Experimental comparison of scour around square bridge pier with and without submerged vanes
DOI:
https://doi.org/10.24850/j-tyca-2025-05-02Keywords:
Scour, submerged vanes, turbulence, sediment transport, bridge pilesAbstract
This article presents the results of the experimental research on scour around a bridge pier in the presence of submerged vanes and their comparison with the research carried out in the absence of vanes, both having the same boundary conditions. For the study, we used sand with a known and uniform granulometry, placed in a control section of the channel, a square-section concrete pier and submerged vanes made of hard acrylic. The research was developed in the hydrodynamic channel located in the facilities of the Center for Research and Studies in Water Resources of the National Polytechnic School (CIERHI-EPN) and includes: The experimental measurement of the filling of the local scour pier generated around the pier in presence of the vanes; sediment transport; changes generated in the bed topography due to the vortices induced by the vanes; the instantaneous velocity measurement procedure of a turbulent flow downstream of the pier using an Acoustic Doppler Velocimeter (ADV) brand Sontek model FlowTracker 2, and the data processing carried out. Comparison with the results obtained in a previous investigation (without the use of submerged vanes) shows that, using submerged vans reduces the effect of local scour of the piers and generates changes in turbulence characteristics.
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