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

Bridge pier scouring may lead to the bridge failure and the shape of the bridge pier itself is one of the main factors to control scouring around the bridge pier. The amount of sediment which is removed from the boundary of the bridge pier is called bridge pier scouring and the depth up to which sediment is removed is called scour depth. Scouring results, the exposure of foundation, eventually lead to bridge failures. Assessment of the maximum scour that can be faced by the pier has a vital role in the design of the bridge foundation. Different techniques are used to minimize the scouring effect in order to control the bridge failure. In this study the effect of bridge pier shape on scouring was checked on four different shapes, 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 l/sec. Uniform bed material of standard deviation (σ sub 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 an octagonal bridge pier and maximum for a 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 an octagonal pier was used compared to a circular one.

• Record URL:
  https://doi.org/10.22581/muet1982.1803.08
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02547821
• Supplemental Notes:
  • ©2018 Mehran University Research Journal of Engineering & Technology.
• Authors:
  • Murtaza, Ghulam
  • Hashmi, Hashim Nisar
  • Naeem, Usman Ali
  • Khan, Daulat
  • Ahmad, Naveed
• Publication Date: 2018-7

Language

• English

Media Info

• Media Type: Digital/other
• Features: Figures; Photos; References; Tables;
• Pagination: pp 539-544
• Serial:
  • Mehran University Research Journal of Engineering & Technology
  • Volume: 37
  • Issue Number: 3
  • Publisher: Mehran University of Engineering and Technology
  • ISSN: 0254-7821
  • EISSN: 2413-7219
  • Serial URL: https://publications.muet.edu.pk/index.php/muetrj/index
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Bridge foundations; Bridge piers; Depth; Design; Scour; Shape
• Subject Areas: Bridges and other structures; Design; Highways; Hydraulics and Hydrology;

Filing Info

• Accession Number: 01674968
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 11 2018 5:13PM