Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Bridge Abutment Collar as a Scour Countermeasure
To mitigate abutment scour various flat, horizontal, steel collars were attached around a wing-wall abutment ending at the main channel edge under clear-water flow conditions in laboratory experiments. It was found that the collars were able to protect the bridge abutment efficiently by eliminating secondary vortices that ordinarily would cause local scour. The minimum collar dimensions that eliminated local scour were those with a width of 0.23L (L is the abutment width perpendicular to the flow direction) for elimination of local scour, a length of 0.8La for maximum reduction of scour at the edge of the collar, and having the collar located at a vertical location of 0.08ym below the mean bed sediment elevation (ym is the main channel flow depth). In addition, the collar not only reduces scour magnitude near the abutment, but also retards the scour hole development.
Bridge Abutment Collar as a Scour Countermeasure
To mitigate abutment scour various flat, horizontal, steel collars were attached around a wing-wall abutment ending at the main channel edge under clear-water flow conditions in laboratory experiments. It was found that the collars were able to protect the bridge abutment efficiently by eliminating secondary vortices that ordinarily would cause local scour. The minimum collar dimensions that eliminated local scour were those with a width of 0.23L (L is the abutment width perpendicular to the flow direction) for elimination of local scour, a length of 0.8La for maximum reduction of scour at the edge of the collar, and having the collar located at a vertical location of 0.08ym below the mean bed sediment elevation (ym is the main channel flow depth). In addition, the collar not only reduces scour magnitude near the abutment, but also retards the scour hole development.
Bridge Abutment Collar as a Scour Countermeasure
Li, Hua (Autor:in) / Barkdoll, Brian (Autor:in) / Kuhnle, Roger (Autor:in)
World Water and Environmental Resources Congress 2005 ; 2005 ; Anchorage, Alaska, United States
01.07.2005
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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