Research notes : identification of scour critical bridges using geophysical techniques.
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Alternative Title:Identification of scour critical bridges using geophysical techniques.
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Abstract:Three geophysical methods were used to examine 14 bridge sites in Oregon, to determine the usefulness of each method in locating and determining depth of infilled scour holes around bridge piers in Oregon streams. Each geophysical method was capable of detecting infilling around piers,but because of equipment limitations, not every method was effective at each site. The softer infilled material present at nearly all sites was probed by a metal rod to verity data collected by the geophysical equipment. Scour equations were marginally successful in predicting two existing scour holes that were identified as having been caused by a peak flow. Most study sites had local conditions, such as riprap, debris, or remnants of old coffer dams that invalidated the use of equations.
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