The Effect of Collar on Bridge Scour Reduction
| Autor: | Shih-Fan Chen, 程仕帆 |
|---|---|
| Rok vydání: | 2003 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 91 This study uses experimental mobile channel to examine the characteristics of local scour around uniform piers with collar protection. The maximum scour depth and the range of the scour hole is analyzed. Furthermore, the change of scour at different exposure elevation is compared by performing a series of case studies. No matter what kinds of the collar shape is,the maximum scour depth is decreased with the position of the collar set close to the bed.The importance of the collar shape chosen is according to the best benefit of redusing scour depth and the range of the scour hole. Setting the collar which it’s top is flush with the bed would lead the vortex system rise away from the bed,and it can not only reduce the depth of the scour hole,but lead the maximum depth of the scour hole away from the main structure.The downflow and horseshoe vortex is guided to the downstream successfully far away from the bridge pier structure.It can be accepted that the circular collar is the best choice of the pridge foundation protection. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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