Laboratory investigation on the effect of depth-placed riprap on its stability for protection of Spur Dike in 90° Bend in order to using in navigable Rivers and Gulfs
One of the applications of spur dikes is to ensure navigability of rivers through the regulation and stabilization of sufficient width and depth, balance changes for the development of depth and the radius of curvature. Nowadays, spurs are also employed to promote environmental conditions along riverbanks. One of the important and less appreciated issues pertaining to spurs is the protection they provide against scouring. A simple and economic way spurs provide protection against scouring is the use of ripraps. Ripraps are very commonly used because they are convenient, cheap and simple to construct. .This study focused on the effect of riprap implementation depth on their stability in protecting spur dikes in bends. To achieve the research objectives, special ripraps with a diameter of 1Cm were placed in 3 depths (Y/D_50=0,2,4), and used for 3 spur lengths (15%,20% and 25% flume width ), in two angles (90 and 120 degree) and three longitudinal distances (3,5 and 7 times of the spur length). The results of this study indicate that in all the experimented cases, the application of depth-placed ripraps increases the riprap’s stability. Thus, the stability of ripraps increased with an increase in depth-placed ripraps and the angle of the spurs, whereas an increase in spur length and longitudinal distance decreased the stability of the ripraps.
| Main Authors: | , , |
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| Format: | Journal Contribution biblioteca |
| Language: | Persian |
| Published: |
2016
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| Subjects: | Spur dike, Riprap stability, Bend, Costal stability, Navigation, Investigation, Depth, |
| Online Access: | http://hdl.handle.net/1834/13508 |
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