Research Article
Efficacy of the Combined Use of Bed Sill and Sacrificial Piles to Control Local Scour around Circular Bridge Piers
Table 4
Details of various combinations from the group of bed sill and sacrificial piles with geometric parameters and efficiency.
| Test | Combined countermeasures | Geometric parameters of sacrificial piles | (cm) | (%) | Arrangement of piles | | | X/D | α |
| C1 | — | — | — | — | — | — | 9 | — | C2 | Bed sill | — | — | — | — | — | 7.4 | 17.8 | C3 | Sacrificial piles | Transverse | 3 | 0.5 | 2 | — | 6.8 | 24.4 | C4 | Sacrificial piles | Transverse | 5 | 0.83 | 2 | — | 7.55 | 16.1 | C5 | Bed sill and sacrificial piles | Transverse | 3 | 0.5 | 2 | — | 5.4 | 40 | C6 | Bed sill and sacrificial piles | Transverse | 5 | 0.83 | 2 | — | 6.15 | 31.7 | C7 | Sacrificial piles | Triangular | 3 | 0.5 | 2.5 | 30° | 5.65 | 37.2 | C8 | Sacrificial piles | Triangular | 5 | 0.83 | 2.5 | 30° | 5.8 | 35.6 | C9 | Bed sill and sacrificial piles | Triangular | 3 | 0.5 | 2.5 | 30° | 4.4 | 51.1 | C10 | Bed sill and sacrificial piles | Triangular | 5 | 0.83 | 2.5 | 30° | 4.7 | 47.8 | C11 | Sacrificial piles | Triangular | 3 | 0.5 | 2.5 | 60° | 7 | 22.2 | C12 | Sacrificial piles | Triangular | 5 | 0.83 | 2.5 | 60° | 7.5 | 16.7 | C13 | Bed sill and sacrificial piles | Triangular | 3 | 0.5 | 2.5 | 60° | 5.7 | 36.7 | C14 | Bed sill and sacrificial piles | Triangular | 5 | 0.83 | 2.5 | 60° | 6.35 | 29.4 |
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