Exploration on 3D Geological Modeling Technology Based on BIM Secondary Development—Taking Liangshuijing Tunnel as an Example

Although the existing 3D geological software has great advantages in spatial geographical analysis, it still has some weaknesses such as complex modeling program. On this basis, 3D geological modeling technology was explored herein. Firstly, the representation method of 3D geological model and the data processing method of geological modeling are discussed; secondly, aiming at the problems of low modeling accuracy and little information data, Delaunay Triangulation Algorithm is applied to establish the correlation between 3D geological model and data; the theoretical basis and application skills for supplementing the measurement data by Kriging Interpolation Method are explored; finally, by using Dynamo visual programming plug-in, the topographic curved surface, unstratified 3D geological entity and the stratified 3D geological entity have been generated successively, the 3D geological modeling platform based on Revit has been improved, and the 3D geological model of the stratified structure has been quickly created and has been applied to Liangshuijing Tunnel Engineering Project.