A smart rotation construction monitoring system for bridges over live railways is presented,which integrates multiple new-generation digital technologies,including digital twin,combination of BIM and GIS,intelligent sensing,internet of things,edge computing,and cloud computing,etc.to achieve the real-time monitoring of the construction process and improve the rotation efficiency and accuracy.The system is able to conduct real-time monitoring of the environmental parameters,rotation parameters,and structural stresses,and simulate the rotation process as well,thus achieving the expected intelligent sensing,analysis and early warning,and visualization throughout the whole rotation construction process of the bridge.With the real-time 3D coordinates of the ends of the cantilever rotated,the formulas to calculate the rotation angle,angular velocity and rotation distance are created,which are considered reflecting the real rotation performance.To address the linkage monitoring of the rotation of two parallel superstructures,formulas to calculate the proper spacing of the left and right superstructures are given.The presented system has been applied in several bridge projects,helping realize the efficient rotation and high-precision positioning of the structures rotated.
关键词
跨线桥/转体施工/云监测平台/信息化技术/智能监测系统/转体参数/双转体桥联动监测/工程应用
Key words
overpass/rotation construction/cloud computing platform/digitalized technology/intelligent monitoring system/rotation parameter/linkage monitoring of rotation of two parallel superstructures/engineering practice
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