Experimental Study of Local Scour around Inclined Bridge Pier Groups Based on Capped Piles in Presence of Debris Accumulation

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Zare Ganjaroodi A.; MASOUDIAN M.; ESMAEILI VARAKI M.

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Journal: Irrigation and Drainage Structures Engineering Research Year:2019 | Volume:20 | Issue:76 Page(s): 57-76

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Title

Experimental Study of Local Scour around Inclined Bridge Pier Groups Based on Capped Piles in Presence of Debris Accumulation

Author(s)

Zare Ganjaroodi A. | MASOUDIAN M. | ESMAEILI VARAKI M. | Issue Writer Certificate

Keywords

Diameter PilesQ1

Pile ArrangementQ1

Pile Cap LevelQ1

Pile Cape ThicknessQ1

Abstract

Rivers during floods carry branches, leaves and trunks of trees that their accumulation in front of bridges, change the flow pattern and accelerate the scouring process around bridge piers by blocking the entire or part of the bridge span. In this case, intensification in scour depth and development of scour hole beneath lead collapsing the bridges with shallow foundation. In this paper, the effects of debris dimensions, Pile Cape Thickness and installation levels, array and Diameter Piles on the maximum scour depth around inclined bridge pier groups were investigated experimentally. The bridge pier, consisting of two rectangular piers were used with 2. 5 and 3. 5 cm dimensions mounting at an angle of 28 degrees on a pile cap with 10 cm width, 16 cm length, 3 and 5cm thickness which placed on an array of 2×2 and 2×3 piles with different diameters. The experiments were performed for relative flow depth (y/D) 6. 42, 7. 85, relative Pile Cap Levels (Z/Tpc) 0, 1, 1. 5, relative debris width and 2. 85 and length 2, the relative thickness 0. 85 and 1. 42, in clear water condition. Comparison of results proved that the increasing flow depth had no significant effect on maximum scour depth. Results also showed that in presence of the debris for pile cap relative level Z/Tpc=0, the maximum scour depth increased about 8. 5%, comparing with no debris. For pile cap relative level Z/Tpc=1, presence of the debris increased the maximum scour depth up to 4. 5% compared to no debris. By increasing the pile cap relative level to 1. 5, presence of the debris caused an increase in the maximum scour depth about 4%, comparing with no debris.

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APA: Copy

Zare Ganjaroodi, A., MASOUDIAN, M., & ESMAEILI VARAKI, M.. (2019). Experimental Study of Local Scour around Inclined Bridge Pier Groups Based on Capped Piles in Presence of Debris Accumulation. IRRIGATION AND DRAINAGE STRUCTURES ENGINEERING RESEARCH , 20(76 ), 57-76. SID. https://sid.ir/paper/368780/en

Vancouver: Copy

Zare Ganjaroodi A., MASOUDIAN M., ESMAEILI VARAKI M.. Experimental Study of Local Scour around Inclined Bridge Pier Groups Based on Capped Piles in Presence of Debris Accumulation. IRRIGATION AND DRAINAGE STRUCTURES ENGINEERING RESEARCH [Internet]. 2019;20(76 ):57-76. Available from: https://sid.ir/paper/368780/en

IEEE: Copy

A. Zare Ganjaroodi, M. MASOUDIAN, and M. ESMAEILI VARAKI, “Experimental Study of Local Scour around Inclined Bridge Pier Groups Based on Capped Piles in Presence of Debris Accumulation,” IRRIGATION AND DRAINAGE STRUCTURES ENGINEERING RESEARCH , vol. 20, no. 76 , pp. 57–76, 2019, [Online]. Available: https://sid.ir/paper/368780/en

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