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小半径独墩式混凝土曲线连续箱形梁桥力学特征比起直桥复杂很多,引起整个梁体侧向偏移等病害的原因并不单一,由多种原因组合影响。该文应用Midas/Civil软件对此类桥型进行有限元模拟,通过敏感性分析,比较造成侧向偏移各因素影响的程度。模拟后分析数据得出,该桥型梁体侧向偏移病害的主要影响因素为车辆荷载偏载作用,其次为系统温差累积影响;针对该桥病害提出合理的纠偏加固设计,保证方案合理可行后,进行纠偏加固施工。纠偏加固过程中,采用PLC液压千斤顶同步顶推技术,能够准确高效地进行加固施工。工程竣工后,发现采用独柱墩增设钢悬臂的方案,可以有效消除该桥的梁体侧向偏移问题。
Compared with the straight bridge, the mechanical characteristics of the continuous curved box girder bridge with small radius monopulled concrete curve are much more complicated. The reasons causing the lateral deflection of the whole beam body are not simple, and are influenced by many reasons. In this paper, the Midas / Civil software is used to simulate this type of bridge. Through the sensitivity analysis, the influence of each factor of lateral offset is compared. The simulation analysis data show that the main influencing factors of the lateral displacement of the bridge beam are the load partial load of the vehicle, followed by the cumulative effect of the temperature difference of the system. A reasonable correction and reinforcement design for the disease of the bridge is proposed to ensure that the scheme is reasonable and feasible After rectification and reinforcement construction. Deviation correction and reinforcement process, the use of PLC hydraulic jack push synchronization technology to be able to accurately and efficiently reinforcement construction. After the completion of the project, it was found that the proposal of adding a steel cantilever with a single pillar pier can effectively eliminate the lateral displacement of the beam of the bridge.