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The Effect of Inclined Pair Piers on Bed Topography: Clear Water, Incipient Motion and Live Bed

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Abstract

In this study, effects of inclined pair piers on bed topography in a scaled river bend were experimentally investigated. Three separate groups of experiments under clear water, incipient motion and movable bed conditions were performed. The results showed that for a pair of V-shaped piers, the scouring was higher for the pier closer to the bend outer perimeter, while the opposite trend was observed for the Ʌ-shaped piers. It was observed that shifting the position of Ʌ-shaped piers from the 60 degree angle to 90 and 120 degree angles led to 6% and 26% increase in the peak scour depth, while, for the V-shaped piers, the position that led to the maximum scour depth varied depending on the flow regime. The maximum scour depth, which was 117% of the flow depth, was observed in the live bed experiment in which the V-shaped piers were placed at the f 60° plane. Under the live bed condition, it was seen that piers closer to the inner bank are less susceptible to scouring.

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Abbreviations

R:

Central radius

B:

Channel width

D:

Bridge pier diameter

ds:

Maximum scouring depth

Fr:

Froude number

h :

The maximum height of the sediment

Re:

Reynolds number

t :

Time of scour

t e :

Equilibrium time of scour

σ:

Standard deviation of sediment

θ:

Angular position of the piers

d50 :

Mean diameter of the sediment

d84 :

Diameter, in millimeters at which 84% of the sediment is finer

d16 :

Diameter, in millimeters at which 16% of the sediment is finer

y:

Depth of water at the beginning of the bend

U:

Flow velocity

Uc :

Critical velocity

Z:

Level of the bed

W:

Surrounded rectangle width on the scour hole

L:

Surrounded rectangle length at the scour hole

g:

Acceleration of gravity

Gs:

Specific weight

References

  • Abdelhaleem FSF (2019) Roughened bridge piers as a scour countermeasure under clear water conditions. ISH J Hydraul Eng 25(1):94–103

    Article  Google Scholar 

  • Ahmed SI, Khassaf SI (2020) Study the local scour around different shapes of non-uniform piers. Basrah J Eng Sci 20(1):12–14

    Article  Google Scholar 

  • Aksoy AO, Bombar G, Arkis T, Guney MS (2017) Study of the time- dependent clear water scour around circular bridge piers. J Hydrol Hydromech 65(1):26–34

    Article  Google Scholar 

  • Ben Mohammad Khajeh, S., Vaghefi, M., & Mahmoudi, A. (2017) The scour pattern around an inclined cylindrical pier in a sharp 180-degree bend: an experimental study. Int J River Basin Manag 15(2):207–218

    Article  Google Scholar 

  • Blanckaert, K., & Graf, W. H. (1999). Outer-bank cell of secondary circulation and boundary shear stress in open-channel bends. Proc., 1st River, Coastal, and Estuarine Morphodynamics (RCEM), pp 533–543.

  • Booij R (2003) Measurements and large eddy simulations of the flows in some curved flumes. J Turbul 4(1):1–17

    Google Scholar 

  • Bozkus Z, Yildiz O (2004) Effects of inclination of bridge piers on scouring depth. J Hydraul Eng 130(8):827–832

    Article  Google Scholar 

  • Chiew Y (1992) Scour protection at bridge piers. J Hydraul Eng 118(9):1260–1269

    Article  Google Scholar 

  • Chiew YM, Melville BW (1987) Local scour around bridge piers. J Hydraul Res 25(1):15–26

    Article  Google Scholar 

  • Corney RK, Peakall J, Parsons DR, Elliott L, Amos KJ, Best JL, Keevil GM, Ingham DB (2006) The orientation of helical flow in curved channels. Sedimentology 53:249–257

    Article  Google Scholar 

  • Emami, Y., Salamatian, S. A., & Ghodsian, M. (2008). Scour at cylindrical bridge pier in a 180 degree channel bend. In: Proceedings 4th international conference on scour and erosion (ICSE-4)". November 5–7, 2008, Tokyo, Japan: 256–262.

  • Ettema R, Mostafa EA, Melville BW, Yassin AA (1998) Local scour at skewed piers. J Hydraul Eng 124(7):756–759

    Article  Google Scholar 

  • Graf WH, Istiarto I (2002) Flow pattern in the scour hole around a cylinder. J Hydraul Res 40(1):13–20

    Article  Google Scholar 

  • Ismael A, Gunal M, Hussein H (2015) Effect of bridge pier position on scour reduction according to flow direction. Arab J Sci Eng 40(6):1579–1590

    Article  Google Scholar 

  • Izadinia, E., Heidarpour, M. (2012). Simultaneous use of cable and collar to prevent local scouring around bridge pier. "Int J Sediment Res, 27(3): 394–401.

