Evolution of Local Pier-Scour Depth with Dune Migration in Subcritical Flow Conditions
Publication: Journal of Hydraulic Engineering
Volume 143, Issue 4
Abstract
Bridge-pier scour in alluvial rivers often occurs in live-bed conditions with dune migration. The scour depth attains its deepest value when the dune trough reaches the pier, followed by depth reduction when the crest arrives. Therefore, the instantaneous scour depth may be larger than its time-average counterpart. Consequently, accurate prediction of the instantaneous scour depth is pivotal to the safety of the bridge. Although published methods may be used to estimate the temporal variations of pier-scour depth, only few have focused on the live condition. This study presents a prediction method to simulate the temporal evolution of live-bed pier-scour depth. The erosion rate related to the combined effect of the local vortex system and sediment transport into the scour hole associated with the passage of dunes are examined to evaluate the pier-scouring rate. Temporal variations and computed equilibrium time-average scour depth are compared with published data with satisfactory agreement.
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Acknowledgments
The financial support from the Ministry of Science and Technology, Taiwan, under Grant MOST 103-2221-E-492-034 is highly appreciated. The authors also wish to thank Mr. Chao-Chieh Yang for conducting some of the experiments in this study.
References
Ballio, F., Radice, A., and Dey, S. (2010). “Temporal scales for live-bed scour at abutments.” J. Hydraul. Eng., 395–402.
Breusers, H. N. C., Nicollet, G., and Shen, H. W. (1977). “Local scour around cylindrical piers.” J. Hydraul. Res., 15(3), 211–252.
Chabert, J., and Engeldinger, P. (1956). “Étude des affouillements autour des piles de ponts.” Laboratoire National d’Hydraulique, Chatou, France (in French).
Chang, W. Y., Lai, J. S., and Yen, C. L. (2004). “Evolution of scour depth at circular bridge piers.” J. Hydraul. Eng., 905–913.
Chee, R. K. W. (1982). “Live-bed scour at bridge piers.” M.E. thesis, Univ. of Auckland, Auckland, New Zealand.
Chiew, Y. M. (1984). “Local scour at bridge piers.” Ph.D. dissertation, Univ. of Auckland, Auckland, New Zealand.
Chiew, Y. M. (1995). “Mechanics of riprap failure at bridge piers.” J. Hydraul. Eng., 635–643.
Chiew, Y. M. (2004). “Local scour and riprap stability at bridge piers in a degrading channel.” J. Hydraul. Eng., 218–226.
Chiew, Y. M., and Melville, B. W. (1987). “Local scour around bridge piers.” J. Hydraul. Res., IAHR, 25(1), 15–26.
Chiew, Y. M., and Melville, B. W. (1989). “Local scour at bridge piers with non-uniform sediments.” Proc. Instn. Civ. Engrs., Vol. 87(2), 215–224.
Ettema, R., Melville, B. W., and Barkdoll, B. (1998). “Scale effect in pier-scour experiments.” J. Hydraul. Eng., 639–642.
Hancu, S. (1971). “Sur le calcul des affouillements locaux dans la zone des piles du pont.” Proc., 14th IAHR Congress, Vol. 3, Paris, 299–305 (in French).
Hong, J. H., Chiew, Y. M., Lu, J. Y., Lai, J. S., and Lin, Y. B. (2012). “Case study: Houfong bridge failure in Taiwan.” J. Hydraul. Eng., 186–198.
Hong, J. H., Guo, W. D., Chiew, Y. M., and Chen, C. H. (2016). “A new practical method to simulate flood-induced bridge pier scour—A case study of Mingchu bridge piers on the Cho-Shui River.” Water, 8(6), 238.
Jain, S. C., and Fischer, E. E. (1979). “Scour around bridge piers at high Froude numbers.”, Federal Highway Administration, Washington, DC.
Jain, S. C., and Fischer, E. E. (1980). “Scour around bridge piers at high flow velocities.” J. Hydraul. Div., 106(11), 1827–1842.
