Skip to content
Research Article Open access CC BY 4.0

The Study of Rate of Scour at Cylindrical, Square and Round Nosed Piers

Livingstone Swilla, Shija Kazumba

Journal of Scientific Research and Reports · pp. 1–7 · Published 12 May 2017

10.9734/JSRR/2017/33019

Abstract

Rate of scour adjacent to piled foundations may result in rapidly loss of skin friction and load bearing capacity of the piles. The piles may be subjected to unplanned bending stresses, from lateral loads and hydrodynamic forces. The knowledge related to the time taken by different piers to achieve a certain scour depth is limited. In this study experiments were conducted using wooden pier models in the re-circulating glass sided tilting flume of 12,5 m length, 300 mm width and 450 mm deep. In all three tests water depth, discharge, and mean approach flow velocity in the channel were kept constant. The flume was filled with cohessionless bed material (artificial sand) average grain diameter of 0.203 mm to a uniform thickness. The scour depths observed from experiments were 30 mm, 16 mm and 14 mm in square, cylindrical and round nosed piers respectively. It was observed that, it takes more time for the cylindrical and round nosed piers to achieve scour depth of 22.2 mm and 20 mm respectively as estimated by Breusers and Raudkivi 1991. The results also showed that: it takes shorter time for a square nosed pier to achieve its empirical scour depth value of 26.7 mm. This indicates that the rate of scour depth development in square nosed pier is higher than that of the cylindrical and round nosed piers at a given time.

Pier models approach flow velocity local scour maximum scour depth artificial sand.

References (8)

  1. 1 Principles of sediment transport in rivers, estuaries and coastal seas
  2. 2 Scour Around Bridge Piers and Abutments
  3. 3 Study of the time-dependent clear water scour around circular bridge piers [DOI]
  4. 4 Experimental and theoretical investigations of scour at bridge abutment [DOI]
  5. 5 Study of sediment motion in scour hole of a circular pier [DOI]
  6. 6 Scour in hydraulic engineering [DOI]
  7. 7 Local scour around large obstructions
  8. 8 Experimental study of scour around circular and elongated bridge piers with and without pier slot

Cited by 0

No indexed citations yet.

Article metrics

Real usage data collected on this platform.

7

Page views

0

PDF downloads

0

Outbound clicks

0

Citations

Views over time

Views by country

Approximate, from request IP at view time — not citizenship or institution. Countries with fewer than 5 views are grouped as "Other".

Traffic sources

Referring site, by host.

Views and downloads exclude known bots/crawlers. Citations combines this platform's own DOI-resolved index with each external source's own reported total — see Cited by above for individually listed citing works. Last refreshed 0 seconds ago.