THE EFFECT OF PLUGGING STORM PIPE CULVERT ON HEAD LOSS (I)

Mahmoud Ghonim, Magdy H. Mowafy, Amgad S. El-Ansary, Hamdy A. El-Ghandour

Abstract


Plugging storm pipe culvert changes the flow phenomena causing increasing the total head
losses which sometimes make the flow to flood over and above the road. The experimental study in
this research aims to discuss the effect of the plugging ratio on the total energy head loss. A plugging
ratio,Ar = 50% of the pipe cross section, and a longitudinal plugging length, Lr= 0%, i.e. no plugging
as a reference, 25%, 50%, 75%, and 100%. The pipe culvert was tested for five different discharges
(Q=8.50 to 38.84 lit. /sec) and three submergence ratios (Y2/d = 1.0, 1.5, and 2.0). Dimensional
analysis was employed to get the relationships between the different variables affecting the head loss
through the plugging culvert. The results of the study led to practical recommendations that may be
useful for decision makers to determine the suitable time for maintenance in order to decrease the total
energy head losses and reduce road failure.The reduction percentage of the pipe efficiency decreased
about 5% at Lr= 25% for Y2/d=1.0 and by 14% at Lr= 100% for average pipe Froude number Fp = 0.46
at Y2/d = 2.0.

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