  • Moussa AMA (2017) Evaluation of local scour around bridge piers for various geometrical shapes using mathematical models. Ain Shams Eng J 9(4):2571–2580

    Article  Google Scholar 

  • Masjedi A, Bejestan MS, Kazemi H (2010a) Effects of bridge pier position in a 180 degree flume bend on scour hole depth. J Appl Sci 10(8):670–675

    Article  Google Scholar 

  • Masjedi A, Shafaei BM, Esfandi A (2010b) Experimental study on local scour around single oblong pier fitted with a collar in a 180 degree flume bend. Int J Sediment Res 25(3):304–312

    Article  Google Scholar 

  • Melville BW, Chiew YM (1999) Time scale for local scour at bridge piers. J Hydraulic Eng 125(1):59–65

    Article  Google Scholar 

  • Murtaza G, Hashmi HN, Naeem UA, Khan D, Ahmad N (2018) Effect of bridge pier shape on scour depth at uniform single bridge pier. Mehran Univ Res J Eng Technol 37(3):539–544

    Article  Google Scholar 

  • Naji AM, Ghodsian M, Vaghefi M, Panahpur N (2010) Experimental and numerical simulation of flow in a 90°bend. Flow Measure Instrum 21(3):292–298

    Article  Google Scholar 

  • Neill, C. (1967). Mean-velocity criterion for scour of coarse uniform bed-material. "Paper presented at the 12th Congress of the International Association for Hydraulics Research", Colordo, USA.

  • Oliveto G, Hager W (2002) Temporal evolution of clear-water pier and abutment scour. J Hydraulic Eng 128(9):811–820

    Article  Google Scholar 

  • Rasaei, M., Nazari, S., & Eslamian, S. (2020). Experimental investigation of local scouring around the bridge piers located at a 90° convergent river bend. Sadhana, 45(1).

  • Raudkivi AJ, Ettema R (1983) Clear-water scour at cylindrical piers. J Hydraulic Eng 109(3):338–350

    Article  Google Scholar 

  • Shams M, Ahmadi G, Smith DH (2002) Computational modeling of flow and sediment transport and deposition in meandering rivers. Adv Water Resources 25:689–699

    Article  Google Scholar 

  • Sui J, Afzalimehr H, Samani AK, Maherani M (2010) Clear-water scour around semi-elliptical abutments with armored beds. Int J Sediment Res 25(3):233–245

    Article  Google Scholar 

  • Sui J, Fang D, Karney BW (2009) An experimental study into local scour in a channel caused by a 90° bend. Canad J Civil Eng 33(7):902–911

    Article  Google Scholar 

  • Tang HW, Ding B, Chiew YM, Fang SL (2009) Protection of bridge piers against scouring with tetrahedral frames. Int J Sediment Res 24(4):385–399

    Article  Google Scholar 

  • Uddin MN, Rahman MM (2012) Flow and erosion at a bend in the braided Jamuna River. Int J Sediment Res 27(4):498–509

    Article  Google Scholar 

  • Vaghefi M, Ghodsian M, Salimi S (2016a) Scour formation due to laterally inclined circular pier. Arab J Sci Eng 41(4):1311–1318

    Article  Google Scholar 

  • Vaghefi M, Akbari M, Fiouz AR (2016b) An experimental study of mean and turbulent flow in a 180 degree sharp open channel bend: Secondary flow and bed shear stress. KSCE J Civil Eng 20(4):1582–1593

    Article  Google Scholar 

  • Vaghefi M, Ghodsian M, Salimi S (2016c) The effect of circular bridge piers with different inclination angles toward downstream on scour. Sadhana 41(1):75–86

    Article  Google Scholar 

  • Vaghefi M, Motlagh MJTN, Hashemi, & S. Sh, Moradi, S. (2018) Experimental study of bed topography variations due to placement of a triad series of vertical piers at different positions in a 180° bend. Arab J Geosci 11(5):102

    Article  Google Scholar 

  • Vaghefi M, Akbari M (2019) A procedure for setting up a 180-degree sharp bend flume including construction and examinations with hydraulic structures. Scientia Iranica Trans A Civil Eng 26(6):3165–3180

    Google Scholar 

  • Yang Y, Melville BW, Macky GH, Shamseldin AY (2020) Temporal evolution of clear-water local scour at aligned and skewed complex bridge piers. J Hydraul Eng 146(4):04020026

    Article  Google Scholar 

  • Zarrati A, Nazariha M, Mashahir M (2006) Reduction of local scour in the vicinity of bridge pier groups using collars and riprap. J Hydraul Eng 132(2):154–162

    Article  Google Scholar 

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Authors and Affiliations

  1. Department of Civil Engineering, Persian Gulf University, 7516913817, Bushehr, Iran

    Farid Sedighi & Mohammad Vaghefi

  2. Mechanical and Aeronautical Engineering Department, Clarkson University, 8 Clarkson Ave, Potsdam, NY, 13699, USA

    Goodarz Ahmadi

Authors
  1. Farid Sedighi
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  2. Mohammad Vaghefi
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  3. Goodarz Ahmadi
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Correspondence to Mohammad Vaghefi.

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Sedighi, F., Vaghefi, M. & Ahmadi, G. The Effect of Inclined Pair Piers on Bed Topography: Clear Water, Incipient Motion and Live Bed. Iran J Sci Technol Trans Civ Eng 45, 1871–1890 (2021). https://doi.org/10.1007/s40996-020-00481-y

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