Research On BIM Collaboration For Metro Engineering Design Process Optimization

The BIM technology,which has been developed rapidly in recent years,is widely regarded as the second revolution of construction industry in the future.At present,the metro engineering circles are actively exploring how to make full use of the advantages of BIM technology,while ensuring the quality of engineering construction and improving the efficiency of engineering design.Due to the complexity of subway engineering,long engineering cycle,large number of participating units,specialties and personnel,and frequent BIM collaborative interaction among specialties,the construction of multi-unit and multi-specialty collaborative BIM collaborative environment has become the key technology for optimization of metro engineering design process.At the same time,BIM model contains a large amount of expert knowledge.How to reuse the existing BIM model in subsequent projects is also an effective means to improve the design efficiency.Based on the metro engineering design process of a Metro Design Institute,the thesis carries out the research on the interaction technology of multi-professional BIM model in the same metro project,and studies the BIM model recommendation method from the perspective of knowledge reuse.Through technical research and system development,it improves the subway engineering design and multi-business collaboration process.The main works include:(1)Research on web-based multi-professional BIM collaboration technology.In order to tackle the problems such as low efficiency of BIM model file sharing,lack of design cooperation among specialties and the inconvenience of browsing BIM model in subway engineering,the thesis realizes the online sharing and interaction of BIM model files based on the file management system Fast DFS and the opensource BIM cloud server BIMServer.According to the local information requirements of specialized subsystems and components in the process of collaborative interaction,the thesis analyzes the file structure of BIM model based on IFC Standard,and designs a BIM sub model extraction algorithm using Redis and Executor Framework,so as to further improve the efficiency of BIM model sharing.(2)Research on BIM model recommendation method based on task features.Aiming at reusing BIM model instances to improve design efficiency,a BIM model hybrid recommendation algorithm based on model feature matching is proposed.Firstly,aiming at the lack of user behavior data in the initial stage of system application,the algorithm uses entropy weight grey correlation model.Then,in order to make full use of users’ interactive data to improve the accuracy of the recommendation algorithm,Light GBM is adopted to predict the adoption probability of candidate model instances.Finally,based on the scale of interactive data set,the two algorithms are combined dynamically to get the final recommendation result.(3)Research and development of metro engineering design collaborative system based on Web.Based on the above technical research,the thesis has completed the development of metro engineering design collaboration system.The system includes project management,project task multi-level planning management,professional design task management,BIM model instance recommendation,BIM model online interaction and other functions.The system has been applied in a Metro Design Institute in Guangzhou Province,and it can meet its business application needs through application verification.