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首页> 外文期刊>Journal of bridge engineering >Bridge Scour and Substructure Deterioration: Case Study
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Bridge Scour and Substructure Deterioration: Case Study

机译：桥梁冲刷和下部结构恶化：案例研究

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摘要

In 1988, the State of Mississippi set up its first statewide underwater bridge inspection program. During this inspection, serious damage was found on the substructure of two parallel bridges on I-10 near Biloxi. Significant scour had occurred, exposing the steel piling. These piles had severe corrosion with cross sections reduced by 50%. Because of the reduced cross section, the web and flanges of the piles had buckled locally. This damage was exacerbated by collisions associated with barge traffic on the waterway. This accumulation of problems resulted in a bridge on the verge of collapse. Two alternatives were used to repair the substructure. The more seriously damaged piles were encased in concrete, and the less seriously damaged ones were dewatered and a concrete seal was placed around the piles. After 10 years, the piers with pile encasements showed no additional scour effects. However, the piers with the large concrete seals had scoured by as much as 3 m (10 ft). Described in this paper is the analysis of damage, design of the repair, and a review of the performance of the two types of repair over a 10-year period.
机译：1988年，密西西比州制定了第一个全州水下桥梁检查计划。在检查期间，在比洛克西附近的I-10上的两个平行桥的子结构上发现了严重损坏。发生了明显的冲刷，暴露出钢桩。这些桩的腐蚀严重，横截面减少了50％。由于横截面减小，桩的腹板和翼缘局部弯曲。与航道上的驳船交通相关的碰撞加剧了这种损害。问题的累积导致了濒临崩溃的桥梁。使用了两种替代方法来修复子结构。将受损程度更严重的桩包裹在混凝土中，将受损程度较轻的桩脱水，并在桩周围放置混凝土密封。 10年后，带有桩套的码头没有显示出额外的冲刷效果。但是，带有大型混凝土封条的码头冲刷了3 m（10 ft）。本文介绍的是损坏分析，维修设计以及对两种维修类型在10年内的性能的评估。

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