BIM and three-dimensional integral fused traffic engineering roadbed earthwork calculation method

The invention provides a BIM and three-dimensional integral fused traffic engineering roadbed earthwork calculation method. The method comprises the steps of generating a three-dimensional BIM model, generating a three-dimensional terrain and geology enhancement model, cutting a three-dimensional terrain triangulation network and a three-network terrain and geology enhancement model, generating an encrypted terrain and geology triangulation network, and calculating infinitesimal volume and earthwork volume. The invention provides a roadbed earthwork rapid calculation method based on a three-dimensional space volume integral thought by utilizing a traditional two-dimensional design result of a roadbed and fusing BIM (Building Information Modeling) and a topographic and geological three-dimensional modeling technology. According to the method, the three-dimensional terrain and geology enhancement model can be constructed based on the roadbed design and the terrain and geology point cloud data while the roadbed