Live-Bed Scour at Wide and Long-Skewed Bridge Piers in Comparatively Shallow Water
Publication: Journal of Hydraulic Engineering
Volume 145, Issue 5
Abstract
An investigation of the characteristics of live-bed scour at circular and skewed rectangular (slab) piers in comparatively shallow flows is presented. The 110 experiments were undertaken in a 2.4-m flume using two circular piers and a slab (long) pier. Based on flow shallowness, that is, the ratio of approaching flow depth () to pier diameter (), the new data span the wide-pier () and transition-pier () scour ranges. The Sheppard-Melville (S-M) method shows better performance than the other existing predictors and is more readily modified. Modification to the equation for the flow shallowness factor in the S-M method is proposed, based on both the data from the present study and those from literature. The results show the considerable influence of flow shallowness ratio on scour depth at piers in comparatively shallow water, and that, even for non–ripple-forming sediment, the scour depth at the live-bed peak may still exceed that at the clear-water threshold. The modified predictor provides better accuracy than the original Sheppard-Melville method for piers with , and no significant underestimation of the maximum scour depth is observed.
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Acknowledgments
The authors would like to thank China Scholarship Council (CSC) for the financial support of this research. In particular, the first author would like to thank Ms. Yu Huang for her precious help during the past years.
References
Arneson, L. A., L. W. Zevenbergen, P. F. Lagasse, and P. E. Clopper. 2012. Evaluating scour at bridges. 5th ed. Washington, DC: Federal Highway Administration.
Breusers, H. N. C., G. Nicollet, and H. W. Shen. 1977. “Local scour around cylindrical piers.” J. Hydraul. Res. 15 (3): 211–252. https://doi.org/10.1080/00221687709499645.
Chabert, J., and P. Engeldinger. 1956. Étude des affouillements autour des piles de ponts. Chatou, France: Laboratoire National d’Hydraulique.
Chee, R. K. W. 1982. “Live-bed scour at bridge piers.” M.E. dissertation, Dept. of Civil Engineering, Univ. of Auckland.
Chiew, Y. M. 1984. “Local scour at bridge piers.” Ph.D. dissertation, Dept. of Civil Engineering, Univ. of Auckland.
Ettema, R., G. Constantinescu, and B. W. Melville. 2011. Evaluation of bridge scour research: Pier scour processes and predictions. Washington, DC: National Cooperative Highway Program.
Ettema, R., G. Constantinescu, and B. W. Melville. 2017. “Flow-field complexity and design estimation of pier-scour depth: Sixty years since Laursen and Toch.” J. Hydraul. Eng. 143 (9): 03117006. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001330.
Ettema, R., E. A. Mostafa, B. W. Melville, and A. A. Yassin. 1998. “Local scour at skewed piers.” J. Hydraul. Eng. 124 (7): 756–759. https://doi.org/10.1061/(ASCE)0733-9429(1998)124:7(756).
Ettmer, B., F. Orth, and O. Link. 2015. “Live-bed scour at bridge piers in a lightweight polystyrene bed.” J. Hydraul. Eng. 141 (9): 04015017. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001025.
Guan, D., B. W. Melville, and H. Friedrich. 2015. “Live-bed scour at submerged weirs.” J. Hydraul. Eng. 141 (2): 04014071. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000954.
Hancu, S. 1971. “Sur le calcul des affouillements locaux dans la zone des piles du pont.” [In French.] In Vol. 3 of Proc., 14th IAHR Congress, 299–305. Delft, Netherlands: International Association for Hydraulic Research.
Hong, J. H., Y. M. Chiew, P. H. Yeh, and H. C. Chan. 2016. “Evolution of local pier-scour depth with dune migration in subcritical flow conditions.” J. Hydraul. Eng. 143 (4): 04016098. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001261.
Jain, S. C., and E. E. Fischer. 1979. Scour around bridge piers at high Froude numbers. Washington, DC: Federal Highway Administration.
