bratislava-pezinok ii /502道路上rybniČnÁ街道尽头的m 044桥的结构评估

P. Paulík, O. Chernieva
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引用次数: 0

摘要

摘要本文重点介绍了斯洛伐克共和国布拉迪斯拉发-佩济诺克II/502号公路上rybni n街尽头M 044号桥的调查和诊断结果。这篇文章是布拉迪斯拉发斯洛伐克技术大学混凝土结构和桥梁系与敖德萨国立土木工程和建筑学院钢筋混凝土结构和运输设施系在斯洛伐克共和国国家奖学金计划框架内合作的结果。获得的数据用于评估结构和桥梁的整体技术状况。作为检查的结果,确定了框架和上部结构的每个结构单元的破坏类型。对混凝土氯离子污染含量进行了研究,并进行了强度参数的无损检测。对研究结果进行了详细的分析,并提出了处理重建的建议。根据有效规定,由于水平面明显变形,其原因尚不清楚,并且由于承载功能逐渐丧失,我们根据程度评估施工和技术条件:VI -非常糟糕,需要立即重建。桥梁的使用寿命主要受轴承的腐蚀和位移,以及砂盐和腐蚀轴承产生的氯化物污染混凝土的影响。钢筋在5年内的腐蚀会对桥梁的承载能力产生负面影响,并且钢筋覆盖层的碎片掉落在通往桥下的道路上的风险也会增加。强烈建议采取以下行动:更换所有轴承;对桥梁、巷道、排水系统、伸缩缝进行防水改造。4;考虑在支座上安装沥青膨胀缝。一号码头和三号码头。2和3;用高压水清洗整个表面,并涂上一层补救涂层,这将减缓钢筋的腐蚀;用一种修复化合物更新去分层的覆盖层。承载能力的计算结论是基于在诊断期间(08/2021)发现的桥梁当前技术状况。在进一步的操作中,需要注意预应力状态和梁段接触处可能出现的接缝张开。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
STRUCTURAL ASSESSMENT OF THE BRIDGE № M 044 AT THE END OF RYBNIČNÁ STREET ABOVE THE ROAD II/502 BRATISLAVA-PEZINOK
Abstract. The paper is focused on the results of the survey and diagnostics of the bridge № M 044 at the end of Rybničná street above the road II/502 Bratislava-Pezinok in the Slovak Republic. The article is the result of the cooperation between the Department of Concrete Structures and Bridges of the Slovak Technical University in Bratislava and the Department of Reinforced Concrete Structures and Transport Facilities of the Odessa State Academy of Civil Engineering and Architecture within the framework of the National Scholarship Program of the Slovak Republic. Data were obtained to assess the technical condition of the structures and the bridge as a whole. As a result of the inspection, the type of destruction of each structural element of the frame and superstructure was determined. A study on the content of chloride-ionic contamination of concrete and non-destructive tests of strength parameters was carried out. A detailed research analysis of the results and recommendations for processing the reconstruction has been proposed. In accordance with the valid regulations, due to the significant deformation in the horizontal plane, the cause of which is not known and due to the gradual loss of the bearing function, we evaluate the construction, and technical condition by the degree: VI ‒ very bad, and immediate reconstruction is required. The service life of the bridge is mainly affected by corrosion and displacement of the bearings, as well as contamination of concrete with chlorides from sanding salts and corroded bearings. Corrosion of the reinforcement in the horizon of 5 years can negatively affect the load-bearing capacity of the bridge and there is also an increased risk of falling pieces of the covering layer of the reinforcement on the road leading under the bridge. The following actions are strongly recommended: replace all bearings; reconstruct the waterproofing of the bridge, roadway, drainage system, expansion join on support no. 4; consider the installation of asphalt expansion joins over support no. 1 and piers no. 2 and 3; clean the entire surface with high-pressure water and apply a remedial coating, that would slow down the corrosion of the reinforcement; renew the areas with the delaminated cover layer with a repair compound. The conclusions about the calculation of load bearing capacity are based on the current technical condition of the bridge found during diagnostics (08/2021). During further operation, it is necessary to pay attention to the state of prestressing and possible opening of joints at the contact of beam segments.
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