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- Title
Influence of Collar Thickness on the Local Scour Reduction around the Cylindrical Bridge Pier.
- Authors
LIN Zhe-feng; YUAN Tian-gang; LI Jia-chun; QIU Li-fei
- Abstract
Under the long-term effect of the flow load the local scour around the bridge pier foundation is extremely prone to occur. Local scour of bridge pier foundation is one of the important factors of bridge failures, and seriously affects the safety and stability of bridges. Therefore, it is especially important to study the local scour reduction measures for bridge piers. As a classical scour reduction measure, the collar can effectively weaken the local scour around the bridge pier foundation. In order to study the local scour reduction around cylindrical bridge piers affected by the collar thickness, a three-dimensional numerical model of pier-flow-sediment is established based on the numerical simulation software Flow-3D. Then the reliability of the model is verified by the Melville classical experimental data, and the validated model is used to study the effect of the change of collar thickness on the local scour depth of bridge piers and the local scour pit morphology of bridge piers. The results show that the scour reduction effect of the collar on the front and rear of the bridge pier is better than that on both sides of the pier. The increase in collar thickness will aggravate the local scour around the bridge pier, especially on both sides of the pier. Under the selected test conditions, the local scour depth around the bridge pier is the smallest, and the scour reduction effect is the best when the collar thickness is 0.05D (D is the diameter of the bridge pier) . The scour reduction efficiency can reach 54.4% at this time. The research findings serve as a reference for the local scour protection of bridge piers.
- Subjects
MELVILLE, Herman, 1819-1891; PIERS; BRIDGE foundations &; piers; BRIDGE failures; SIMULATION software
- Publication
China Rural Water & Hydropower, 2023, Issue 10, p9
- ISSN
1007-2284
- Publication type
Article
- DOI
10.12396/znsd.230094