Research On The Application And Evaluation Of BIM Technology In The Bridge Engineering Cross Magnetic Suspension Track

With the rapid development of the domestic urban economy,traditional flat traffic is difficult to meet the increasingly heavy traffic flow,and the three-dimensional traffic mode of "upward" and "under" emerges as the times require.In the bridge field,there are lots of difficulties such as high security required,many majors involved and complicated construction organization in the bridge engineering cross magnetic suspension track.Domestic research is still blank.In order to ensure the quality and efficiency of the engineering,information management is an important means.As one of the latest science and technology,BIM is applied to the bridge engineering cross magnetic suspension track.Based on parametric model,deepening design,simulation construction and information coordination can not only ensure the quality and safety of the project,but also establish a scientific management system,and accumulate valuable experience.Therefore,the article takes the Changsha Huanghua Airport Linkage Line Reconstruction Project as an example,and conducts the following research on the application and evaluation of BIM technology in the bridge project across the magnetic suspension track :Firstly,based on literature research and theoretical analysis,BIM technology is clearly defined as an information sharing platform with three-dimensional rendering,fast calculation,collision detection and other functions.There are many application evaluation methods for BIM with different application fields,advantages and disadvantages.Based on the actual situation of bridge project across the magnetic suspension track,and analyzing the difficulties such as pipeline revamping,traffic reconciliation and local coordination,determine the network environment and hardware and software of BIM application.After comparison,the AHP,entropy weight method and fuzzy comprehensive evaluation method are combined to "multi-level entropy fuzzy comprehensive evaluation method",which evaluate the application of BIM in the project.Secondly,using BIM technology to construct a three-dimensional model of the bridge project across the magnetic suspension track,which visualize the steel box beam structure division and component details,and deepen the construction drawing from drawing check,engineering quantity comparison and collision inspection.According to the construction process,the paper study the special application ofconstruction site layout,traffic deconstruction and technical disclosure in the preparation stage,the simulation of the pushing,falling beam and hoisting in the construction process,the data archiving and the digital handover in the completion stage.Thirdly,based on the information synergy of BIM technology,form an engineering database of progress,quality,safety and personnel by Luban BE,BV mobile port,two-dimensional code and other means,which can coordinate all kinds of resources in all directions,quickly transfer information and improve management effects.Finally,the BIM application evaluation index system is built according to the principles of science and comprehensiveness,and 15 indicators are selected,which belong to BIM technology layer,organization management layer and social impact layer.The multi-level entropy fuzzy comprehensive evaluation method is used to construct the evaluation model to evaluate the actual project.The results show that the overall application of BIM technology in the bridge project across the magnetic suspension track is significant,with significant effects on organizational management and social impact,and good results at the technical level.