sanchez, J. L. (1964). “Contribucion al estudio de la socovacion local en pilas de puente.”Rep., Universidad Federal do Rio Grande do Sul, Mexico City, Mexico.
6.
Melville, B. W.(1997). “Pier and abutment scour: integrated approach.”J. Hydr. Engrg., ASCE, 123(2), 125–136.
7.
Melville, B. W., and Sutherland, A.(1988). “Design method for local scour at piers.”J. Hydr. Div., ASCE, 114(10), 1210–1226.
8.
Mostafa, E. A. (1994). “Scour around skewed bridge piers,” PhD thesis, Dept. of Irrigation and Hydraulics, Alexandria University, Alexandria, Egypt.
Information & Authors
Information
Published In
Journal of Hydraulic Engineering
Volume 124 • Issue 7 • July 1998
Pages: 756 - 759
Copyright
Copyright © 1998 American Society of Civil Engineers.
History
Published online: Jul 1, 1998
Published in print: Jul 1998
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