Abstract
The bridges are one of important structures in any country. The failure of bridges occurs due to many factors
including design flaws and manufacturing construction errors. Among all imperfections scouring around the
pier is the most detrimental. So, the estimation of local scouring around a bridge pier is of fundamental
importance for the safe design of bridges. Although numerous researches have been done on local scouring
around a single bridge pier. The present study investigates the effect of angle of inclination of dual bridge pier
configuration on local scouring around bridge piers. Principally rectangular shaped dual bridge piers were
installed in sand bed of laboratory flume at angle of inclination of 0°,7°,12°,15° and 19° with vertical
respectively. Three different flow rates 9, 14 and 18L/sec were considered during each trial. The duration of
each trial was kept around 2 hours. The scour depth was measured separately around both piers with the help
of point gauge under clear water condition. The value of scour depth around upstream pier was larger as
compared to downstream pier because of the lower strength of horseshoe vortices around downstream pier.
From the experimental results, it can be concluded that there is an inverse relationship between the angle of
inclination and scour depth, an increase in the angle of inclination leads to decrease in scour depth around both
piers. The value of scour depth was maximum when piers were at 0° and minimum at 19°. It was also found
that scour depth increases with the increase in flow rate.
Fakhar Muhammad Abbas, Usman Ali Naeem, Usman Ghani, Amina, Talat Farid Ahmad. (2020) Experimental Study of Inclined Bridge Pier Scouring, Mehran University Research Journal of Engineering & Technology, Volume 39, Issue 4.
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