Improvement and Verification of Empirical Formula for Local Scour Depth of Piers in Sandy River

CHEN Yi-ming; LI Yi; QU Geng; LUAN Hua-long; YIN Da-cong

doi:10.11988/ckyyb.20211044

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Journal of Changjiang River Scientific Research Institute ›› 2023, Vol. 40 ›› Issue (2) : 14-18. DOI: 10.11988/ckyyb.20211044

RIVER LAKE PROTECTION AND REGULATION

Improvement and Verification of Empirical Formula for Local Scour Depth of Piers in Sandy River

CHEN Yi-ming¹, LI Yi², QU Geng^1,3, LUAN Hua-long^1,3, YIN Da-cong¹

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Abstract

Local scour depth of bridge pier is an important parameter in bridge design. The empirical calculation formula of local scour depth for large-sized piers is prone to generate big errors. In view of this, we established an empirical formula of local scour depth of bridge pier in sandy river under the principle of unified dimension, and further modified the formula considering the influence of abutment exposed on bed surface on the scour. Comparison with Chinese and American calculation specifications verified that the formula proposed in this paper is of higher precision, uniform dimension and comprehensive consideration of factors. It is suitable for calculating local scour depth of large piers.

Key words

pier scour / scour mechanism / local scour depth / empirical formula / formula improvement / near-flow velocity

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CHEN Yi-ming, LI Yi, QU Geng, LUAN Hua-long, YIN Da-cong. Improvement and Verification of Empirical Formula for Local Scour Depth of Piers in Sandy River[J]. Journal of Changjiang River Scientific Research Institute. 2023, 40(2): 14-18 https://doi.org/10.11988/ckyyb.20211044

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