Mapping scour depth around group bridge pier under controlled conditions

Document Type : Research Paper

Authors

1 Department of Civil Engineering, University of Maragheh, Maragheh, Iran.

2 Department of Civil Engineering, Malekan Branch, Islamic Azad University, Malekan, Iran.

3 Department of Civil Engineering, Ramhormoz branch, Islamic Azad University, Ramhormoz, Iran.

Abstract

As a destructive process, scouring exposes bridge foundations to failure and disastrous consequences. Control structures of various arrangements are capable to change and manage the adverse effects. This paper aims to investigate the effect of submerged vanes of a quasi-triangular arrangement (of heights 0, 4, and 6 cm), eppi, and sills (of height 4.5 and 9 cm) on scour development. All tests were executed in a rectangular slope-less flume covered with sediments of D50=1.8 mm. Temporal and equilibrium scour depth were mapped for Froud numbers: 0.15, 0.2, 0.25, and 0.6. Results clarified the aggregate effect of the eppies on the scour depth due to section contraction. Submerged vanes and sill were set up to deteriorate sediment transport. Although the vane of height 4 cm had the most superior performance, but the sill installation of height 4.5 cm greatly increased vane's effect, so that a remarkable reduction of scour was occurred at the first pier foundation.

Keywords

References

  1. Zomorodian AMA, Ghafari H, Ghasemi Z, (2019). Comparison of Linear and Triangular Arrangements of Submerged Sacrificial Piles on Local Scour Depth around Cylindrical Bridge Piers, Irrigation Sciences and Engineering, 42(4), pp: 167-180.
  2. Habib IB, Mohtar WHMW, Shahot KM, El Shafie A, Manan TSA, (2021). Bridge Failure Prevention: An Overview of Self-Protected Pier as Flow Altering Countermeasures for Scour Protection, Civil Engineering Infrastructures Journal, 54(1), pp: 1-22.
  3. Solimani Babarsad M, Hojatkhah A, Safaei A, Aghamajidi R, (2021). Investigating the effect of deflector structureon bridge pier scouring, Irrigation Sciences and Engineering, 43(4), pp: 91-104.
  4. Nikkhah S, Amanian N, Avazpoor F, (2021). Experimental estimation of afflux equation in circular and semicircular nose and tail shape of piers by considering effective parameters, Quranic Knowledge Research, 20(6), pp: 105-114.
  5. Rasaei M, Nazari S, (2020). Experimental and Numerical Investigation of Local Scouring around Bridge Piers in Different Geometric Shapes at a 90° Convergent meander, Journal of Hydraulic Structures, 6(2), pp: 34-55.
  6. Keshavarzi AR, Hamidifar H, Khajehnoori L, (2019). Mean Flow Structure and Local Scour around Single and Two-Column Bridge Piers, Irrigation Sciences and Engineering, 42(4), pp: 75-90.
  7. Karimaei Tabarestani M, Zarrati A, (2019). Estimation of time development of local scour around rectangular bridge pier in an unsteady flow condition, Journal of Hydraulics, 14(1), pp: 49-64.
  8. Bahrami N, Ghomeshi M, (2018). Effect of Netted Collar on Maximum Local Scouring Depth of Cubic Bridge Pile Groups, Amir Kabir Civil Engineering Journal, 50(4), pp:655-664.
  9. Arab HA, Esmaili K, Beheshti AA, Akbarzadeh MR, (2017). The Effect of Sill to Reduce Scour Around Bridge Piers in Flood Flow Conditions, Iranian Journal of Irrigation & Drainage, 11(1), pp: 69-79.
  10. Arab M, Zomorodian MA, (2016). Interaction of Bridge Pier and Abutment on Local Scour Around Them, Irrigation Sciences and Engineering, 39(1), pp: 131-142.
  11. Memar S, Hosseinzadeh Dalir A, Arvnaghi H, (2016). An Experimental Study of Impact of Bridge Pier on Depth of Scour Hole in Abutment, 26(2), pp: 59-67.
  12. Tafarojnoruz A, Gaudio R, Calomino F, (2012).  Control against bridge pier scour , Journal of Hydraulic Engineering, 138(3), pp: 297-305.
  13. Movahedi N, Dehghani AA, Aarabi MJ, Zahiri AR, (2014). Experimental study of local scouring around two side-by-side piers with raft footing, Water and Soil Conservation, 21(1), pp: 199-215.
  14. Hosseinzadeh Dalir, A., Farsadizadeh, D., Shojaee, P. (2011), Effects of Combined submerged vane and collar on the scour reduction around Cylindrical bridge piers, Journal of Agricultural Science and Technology, 15(57), pp:23-33.
  15. Grimaldi C, Gaudio R, Calomino F, Cardoso AH, (2009). Control of Scour at Bridge Piers by a Downstream Bed Sill, Journals of hydraulic engineering, 135(1), pp: 1038-1043
  16. Ghorbani B, Kells  JA (2008). Effect of submerged vanes on the occouring at a cylindrical pier, Journal of hydraulic Eng. Res., 5, pp: 610-619.
  17. Chiew YM, Melville BW, (1987). Local Scour around Bridge Piers. Journal of Hydraulic Research, 25(1), pp: 15- 26
  18. Johnson PA, Hey RD, Tessier M, Rosgen DL (2001). Use of vanes for control of scour at vertical wall abutments. Journal of hydraulic Eng., ASCE., 127(9), pp:772-778.
  19. Odgaard AJ, Kennedy Y, (1983). River-bend bank protection by submerged vane, Journal of hydraulic Eng. ASCE. 109, pp: 1116-1173.
  20. Melville BW (1984). Live-bed scour at bridge sites. Journal of Hydraulic Engineering, A.S.C.E., 110(9), pp:1234-1247.
Journal of Hydraulic Structures
Volume 8, Issue 4 - Serial Number 22
February 2023
Pages 57-72

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