Effect of Transversal Bed Slope on the Equilibrium Scour Depth at Bridge Piers
Publication: Journal of Hydraulic Engineering
Volume 150, Issue 4
Abstract
This study focused on the effect of the transversal bed slope on scouring at bridge piers. Twenty-four experiments were conducted, half of them being on a horizontal bed and the other half on inclined beds. Three inclination angles, three flow intensities, and three pier diameters were combined within the degrees of freedom of the available experimental setup. Velocity measurements were performed to characterize the velocity field at triangular cross sections. Contrary to intuition, it was concluded that the equilibrium scour depth around cylindrical piers inserted in an erodible inclined bed decreases with the inclination angle for angles between approximately 11° and 25°, which suggests that practitioners can safely use scour depth predictors derived for horizontal beds to calculate the scour depth at inclined beds, provided that they properly assess the approach flow velocity and the critical velocity for the beginning of sediment motion on inclines. Within the range of nondimensional values covered by this study, practitioners can also use a new scour depth predictor.
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Data Availability Statement
All the data that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
This work was financially supported by the Turkish Science and Technology Research Council (TUBITAK) under Project No. 116M519. The authors would like to thank Bedriye Bilge Kilinç, Waheedullah Mohammad Khail, and Ebru Taşkaya, who carried out most of the experimental work as part of their M.Sc. theses and graduation projects.
References
Ballio, F., A. Teruzzi, and A. Radice. 2009. “Constriction effects in clear-water scour at abutments.” J. Hydraul. Eng. 135 (2): 140–145. https://doi.org/10.1061/(ASCE)0733-9429(2009)135:2(140).
Baltazar, J. V. 2023. “Sediment control at lateral water intakes through submerged vane fields.” Ph.D. thesis, Instituto Superior Técnico, Universidade de Lisboa.
Bertoldi, D. A., and J. S. Jones. 1998. “Time to scour experiments as an indirect measure of stream power around bridge piers.” In Proc., Int. Water Resource Engineering Conf., 264–269. Reston, VA: ASCE.
Breusers, H. N. C., and A. J. Raudkivi. 1991. Scouring, hydraulic structures design manual series. 1st ed. London: CRC Press.
Canelas, O. B. 2019. “Experimental study of the flow dynamics on movable bed open-channel confluences.” Ph.D. thesis, Instituto Superior Técnico, Universidade de Lisboa.
Cardoso, A. H., W. Graf, and G. Gust. 1989. “Uniform flow in a smooth open channel.” J. Hydraul. Res. 27 (5): 603–616. https://doi.org/10.1080/00221688909499113.
Chang, H. H. 1998. Fluvial processes in river engineering. New York: Wiley.
Coleman, S. E., C. S. Lauchlan, and B. W. Melville. 2003. “Clear-water scour development at bridge abutments.” J. Hydraul. Res. 41 (5): 521–531. https://doi.org/10.1080/00221680309499997.
Dey, S. 2003. “Threshold of sediment motion on combined transverse and longitudinal sloping beds.” J. Hydraul. Res. 41 (4): 405–415. https://doi.org/10.1080/00221680309499985.
Fael, C. M. S. 2007. “Erosões localizadas junto de encontros de pontes e respetivas medidas de proteção.” [In Portuguese.] Ph.D. thesis, Dept. of Civil Engineering, Universidade da Beira Interior.
Fael, C. M. S., G. Simarro, J. P. Martin-Vide, and A. H. Cardoso. 2006. “Local scour at vertical-wall abutments under clear water flow conditions.” Water Resour. Res. 42 (10): W10408. https://doi.org/10.1029/2005WR004443.
Franzetti, S., E. Larcan, and P. Mignosa. 1982. “Influence of tests duration on the evaluation of ultimate scour around circular piers.” In Proc., Int. Conf. on the Hydraulic Modelling of Civil Engineering Structures. Bedford, England: BHRA Fluid Engineering.
Franzetti, S., A. Radice, D. Rebai, and F. Ballio. 2022. “Clear water scour at circular piers: A new formula fitting laboratory data with less than 25% deviation.” J. Hydraul. Eng. 148 (10): 04022021. https://doi.org/10.1061/(ASCE)HY.1943-7900.0002009.
Goring, D. G., and V. I. Nikora. 2002. “Despiking acoustic Doppler velocimeter data.” J. Hydraul. Eng. 128 (1): 117–126. https://doi.org/10.1061/(ASCE)0733-9429(2002)128:1(117).
Grimaldi, C. 2005. “Non-conventional countermeasures against local scouring at bridge piers.” Ph.D. thesis, Dept. of Civil Engineering, Univ. of Calabria.
Julien, P. Y. 1995. Erosion and sedimentation. New York: Cambridge University Press.
