小半径曲线转体桥调偏心研究

Research on Eccentricity Adjustment of Small Radius Curved Swivel Bridge

转体桥梁上跨既有繁忙铁路干线的优势突出,具有安全性好、对运输干扰小、不需要复杂的悬臂拼装设备和技术的优点,尤其是在跨越高铁时,已经成为首选的桥梁方案。小半径曲线转体桥横向偏心较大,为确保转体施工安全,需进行精确调偏心设计来平衡桥梁横向扭转力矩。以太原市北中环线工程跨石太客专及石太线立交桥项目为例,通过对工程概况、转体施工流程、调偏心设计等方面的讨论,分析了调偏心方案的对比和计算,得到了合理的小半径转体桥调偏心技术方案,可供类似工程参考借鉴。

The swivel bridges overpassing the existing busy railway lines have the obvious advantages,and have the advantages of good safety,little interference to transport and no need of complex cantilever assembly equipment and technology,and especially spanning the high-speed railway,have become the preferred bridge scheme.The transverse eccentricity of small radius curved swivel bridge is larger.In order to ensure the swivel construction safety,it needs to design the accurate eccentricity adjustment to balance the lateral torsional moment of bridge.Taking Taiyuan North Middle Ring Line Crossing Shijiazhuang-Taiyuan Passenger Dedicated Line and Shijiazhuang-Taiyuan Interchange Project as an example,the article discusses the engineering situation,the swivel construction process and eccentricity adjustment design,and analyzes the comparison and calculation of eccentricity adjustment scheme.The reasonable technical scheme of eccentricity adjustment for small radius curved swivel bridge is achieved,which can be referred for the similar projects.