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桥隧不仅是铁路工务设备中永久性的大型结构物,也是铁路行车设施的重要组成部分和确保铁路运输安全的关键设备之一。结合铁路钢筋混凝土桥隧单板受力的实际工作状态以MPC复合材料厚度为参数,分别建立了有限元模型,理论分析得到了MPC复合材料厚度与荷载横向分布之间的变化规律。然后,通过依托工程加固前荷载试验,提出了不中断铁路运输条件下利用MPC复合材料加固改善桥梁荷载横向分布,提高桥梁整体刚度的设计与施工技术方案,并通过加固后荷载试验验证了加固设计方法的可靠性。
The bridge tunnel is not only a permanent large-scale structure of railway public works equipment, but also an important part of the railway traffic facilities and one of the key equipment to ensure the safety of railway transportation. Based on the actual working state of the veneer of railway reinforced concrete bridge and tunnel, the finite element model was set up based on the MPC composite thickness, and the variation law between the thickness of MPC composite and the lateral load distribution was obtained theoretically. Then, by relying on the pre-reinforcement load test, the design and construction technology scheme of improving the lateral load distribution and improving the overall rigidity of the bridge by using MPC composite materials without any interruption of railway transportation is proposed. The reinforcement design The reliability of the method.