Effect of Mutual Interference of Bridge Piers on Scouring in Meandering Channel

Authors

  • Mohammad Athar Civil Engineering Department, A.M.U, Aligarh, U.P., India
  • Shamsul Azam M. Tech. A.M.U, Aligarh, U.P., India
  • Humaira Athar Innovative Building Materials Division, CSIR-Central Building Research Institute, Roorkee, Uttarakhand, India

DOI:

https://doi.org/10.30564/hsme.v4i2.4692

Abstract

Local scour is the reduction of original bed level around any hydraulic structure. Bridge failure due to scouring has made researchers study the cause of scouring and predict the scour depth and pattern around bridge piers and foundations. Several investigators have extensively studied local scour around isolated bridge pier, but modern designs of the bridges comprise of wide span and thus group of piers rather than a single pier. The flow and scour pattern around group of piers are different from the case of a single pier due to the interaction effect. The objective of present study is to investigate the effect of mutual interference of bridge piers on local scour experimentally around two piers in non-cohesive bed. Experiments were carried out on model bridge piers of circular cross section in a meandering channel. It was observed that when front and rear piers were placed at an angular displacement of θ = 40° and 80° respectively, maximum depth of scour is maximum. Here θ is the angle the line drawn at the inlet of bend to the line joining the centre of curvature and any point on the outer portion of the bend.

Keywords:

Local scour; Bridge piers; Scour depth; Meandering channel; Angular displacement

References

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Issue

Vol. 4 , Iss. 2 (October 2022)

Article Type

Special Issue: Critical studies of scour and sediment transport

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