عنوان مجله
|
Journal of Hydraulic Structures
|
چکیده
|
As a destructive process, scouring exposes bridge foundations to failure and disastrous
consequences. Control structures of various arrangements are capable to change and manage the
adverse effects. The present work aims to probe the response of submerged vanes of a quasitriangular arrangement (of heights 0, 4, and 6 cm), eppi, and sills (of height 4.5 and 9 cm) on
scour development. All tests were executed in a rectangular slope-less flume covered with
sediments of D50=1.8 mm. Temporal and equilibrium scour depth were mapped for Froude
numbers: 0.15, 0.2, 0.25, and 0.6. Results clarified the aggregate effect of the eppies on the scour
depth due to section contraction. Submerged vanes and sill were set up to deteriorate sediment
transport. Although the vane of height 4 cm had the most superior performance, but the sill
installation of height 4.5 cm greatly increased vane's effect, so that a remarkable reduction of
scour was occurred at the first pier foundation.
|