Kothyari, U. C., R. C. J. Garde, and K. G. R. Raju. 1992. “Temporal variation of scour around circular bridge piers.” J. Hydraul. Eng. 118 (8): 1091–1106. https://doi.org/10.1061/(ASCE)0733-9429(1992)118:8(1091).
Lança, R. M. 2013. “Clear-water scour at single piers and pile groups.” Ph.D. thesis, Dept. of Civil Engineering, Universidade da Beira Interior.
Lança, R. M., C. S. Fael, and A. H. Cardoso. 2010. Assessing equilibrium clear water scour around single cylindrical piers, 1207–1213. Karlsruhe, Germany: Bundesanstalt für Wasserbau.
Lança, R. M., C. S. Fael, R. J. Maia, J. P. Pêgo, and A. H. Cardoso. 2013. “Clear-water scour at comparatively large cylindrical piers.” J. Hydraul. Eng. 139 (11): 1117–1125. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000788.
Lee, S. O., and T. W. Sturm. 2009. “Effect of sediment size scaling on physical modelling of bridge pier scour.” J. Hydraul. Eng. 135 (10): 793–802. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000091.
Melville, B. W. 1997. “Pier and abutment scour: Integrated approach.” J. Hydraul. Eng. 123 (2): 125–136. https://doi.org/10.1061/(ASCE)0733-9429(1997)123:2(125).
Melville, B. W., and Y. M. Chiew. 1999. “Time scale for local scour at bridge piers.” J. Hydraul. Eng. 125 (1): 59–65. https://doi.org/10.1061/(ASCE)0733-9429(1999)125:1(59).
Melville, B. W., and S. E. Coleman. 2000. Bridge scour. Highlands Ranch, CO: Water Resources Publications.
Melville, B. W., and A. I. Sutherland. 1988. “Design method for local scour at bridge piers.” J. Hydraul. Eng. 114 (10): 1210–1226. https://doi.org/10.1061/(ASCE)0733-9429(1988)114:10(1210).
Nezhada, H. M., M. Mohammadi, A. Ghaderi, M. Bagherzadeh, A. M. Ricardoc, and A. Kuriqic. 2022. “Flow resistance and velocity distributions in channels with triangular cross-section.” J. Exp. Res. Civ. Eng. 2 (5): 5253–5264. https://doi.org/10.1061/(ASCE)0733-9429(1986)112:5(335).
Nezu, I., and W. Rodi. 1986. “Open-channel flow measurements with a laser Doppler anemometer.” J. Hydraul. Eng. 112 (5): 335–355. https://doi.org/10.1061/(ASCE)0733-9429(1986)112:5(335).
Oliveto, G., and W. H. Hager. 2002. “Temporal evolution of clear-water pier and abutments scour.” J. Hydraul. Eng. 128 (9): 811–820. https://doi.org/10.1061/(ASCE)0733-9429(2002)128:9(811).
Oliveto, G., and W. H. Hager. 2005. “Further results on time-dependent local scour at bridge elements.” J. Hydraul. Eng. 131 (2): 97–105. https://doi.org/10.1061/(ASCE)0733-9429(2005)131:2(97).
Shen, H. W., V. R. Schneider, and S. Karki. 1969. “Local scour around bridge piers.” J. Hydraul. Eng. 95 (6): 1919–1940. https://doi.org/10.1061/JYCEAJ.0002197.
Sheppard, D. M., M. Odeh, and T. Glasser. 2004. “Large scale clear-water local pier scour experiments.” J. Hydraul. Eng. 130 (10): 957–963. https://doi.org/10.1061/(ASCE)0733-9429(2004)130:10(957).
Simarro, G., C. M. S. Fael, and A. H. Cardoso. 2011. “Estimating equilibrium scour depth at cylindrical piers in experimental studies.” J. Hydraul. Eng. 137 (9): 1089–1093. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000410.
van Rijn, L. 1984. “Sediment transport, Part III: Bed forms and alluvial roughness.” J. Hydraul. Eng. 110 (12): 1733–1754. https://doi.org/10.1061/(ASCE)0733-9429(1984)110:12(1733).
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© 2024 American Society of Civil Engineers.
History
Received: Apr 20, 2023
Accepted: Jan 21, 2024
Published online: Apr 8, 2024
Published in print: Jul 1, 2024
Discussion open until: Sep 8, 2024
ASCE Technical Topics:
- Bed materials
- Bridge engineering
- Bridges
- Engineering mechanics
- Equilibrium
- Geomechanics
- Geotechnical engineering
- Hydraulic engineering
- Hydraulic structures
- Hydraulics
- Piers
- Ports and harbors
- River and stream beds
- River engineering
- Rivers and streams
- Scour
- Slopes
- Statics (mechanics)
- Structural engineering
- Water and water resources
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