Local scour around closely placed bridge piers

Malik, Rahul; Setia, Baldev

doi:10.1080/09715010.2018.1559772

Cited by 4 publications

(2 citation statements)

References 6 publications

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“…Numerous laboratory investigations around an isolated model bridge pier have been carried out by a number of investigators to study the mechanism of scour and to calculate the maximum scour depth. Notable contributions include Laursen and Toch [2], Melville [3], Ettema [4], Melville and Sutherland [5], Breusers and Raudkivi [6], Dey et al [7], Hoffman and Verheij [8], Setia [9], Muzzamil and Gangadharaiah [10], Barbhuiya and Dey [11], Gangarudraiah et al [12], Ismail et al [13] and Malik and Setia [14]. However, work and hence established knowledge about scouring around a group of piers is relatively lesser and hence more research is required in this direction.…”

Section: Introduction and Literature Reviewmentioning

confidence: 99%

Interference between pier models and its effects on scour depth

Malik

Setia

2019

SN Appl. Sci.

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Excessive scouring of sediment around bridge piers plays a major role causing failure of waterway structures. To prevent scouring around bridge piers, it is necessary to determine the maximum scour depth. In the past, researchers have conducted extensive laboratory work around flow structures with the help of scaled models. But most of the work has been carried out around an isolated pier and the work around a group of piers is relatively much lesser. To fill up the gaps in information, an experimental study was conducted in a recirculating water flume 15 m long, 0.4 m wide and 0.6 m high containing uniform sediment of mean size, d 50 = 0.30 mm. Experiments on cylindrical pier models of size 42 mm were run at a velocity equal to 0.89 times the critical velocity, u c. Three different arrangements i.e. Tandem, Side by Side and Staggered have been used to analyze the effect of spacing and orientation on scour. From the initial observations it was concluded that, in the case of Tandem arrangement when the spacing between the piers was 16 times the diameter of the pier and more, both the piers showed independent behavior. But if the spacing between the bridge piers is 0D, then both the piers behave like a single pier and the scour depth was found to be 41% greater than that of a single pier. However, when the clear spacing was greater than 1.5 times for side by side and 2.5 times for staggered arrangement, the piers behaved independently.

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Section: Introduction and Literature Reviewmentioning

confidence: 99%

Interference between pier models and its effects on scour depth

Malik

Setia

2019

SN Appl. Sci.

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“…Malik and Baldev (2018) investigated experimentally of effecting of arrangement and spacing of pier groups, it was taken three cases of arrangement for piers, tandem, side by side and staggered arrangement, they concluded for the tandem arrangement, that the scour depth at upstream of front pier is higher than the scour for the second pier and when the spacing between two piers is 16 times (16D) the pier diameter then the pier show independent behavior, in the same meaning behave as single pier [22]. made investigation of interaction of three piers in a tandem arrangement and it was found that the scour depth at upstream of pier was the same in single pier and the important factor of interaction in a tandem arrangement the spacing between piers and compered with interaction of two piers and found that the critical velocities of rear pier were larger than the critical velocities for case of two piers [23].…”

Section: Introductionmentioning

confidence: 99%

Optimum Design for Controlling the Scouring on Bridge Piers

Al-Shukur

Ali

2019

Civ Eng J

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The scouring around bridge pier can be considered the most important reasons of bridge failure. Therefore, we investigated by using physical models of piers and we used single pier with square collar , circular collar and interaction of two piers in laboratory channel, its width 1 m and applied three velocities (0.1, 0.08, and 0.07) m/sec. This experimental investigation was made to choose the optimum shape and location of collar of single pier and comparing it with the interaction of two piers, the results showed that both square and circular collar decrease the scour depth, but the square collar is more effective of reducing scouring and the best location at bed level for single pier, comparing the results of single pier with the interaction of two piers, the interaction of two piers without any countermeasure reduced scour depth about 58%.

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Local scour at complex bridge piers – experimental validation of current prediction methods

Sousa

Ribeiro²

2019

ISH Journal of Hydraulic Engineering

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Local scour around closely placed bridge piers

Cited by 4 publications

References 6 publications

Interference between pier models and its effects on scour depth

Interference between pier models and its effects on scour depth

Optimum Design for Controlling the Scouring on Bridge Piers

Local scour at complex bridge piers – experimental validation of current prediction methods

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