Kondap, D. M., and Garde, R. J. (1973). “Velocity of bed forms in alluvial channels.” Proc., 15th Congress of Int. Association for Hydraulic Research, Vol. 5, Istanbul, Turkey.
Kothyari, U., and Kumar, A. (2012). “Temporal variation of scour around circular compound piers.” J. Hydraul. Eng., 945–957.
Kothyari, U. C. (1989). “Scour at bridge piers.” Ph.D. dissertation, Univ. of Roorkee, Roorkee, India.
Kothyari, U. C., Garde, R. C. J., and Ranga Raju, K. G. (1992a). “Temporal variation of scour around circular bridge piers.” J. Hydraul. Eng., 1091–1106.
Kothyari, U. C., Ranga Raju, K. G., and Garde, R. J. (1992b). “Live-bed scour around cylindrical bridge piers.” J. Hydraul. Res., 30(5), 701–715.
Lauchlan, C. S. (1999). “Pier scour countermeasures.” Ph.D. thesis, Univ. of Auckland, Auckland, New Zealand.
Lu, J. Y., Shi, Z. Z., Hong, J. H., Lee, J. J., and Raikar, R. V. (2011). “Temporal variation of scour depth at non-uniform cylindrical piers.” J. Hydraul. Eng., 45–56.
Melville, B. W. (1984). “Live-bed scour at bridge piers.” J. Hydraul. Eng., 1234–1247.
Melville, B. W., and Chiew, Y. M. (1999). “Time scale for local scour at bridge piers.” J. Hydraul. Eng., 59–65.
Melville, B. W., and Coleman, S. E. (2000). Bridge scour, Water Resources Publications, Highlands Ranch, CO.
Mia, M. F., and Nago, H. (2003). “Design method of time-dependent local scour at circular bridge pier.” J. Hydraul. Eng., 420–427.
Oliveto, G., and Hager, W. H. (2005). “Further results to time-dependent local scour at bridge elements.” J. Hydraul. Eng., 97–105.
Raudkivi, A. J., and Ettema, R. (1983). “Clear-water scour at cylindrical piers.” J. Hydraul. Eng., 338–350.
Shen, H. W., Schneider, V. R., and Karaki, S. S. (1966). “Mechanics of local scour.” U.S. Dept. of Commerce, National Bureau of Standards, Institute for Applied Technology, Abu Dhabi.
Shen, H. W., Schneider, V. R., and Karaki, S. S. (1969). “Local scour around bridge piers.” J. Hydraul. Div., 95(6), 1919–1940.
Sheppard, D. M., and Miller, W. (2006). “Live-bed local pier scour experiments.” J. Hydraul. Eng., 635–642.
Simons, D. B., Richardson, E. V., and Nordin, C. F. (1965). “Bedload equation for ripples and dunes.” Professional Paper 462 H, U.S. Geological Survey, Washington, DC.
Simons, D. B., and Richardson, E. V. (1961). “Forms of bed roughness in alluvial channels.” J. Hydraul. Div., 87(3), 87–105.
van Rijn, L. C. (1984a). “Sediment transport. Part I: Bed load transport.” J. Hydraul. Eng., 1431–1456.
van Rijn, L. C. (1984b). “Sediment transport. Part III: Bed forms and alluvial roughness.” J. Hydraul. Eng., 1733–1754.
Verstappen, E. L. (1978). “Non-steady local scour at a cylindrical pier.” Ph.D. dissertation, Univ. of Cantebury, Christchurch, New Zealand.
Yalin, M. S. (1977). Mechanics of sediment transport, 2nd Ed., Pergamon Press, Oxford, U.K.
Yanmaz, A., and Altinbilek, H. (1991). “Study of time-dependent local scour around bridge piers.” J. Hydraul. Eng., 1247–1268.
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Journal of Hydraulic Engineering
Volume 143 • Issue 4 • April 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Apr 22, 2016
Accepted: Aug 16, 2016
Published online: Nov 7, 2016
Published in print: Apr 1, 2017
Discussion open until: Apr 7, 2017
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