工程地质中基于OpenCASCADE的地表和地层三维建模

Ground surface and stratum of 3D modeling in engineering geology based on OpenCASCADE

为了更加直观和准确地分析工程地质中的地质信息,通过对比分析传统三角网建模方法的优缺点,展示了OpenCASCADE曲面建模技术在三维模型中的连续程度、光滑度、细腻度等方面的优势。利用该技术建立三维地表和地层层面模型,并通过地层层面的求交和缝合技术完成了地层层间实体模型构建。基于OpenCASCADE几何造型库在VC++平台下实现了地表、地层模型的三维可视化和场景控制功能。通过桥梁工程地质的实例应用,结果表明:三维地表地层模型的应用可以有效提高工程建设中地质分析和地质解译的直观性和可靠性。

In order to analyze geological information intuitively and accurately in engineering geology, the authors showed the Open- CASCADE surface modeling technology more advantages in the continuous extent, 3D model of the smooth, texture through the comparison and analysis of advantages and disadvantages of traditional modeling method of triangulation. The authors built 3D ground surface model and 3D stratum interface model using OpenCASCADE surfaces modeling technology, and completed to build stratum layers between the entity models through the intersection at the formation level and suture techniques. The study realized 3D visualization and the scene control functions of ground surface and stratum based on OpenCASCADE in Visual C＋＋. Through a case study of bridge engineering geological application, the project demonstrated that the application of 3D ground surface model and 3D stratum model could improve the efficiency and reliability of engineering geological analysis and geological explanation in engineering geology.