大吨位双向不对称跨铁路匝道桥转体施工技术

Rotation Construction Technology of Large-tonnage Bidirectional Asymmetric Cross-railway Ramp Bridges

以广州某跨铁路匝道桥为工程背景,利用理论分析和试验测试等手段,探讨了平面转体+球铰系统在桥梁转体施工中的高效应用方法。该桥作为华南地区首座在岩溶地质条件下进行的三维非对称曲线转体桥,其转体重量及角度均达到施工难度的新纪录。工程实践表明,该桥在预定时间内成功完成了转体施工,并达到了严格的施工质量要求,验证了平面转体+球铰系统在类似桥梁转体施工中的可行性,说明平面转体+球铰系统具有显著的施工效率和质量优势,可为日后同类桥梁的转体施工提供宝贵的经验和参考。

The efficient application methods of the planar rotation+spherical joint system in bridge rotation construction are explored in this study,using theoretical analysis and experimental testing,with a specific focus on a viaduct bridge over a railway in Guangzhou as the engineering background.As the first three-dimensional asymmetric curved swivel bridge under karst geological conditions in South China,the bridge's rotating weight and angle have reached a new record of construction difficulty.The engineering practice shows that the bridge has successfully completed the swivel construction within the scheduled time and met the strict construction quality requirements,which verifies the feasibility of the planar rotation and ball-hinge system in the rotation construction of similar bridges,and indicates that the planar rota‐tion and ball-hinge system has significant construction efficiency and quality advantages.This method can serve as a reference for the rota‐tion construction of similar rotating bridges in the future.