Experimental study of local scour around inclined bridge pier groups based on capped piles in presence of debris accumulation

Zare Ganjaroodi, Ahmad; Masoudian, Mohsen; Esmaeili Varaki, Mahdi

doi:10.22092/idser.2018.122306.1333

Document Type : Original Article

Authors

¹ PhD Student of Dept. of water Engineering, University of agricultural and natural resource science of Sari

² Associate Professor of Dept. of water Engineering, University of agricultural and natural resource science of sari

³ department of water Engineering, University of Guilan

https://doi.org/10.22092/idser.2018.122306.1333

Abstract

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 consist of two rectangular piers with 2.5 and 3.5 cm dimensions which mounted 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 conditions. Comparison of results proved that the effect of increasing flow depth has no significant effect on maximum scour depth. Results that in presence of the debris for pile cap relative level Z/Tpc=0, the maximum scour depth increases about 8.5% in comparison with no debris. For pile cap relative level Z/Tpc=1 presence of the debris increases 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 causes an increase in the maximum scour depth about 4% in comparison with no debris

Keywords

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Irrigation and Drainage Structures Engineering Research

Experimental study of local scour around inclined bridge pier groups based on capped piles in presence of debris accumulation

References

References

Volume 20, Issue 76 - Serial Number 76
October 2019
Pages 57-76

Experimental study of local scour around inclined bridge pier groups based on capped piles in presence of debris accumulation

References

References

Volume 20, Issue 76 - Serial Number 76October 2019Pages 57-76

Volume 20, Issue 76 - Serial Number 76
October 2019
Pages 57-76