某S形连续曲线桥梁侧移病害处治对策研究

The Analysis and Research for the Bridge Diseases of Box Girder's Lateral Displacement, the Case Study of An S-Formed Continuous Curved Box Girder Bridge

针对9×20 m钢筋混凝土S形连续弯箱梁桥在使用过程中梁体发生较大的横向位移以及桥墩(独柱墩)存在倾斜开裂的现象,通过理论分析及跟踪观测,探讨了产生该病害的原因。采取了将4#墩改造成墙式薄壁固结墩、更换支座和5#墩套箍加固等一系列措施,对该桥进行了维修改造,经后续使用和观测,达到了预期加固和处治效果。

Focused on the condition of larger lateral displacement of girder, tilt and crack of pier during the period of using a 9×20 m reinforced concrete S-formed continuous curved box girder bridge. Through the theoretical analysis and tracking observation, discussed the course of the diseases. Adopted the measures of transforming 4# pier into thin wall typed consolidated pier, changing bracing, hooping reinforcement of 5# pier. After the design and construction project of maintenance and reformation, the reformation design is feasible, the expected goal and good effect are achieved.