In this study armoring effect on local scouring around bridge pier under steady flow condition was investigated based on model experimentation. Different combinations of bed-armor layers were employed. Three circular piers of 22, 33 and 42 mm were used. Results show that while small bed particles are under the protective effect of armor layer, increasing the total scouring depth, yields an increase in the secondary armor layer depth until the armor layer itself is not influenced by the horseshoe vortices. The minimum stabilized secondary armor layer is identical to the armor grain size. Results showed that there is not meaningful correlation between total scouring depth and B/d (where B is the pier diameter and d is the mean bed grain sizes) for B=33 and 42 mm. However for B=22 mm, increasing B/d tends to increase the total scouring depth. For the armor layer particles size of 2.36 mm the armoring effect for B=22 mm is vanished. The most important parameters in evolution of scouring depth are the armor layer grain size and the armor layer thickness.
Kabiri-Samani, A. (2012). Armoring Effect on Local Scouring around the Bridge Pier under (Part1 :) Steady Flow. Journal of Hydraulics, 6(4), 59-75. doi: 10.30482/jhyd.2012.85409
MLA
Abdorreza Kabiri-Samani. "Armoring Effect on Local Scouring around the Bridge Pier under (Part1 :) Steady Flow". Journal of Hydraulics, 6, 4, 2012, 59-75. doi: 10.30482/jhyd.2012.85409
HARVARD
Kabiri-Samani, A. (2012). 'Armoring Effect on Local Scouring around the Bridge Pier under (Part1 :) Steady Flow', Journal of Hydraulics, 6(4), pp. 59-75. doi: 10.30482/jhyd.2012.85409
VANCOUVER
Kabiri-Samani, A. Armoring Effect on Local Scouring around the Bridge Pier under (Part1 :) Steady Flow. Journal of Hydraulics, 2012; 6(4): 59-75. doi: 10.30482/jhyd.2012.85409