Effects of Hydraulic Characteristics, Sedimentary Parameters, and Mining of Bed Material on Scour Depth of Bridge Pier Groups
Publication: Journal of Performance of Constructed Facilities
Volume 35, Issue 2
Abstract
The purpose of this study is to investigate the effect on flow hydrodynamics of grading of the bed and the mining of sand from the river bed around a bridge pier group. In total, 22 experiments with two different bed gradings (‘A’ and ‘B’), three different discharge rates, and Froude numbers were performed. In order to investigate the effect of mining on scour rate, the mining of material was carried out both upstream and downstream of the pier group. It was observed that the mining from downstream locations led to an increased scouring around the pier group. At a Froude number of 0.5, the existence of a pit hole downstream of the pier group causes a 3% and 9.7% increase in the maximum scour depth for grading ‘A’ and ‘B’, respectively. On the other hand, mining materials from upstream locations and for the same Froude number decreased scouring by 9% for ‘A’ grading and 8.1% for ‘B’ grading. A regression method was used to provide an equation that can be used to estimate the scour depth.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
References
Beg, M. 2008. “Scour reduction by using a collar around a pier group.” In Proc., 4th Int. Conf. on Scour and Erosion. Karlsruhe, Germany: Federal Waterways Engineering and Research Institute.
Bozkuş, Z., M. C. Özalp, and A. E. Dinçer. 2018. “Effect of pier inclination angle on local scour depth around bridge pier groups.” Arabian J. Sci. Eng. 43 (10): 5413–5421. https://doi.org/10.1007/s13369-018-3141-2.
Desine, M. 2018. “Laboratory review of the transfer of pits made under the influence of riverbed materials.” [In Persian.] Master’s thesis, Civil Engineering Dept., Maragheh Univ.
Dey, S., and R. V. Raikar. 2007. “Characteristics of horseshoe vortex in developing scour holes at piers.” J. Hydraul. Eng. 122 (4): 299–412. https://doi.org/10.1061/(ASCE)0733-9429(2007)133%3A4(399).
Healy, T., and K. Wo. 2002. “Sediment characteristic and bed level changes in relation to sand extractions and damming of sand-gravel River: The lower Waikato River.” J. Hydrol. (NZ) 41 (2): 175–196.
Henderson, F. 1966. Open channel flow. New York: Springer.
Johnson, P. A. 2005. “Preliminary assessment and rating of stream channel stability.” J. Hydraul. Eng. 131 (10): 845–852. https://doi.org/10.1061/(ASCE)0733-9429(2005)131:10(845).
Johnson, P. A., G. Gleason, and R. D. Hey. 1999. “Rapid assessment of channel stability in vicinity of road crossing.” J. Hydraul. Eng. 125 (6): 645–651. https://doi.org/10.1061/(ASCE)0733-9429(1999)125:6(645).
Julien, P. Y. 2010. Erosion and sedimentation. Cambridge, MA: Cambridge University Press.
Khan, M., M. Tufail, M. Ajmal, Z. U. Haq, and T. W. Kim. 2017. “Experimental analysis of the scour pattern modeling of scour depth around bridge piers.” Arabian J. Sci. Eng. 42 (9): 4111–4130. https://doi.org/10.1007/s13369-017-2599-7.
Kondolf, G. M. 1997. “Effects of dams and gravel mining on rivers.” Environ. Manage. 21 (4): 533–551.
Lade, A. D., V. Deshpande, B. Kumar, and G. Oliveto. 2019. “On the morphodynamic alterations around bridge piers under the influence of instream mining.” Water 11 (8): 1676. https://doi.org/10.3390/w11081676.
Lee, S. O., and T. W. Sturm. 2009. “Effect of sediment size scaling on physical modeling of bridge pier scour.” J. Hydraul. Eng. 125 (10): 792–802. https://doi.org/10.1061/(ASCE)HY.1943-7900.0000091.
Majedi-Asl, M., R. Daneshfaraz, and S. Valizadeh. 2018. “Experimental investigating effect of river materials mining on scouring around armed pier groups.” Iran. J. Soil Water Res. 50 (6): 1363–1380. https://doi.org/10.22059/ijswr.2019.269942.668062.
Melville, B. W., and Y. M. Chiew. 1999. “Time scale for local scour at bridge piers.” J. Hydraul. Eng. 1251 (1): 59–65. https://doi.org/10.1061/(ASCE)0733-9429(1999)125:1(59).
Mia, M. F., and H. Nago. 2003. “Design method of time-dependent local scour at circular bridge pier.” J. Hydraul. Eng. 129 (6): 420–427. https://doi.org/10.1061/(ASCE)0733-9429(2003)129:6(420).
Özalp, M. C., and Z. Bozkuş. 2012. “Experimental investigation of local scour around bridge pier groups.” M.Sc. thesis, Dept. of Civil Engineering, The Graduate School of Natural and Applied Sciences of Middle East Technical Univ.
Raudkivi, A. J., and R. Ettema. 1983. “Clear-water scour at cylindrical piers.” J. Hydraul. Eng. 109 (2): 228–250. https://doi.org/10.1061/(ASCE)0733-9429(1983)109%3A3(338).
Rezaei, M., R. Daneshfaraz, and M. Dasine. 2018. “Experimental investigation on the effect of adding cationic and polyacrylamide caps on the scouring of pit bases and pit buildings under the effects of river matter.” [In Persian.] J. Hydraul. 13 (3): 59–70. https://doi.org/10.30482/jhyd.2018.81358.
Rinaldi, M., and A. Simon. 1998. “Bed-level adjustments in the Arno River, Central Italy.” Geomorphology 22 (1): 57–71.
Zarrati, A. R., M. R. Chamani, A. Shafaie, and M. Latifi. 2010. “Scour countermeasures for cylindrical piers using riprap and combination of collar and riprap.” Int. J. Sediment Res. 25 (3): 313–322. https://doi.org/10.1016/S1001-6279(10)60048-0.
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© 2020 American Society of Civil Engineers.
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Received: Apr 4, 2020
Accepted: Aug 31, 2020
Published online: Dec 21, 2020
Published in print: Apr 1, 2021
Discussion open until: May 21, 2021
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