Countermeasures to Protect Bridge Abutments from Scour (2007) / Chapter Skim
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Pages 208-211
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208 From the literature review and laboratory studies, several key points emerge. The following sections summarize the conclusions for countermeasures involving wing-wall abutments, spill-through abutments, and flow guidance.
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• The apron should have a perimeter toe whose lower level approximately coincides with the average elevation of dunes moving through the channel in the vicinity of the bridge. • The geobags should be placed in a shingled manner, whereby adjoining geobags overlie joints between underlying geobags.
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• The average velocity in the channel was well predicted by the two-dimensional model. One unusual velocity observation in the particle-tracking velocimetry (PTV)
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From page 211... ...
the abutment. The foot of the wall should not protrude into the main channel beyond the abutment, and a top wall length of 0.5L will provide sufficient protection.
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