Study on 3D Modeling Method for Railway Large Range Complex Geological Regional Environment
Scientific and reasonable planning of railway line location in order to solve the problem of railway geological disasters before they occur has always been a difficult problem in railway location in complex mountainous areas.The pa-per presented an overall three-dimensional modeling method for railway large-scale complex geological environment,based on 3D visual modeling technology based on spatial data.By extracting and processing vectorized information of re-mote sensing geological interpretation maps,and using Lagrange interpolation and cubic Hermite curve interpolation al-gorithms,the paper realized the creation of 3D model of vectorized geological objects driven by data.According to the spatial boundary data and regional boundaries of geological objects,the filling closed area and filling color system were constructed.With DEM model and DOM images as data sources,large-scale 3D terrain scene modeling was realized in Infraworks BIM platform.Based on the seven parameter coordinate system transformation method,with area ratio,spatial distance error andgray state mean as the standards,the image matching degree analysis method and the optimal control point selection strategy were established based on gray histogram.By solving the problem of precise positioning and inte-gration of large-scale vectorized geological model in 3D terrain scene,and by establishing the three-dimensional engi-neering geological model for complete railway engineering areas,this paper realized the 3D visualization of large-scale complex geological environment.The design scheme and the BIM design results of railway lines were positioned and inte-grated on the BIM platform,so that the design effect of the BIM model of the railway line scheme can be seamlessly dis-played in the 3D geological environment.The results show that the constructed ultra-large-scale 3D geological environ-ment model,with good integrity and visibility of geological information and intuitive display of the 3D geological environ-ment of the entire line selection area,can better meet the requirements of railway planning in complex mountainous areas in the pre-feasibility and feasibility study stages.
railway location and designlarge areacomplex geological regional environment3D modelingBIM technology
万方数据
维普
