Research On The BIM Architecture Of Railway Infrastructure And Key Techniques Of Geological Modeling

The plan of "transportation power,railway first" puts forward higher requirements for the construction and management of railway infrastructure,traditional railway engineering project management mode is difficult to meet the needs of modern railway construction.Applying BIM technology to integrate engineering information and realize the whole life cycle information management of railway infrastructure is the future development direction of railway construction management.Due to the complexity of railway engineering projects,the development of BIM technology in the railway industry is now in the exploratory stage,the application of technology is separated by specialty and stage,and lacks a unified overall organizational structure.This paper analyzes the essence of railway infrastructure management on the basis of domestic and foreign BIM technology and architecture relevant research and constructs the BIM architecture of railway infrastructure based on EA methodology.Combining the architecture with geological modeling technology,study the process and key technology of building geological BIM model,and developed a modeling management platform to verify the architecture,so as to provide overall architecture and new ideas for the application of BIM technology in railway engineering.The main research contents and results of this paper are as follows:(1)This paper studies the essence of railway infrastructure management,analyzes the current situation and existing problems of railway engineering project management,and proposed the use of BIM technology to realize the whole life cycle information management of railway infrastructure.Based on the DIKW theory,explained the essence of information management and the connotation of BIM technology,the application and collaboration of BIM technology in railway infrastructure are discussed respectively in accordance with each stage of the whole life cycle.(2)Based on EA methodology,combining the characteristics and management requirements of railway infrastructure construction,this paper proposes a railway infrastructure BIM architecture framework for all construction project participants,which takes BIM technology as the core,railway engineering information flow as the driving force,integrates various elements of railway engineering construction and advanced information technology.The overall BIM architecture of railway infrastructure and the specific architecture within the framework are set up by using the hierarchical structure,which serves as the unified basis for the application of railway BIM technology.(3)Analyzed the application of geological models in different stages of the whole life cycle of railway engineering,combining 3D geological modeling technology with railway infrastructure BIM architecture,a modeling method that uses the irregular triangular network DEM and the generalized tri-prism element to establish the IFC boundary representation to represent the solid geological BIM model is proposed.Established a geological BIM modeling process system from geological data processing to geological model construction and application.(4)According to the modeling process system,the key technologies such as railway engineering geological data integration and processing are studied.Combined with the selected modeling methods,the stratum surfaces and geological entities in the modeling process are generated by the algorithm.The platform system is designed based on the railway infrastructure BIM architecture,the secondary development of Civil3D with the B/S structure and Web GL visualization tool are used to build the BIM-based railway engineering geological modeling management platform to realize the integrated management of geological data,geological BIM modeling and visualization sharing functions.