Jain, S. C., and E. E. Fischer. 1980. “Scour around bridge piers at high flow velocities.” J. Hydraul. Div. 106 (11): 1827–1842.
Johnson, P. A., and E. F. Torrico. 1994. “Scour around wide piers in shallow water.” Transp. Res. Rec. 1471: 66–70.
Kothyari, U. C., K. G. Ranga Raju, and R. J. Garde. 1992. “Livebed scour around cylindrical bridge piers.” J. Hydraul. Res. 30 (5): 701–715. https://doi.org/10.1080/00221689209498889.
Laursen, E. M. 1962. “Scour at bridge crossings.” Trans. Am. Soc. Civ. Eng. 127 (1): 166–179.
Laursen, E. M., and A. Toch. 1956. Scour around bridge piers and abutments. Ames, IA: Iowa Highways Research Board.
Melville, B. W. 1984. “Live-bed scour at bridge piers.” J. Hydraul. Eng. 110 (9): 1234–1247. https://doi.org/10.1061/(ASCE)0733-9429(1984)110:9(1234).
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. J. Raudkivi. 1996. “Effect of foundation geometry on bridge pier scour.” J. Hydraul. Eng. 122 (4): 203–209. https://doi.org/10.1061/(ASCE)0733-9429(1996)122:4(203).
Mostafa, E. A. 1994. “Scour around skewed bridge piers.” Ph.D. dissertation, Dept. of Irrigation and Hydraulics, Alexandria Univ.
Mostafa, E. A., R. Ettema, and B. W. Melville. 1996. “Simplified approach for maximum scour at skewed piers.” Alexandria Eng. J. 35 (2): C47–C60.
Mostafa, E. A., A. A. Yassin, and B. W. Melville. 1993. “Local scour at skewed bridge piers.” In Vol. 1 of Proc., 1993 National Conf. on Hydraulic Engineering, 1037–1048. Reston, VA: ASCE.
Radice, A., and O. Lauva. 2017. “Live-bed pier scour in a covered flow.” J. Hydraul. Eng. 143 (10): 06017016. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001359.
Shen, H. W., V. R. Schneider, and S. Karaki. 1966. Mechanics of local scour. Fort Collins, CO: Colorado State Univ.
Sheppard, D. M., and W. Miller. 2006. “Live-bed local pier scour experiments.” J. Hydraul. Eng. 132 (7): 635–642. https://doi.org/10.1061/(ASCE)0733-9429(2006)132:7(635).
Sheppard, D. M., and R. Renna. 2010. Bridge scour manual. Tallahassee, FL: Florida Dept. of Transportation.
Sheppard, M., H. Demir, and B. W. Melville. 2011. “Scour at wide piers and long skewed piers.”. Washington, DC: National Cooperative Highway Program.
Wang, L., B. W. Melville, and D. Guan. 2018. “Effects of upstream weir slope on local scour at submerged weirs.” J. Hydraul. Eng. 144 (3): 04018002. https://doi.org/10.1061/(ASCE)HY.1943-7900.0001431.
White, W. R. 1975. “Scour around bridge piers in steep streams.” In Vol. 2 of Proc., 16th IAHR Congress, 279–284. Delft, Netherlands: International Association for Hydraulic Research.
Yang, Y. 2019. “Data of live-bed scour at wide and long-skewed bridge piers in comparatively shallow water.” https://drive.google.com/file/d/1ybIdH2v6eEUFT-Xyo_w5Ccu6mKvwfYhg/view?usp=sharing.
Zeng, J., and G. Constantinescu. 2017. “Flow and coherent structures around circular cylinders in shallow water.” Phys. Fluids 29 (6): 066601. https://doi.org/10.1063/1.4984926.
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Published In
Journal of Hydraulic Engineering
Volume 145 • Issue 5 • May 2019
Copyright
©2019 American Society of Civil Engineers.
History
Received: Feb 14, 2018
Accepted: Nov 8, 2018
Published online: Feb 27, 2019
Published in print: May 1, 2019
Discussion open until: Jul 27, 2019
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