شماره ركورد كنفرانس :
4891
عنوان مقاله :
Investigation of Square Collar application in Reduction of Local Scour around Bridge Piers
Author/Authors :
shariati Hossein Ferdousi Agricultural University of Mashhad , meshkavati toroujeni javad Sari Agricultural Sciences and Natural Resources University , khodashenas saeed reza Water engineering department - Ferdousi Agricultural University of Mashhad , esmaili kazem Water engineering department - Ferdousi Agricultural University of Mashhad
كليدواژه :
Scouring , Bridge pier , Square collar
عنوان كنفرانس :
نهمين كنگره بين المللي مهندسي عمران
چكيده فارسي :
فاقد چكيده فارسي
چكيده لاتين :
Scouring is defined as a natural phenomenon caused by the flow of water in rivers and streams. It is the
consequence of the erosive action of flowing water, which removes and erodes material from the vicinity
of bridge piers. Experiments were carried out in a flume that its length, width and depth were 10, 0.3 and
0.5 meter, respectively. The pier diameter was 25mm and d50 0.8mm. To investigation of the collar
effect used from three different sizes of square collar with 1.5 , 2 ,2.5 D W ( D : pier diameter andW :
width of square collar) that are located in two different heights into the bed surface with 0.4 , 0
D Z . The results showed that installation of 2.5D collar under the bed can reduce scour depth approximately 70%.
This reduction is up to 20% and 40% for 1.5D and 2D collars, respectively.
