Title: Local Scour Around Bridge Pier in Tidal Current
Abstract:ABSTRACTABSTRACTA big bridge across the Akashi Channel in the Seto Inland Sea where the maximum velocity of tidal current is about 4 m/s is under planning. Two main piers with 40 m X 70 m rectangular ...ABSTRACTABSTRACTA big bridge across the Akashi Channel in the Seto Inland Sea where the maximum velocity of tidal current is about 4 m/s is under planning. Two main piers with 40 m X 70 m rectangular cross section are to be erected on the foundation of sand gravel. And, a serious local scour and its protection around the pier are urgent problems to be solved.In order to predict the scour process in prototype, a similarity of scour between a model and its prototype is examined by introducing a reference time when the maximum scour depth becomes the width of the pier. The characteristics of the reference time are investigated by systematic experiments for various scales of sand diameter, flow velocity and pier width. And, seour depth scale in the case where the scale of sand diameter is distorted from the length scale of the pier is discussed by using a simple assumption.Next, hydraulic model tests to examine the effects of a reverse current and an attack angle are carried out and the characteristics of scour are described. Furthermore, a field test using a steel cylinder with 9 m diameter is done, together with a model test of 1/150 scale, and the similarity of scour phenomenon is discussed on the basis of these results.Read More
Publication Year: 1976
Publication Date: 1976-12-01
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 22
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