Title: Experimental Study on the Stability of Riprap at Bridge Piers in a 180 Degree Flume Bend
Abstract: Every year, many bridges fail not for structural reasons but due to the scouring at their piers and abutments. One of the most important reasons for this destruction is local scour around the bridge pier in river bend. The use of riprap stones to deal with scour problems is very usual in civil engineering practice. In the present study application of riprap was examined experimentally for scour control around cylindrical bridge pier in a 180-degree laboratory flume bend. Experiments were conducted for four various sizes of riprap with flow discharge of 22, 25, 28 and sec / 31lit .The cylindrical model pier was installed at the positions of 30, 60, 90 and 120-degree with clear-water conditions. The results show that the maximum of riprap stability occurs at 30-degree position, and at least stability occurs at the 60-degree position. As the riprap grain size decreases, the effect of bridge pier position in the river bends on the riprap layer instability declines. Furthermore, the riprap stability around the bridge pier at the river bend was less than the straight channels.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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