Effect of Bridge Pier Shape on Scour Depth at Uniform Single Bridge Pier

  • Ghulam Murtaza Department of Civil Engineering, University of Engineering and Technology, Taxila.
  • Hashim Nisar Hashmi Department of Civil Engineering, University of Engineering and Technology, Taxila.
  • Usman Ali Naeem Department of Civil Engineering, University of Engineering and Technology, Taxila.
  • Daulat Khan Department of Agriculture Engineering, University of Engineering and Technology, Peshawar
  • Naveed Ahmad Department of Civil Engineering, University of Engineering and Technology, Taxila

Abstract

Bridge pier scouring may lead to the bridge failure and the shape of bridge pier itself is one of the main factor to control scouring around bridge pier. The amount of sediment which is removed from the boundary of bridge pier is called bridge pier scouring and the depth up to which sediment removed is called scour depth. Scouring results, the exposure of foundation, eventually leading to bridge failures. Assessment of the maximum scour that can be faced by pier has a vital role in the design of bridge foundation. Different techniques are used to minimize the scouring effect in order to control the bridge failure. In this study effect of bridge pier shape on scouring was checked on four different shape i.e. circular, oval, square and octagonal. Each pier shape was tested against three different values of flows i.e. 16, 22.50 and 29.50 liter/sec. Uniform bed material of standard deviation (g = 1.21) and median size (D50 = 0.28 mm) was used for all tests. Scour is measured with the help of point of gauge and bed is levelled before every experiment. Experimental results show that minimum scour is observed for octagonal bridge pier and maximum for square bridge pier while circular and oval faced intermediate scour depth relative to square and octagonal bridge pier. It is concluded that scour has reduced to 22% when octagonal pier was used compared to circular one.

Published
Jul 1, 2018
How to Cite
MURTAZA, Ghulam et al. Effect of Bridge Pier Shape on Scour Depth at Uniform Single Bridge Pier. Mehran University Research Journal of Engineering and Technology, [S.l.], v. 37, n. 3, p. 539-544, july 2018. ISSN 2413-7219. Available at: <http://publications.muet.edu.pk/index.php/muetrj/article/view/500>. Date accessed: 25 sep. 2018. doi: http://dx.doi.org/10.22581/muet1982.1803.08.
Section
Articles
This is an open Access Article published by Mehran University of Engineering and Technolgy, Jamshoro under CCBY 4.0 International License