Research On The Layout Of Subway Station Entrances And Exits Based On BIM And VR

The layout planning of subway station entrances and exits is a key part of subway construction.This thesis focuses on the application of modern three-dimensional visualization technology in the layout planning of subway station entrances and exits,taking the entrances and exits of subway stations as the research object and addressing the current problems of unintuitive and low efficiency of traditional two-dimensional planning methods.Based on BIM(Building Information Modeling)and UC win/Road software,we construct a virtual city 3D scene with complete information,and use 3D visualization technology to reflect the station location,height and setting form,the road network layout around the station,and the passenger flow simulation scene more realistically.Simulation of passenger flow behavior and urban rainfall caused by flooding and extreme weather metro station entrance and exit layout planning is also carried out to achieve an immersive experience in the planning and design stage,and a practical case study of Shijiazhuang Beiguo Mall metro station entrance and exit is conducted.The main research contents of the thesis are as follows:(1)Research on 3D city scene modeling method of subway station entrances.Research on the principle of subway station entrance and exit arrangement and the method of generating large-scale 3D scenes based on UC win/Road;use the actual DEM(Digital Elevation Model)to import UC win/Road for specific urban terrain simulation,establish an intuitive and smooth 3D design environment,and analyze the various urban scenes of intersection,Based on the analysis of intersections,lanes and viaduct structures and characteristics in various urban scenes,the road 3D model construction was realized.(2)Established a 3D model library for subway station entrances and exits,solved the key problem of non-destructive model attribute material transfer based on Revit API(Application Programming Interface)secondary development technology,realized the integration of BIM and UC win/Road under large-scale urban scenes,microscopic model The integration method has built a virtual model environment with rich semantic information and strong sense of immersion.(3)Research on entrance layout method based on rainfall inundation simulation.The complex boundary conditions in the area where the entrances and exits of urban metro stations are located are analyzed to provide theoretical support and model basis for predicting the water accumulation in the area where the entrances and exits of metro stations are located.Combining with the principles and methods of subway entrance and exit setting,the form of subway entrance and exit,and considering the regional climate and environmental factors of the subway,the layout of subway station entrances and exits is quantified and evaluated from multiple angles.(4)Expansion and implementation of UC win/Road virtual interaction function.Analyze the method of combining UC win/Road simulation platform with other simulation platforms to realize the simulation of passenger flow organization and rainfall.On the basis of facility layout and environment perfection,passenger flow organization scheme design is carried out,pedestrian movement simulation in the virtual environment is carried out and experimental data is collected;rainfall is designed using xpswmm,combined with drainage network data,and UC win/Road multi-directional virtual interaction function is realized based on plug-in interface.Simulate and deepen the discussion on the actual metro station entrance layout situation.