沪通长江大桥非通航孔桥112m简支钢桁梁制造激光跟踪测量技术

Application of Laser Tracking Measurement Technique to 112m Simply-Supported Steel Truss Girder Manufacture for Non-navigational Channel Bridge of Hutong Changjiang River Bridge

沪通长江大桥钢桁梁构件结构尺寸大,种类多,整体节点处连接关系复杂,制造尺寸精度将直接影响桥位顺利安装及成桥线形。通过应用API激光跟踪测量技术,对钢桁梁制造关键工序的尺寸精度进行动态跟踪测量,并进行制造误差管理。应用后处理SA软件逆向建模技术创建实测数据模型,通过与理论模型进行对齐操作,检查线形拟合程度。钢桁梁成品杆件检测结果显示100%合格。API激光跟踪测量技术确保了钢桁梁构件的制造精度满足设计要求,并降低了测量复杂程度,提高了测量精度和生产效率。

The steel truss girder of Hutong Changjiang River Bridge consists of components with large dimensions,these components have different structural forms and the connecting relations at the integral panel points are very complicated.The manufacturing accuracy of the components will exert direct influence on the successful installation of the components at the bridge site and the alignment of the structure in the complete bridge state.The API laser tracking measurement technique was used to conduct dynamic tracking measurement of the dimension accuracy of the key procedure in the steel truss girder manufacture and to manage the manufacture errors.A kind of reverse modeling technique was used to establish the numerical model with measured data with the post processing SA software,and to inspect the linear fitting degree by comparing the model containing measured data with the theoretical model.The inspection of the finished members of the steel truss girder showed that 100%of the members were qualified.The application of API laser tracking measurement technique can ensure that the manufacturing accuracy of the components of the steel truss girder meet the design requirements,reduce the complexity of the measurement and improve the inspection accuracy and manufacturing efficiency.