Design Of Monitoring Scheme And Research On Monitoring Management For Swivel Construction Of High-speed Railway Bridge Based On BIM

With the development of the times,researches on big data and digitization have been carried out in various industries.The development and application of BIM have been vigorously promoted in bridge industry.With the completion of many high-speed railway lines,in order to alleviate traffic pressure,many bridges need to be constructed by turning over the high-speed railway.According to the characteristics of bridge construction across high-speed railway,combined with BIM technology,the construction monitoring scheme design and monitoring research are carried out for this type of bridge.According to the content of monitoring work and the characteristics of cross-high-speed rail construction,a cross-high-speed rail swivel construction monitoring system was established.Based on the engineering background of the 268 m span high-speed rail swivel construction steel truss girder bridge,part of the content of the monitoring system was studied around its composition.Firstly,the monitoring calculation was carried out on the swivel bridge:the whole bridge model calculation in the design checking calculation,the swivel bridge model calculation in the monitoring prediction calculation and local calculation of pier supporting feet in key swivel structures.According to the calculation results,the stress and deformation of the steel truss and pier foot were monitored and analyzed.In order to design a bridge rotation monitoring scheme,the stress and deformation technologies commonly used in bridge monitoring were studied and analyzed.Revit models of six representative monitoring sensors were established.The idea of building a monitoring sensor family library was put forward to facilitate direct use in other projects.Then according to the monitoring elements,and based on the characteristics of 3D visualization of BIM technology,a bridge swivel monitoring scheme was designed forward.To achieve the global arrangement of monitoring points and the installation arrangement of monitoring sensors,the monitoring points for bridge stress,displacement,environmental factors and other types were arranged.Combined with the demand for high-speed rail monitoring when the bridge is turned,and taking advantage of BIM’s collaborative operation function,a comprehensive information model of bridge-high-speed railway was proposed.According to the background that the bridge is rotated during the skylight period of high-speed railway,the bridge swivel balance control system was designed.The system realizes the balance of the cantilever end of the bridge by adjusting the water quantity in the cantilever end water tank,and has the characteristics of easy installation and removal,reusable hardware facilities and applicability to other projects.Taking background engineering as an example,the swivel balance control system was applied.Finally,based on Web and digital twin technology,the bridge swivel monitoring management research was carried out.The bridge swivel monitoring platform was built by using the B/S frame,and information such as animation,BIM model,pictures and monitoring data were integrated into the same interface.The digital twin technology was used to establish a five-dimensional model for the monitoring and management of the swivel bridge,and a digital twin system architecture based on the monitoring and management of the swivel bridge construction were built.Combined with background project,the feasibility of digital twin system operation was explained,which realized intelligent and automatic management of bridge swivel monitoring and control.