约束Delaunay四面体剖分在三维地质建模中的应用

Application of Constrained Delaunay Tetrahedralization in 3D Geological Modeling

简要介绍了地质建模概念及层状地质体建模方法,考虑到Delaunay三角剖分良好的边界约束适应能力,提出了一种以地质层面Delaunay三角网为约束条件进行约束四面体剖分构建地质模型的方法。在通过对南京河西地区钻孔数据进行自适应插值处理后,应用此算法构建该地区的三维地下浅层空间地质体模型,实践证明该方法能够得到可视化效果较好的地质模型,并可高效地支撑地学空间分析与计算,为城市规划提供更好的决策支持。

With the needs of the city continuous development, 3D （three-dimensional）geological modeling has been used more and more widely in city planning. This paper provides a brief introduction of geologic modeling concept and the 3D modeling method of stratified geological objects. Considering the better adaptive capability of the bounded constraint in the constrained Delaunay Triangulation, a geologic modeling method by constrained Delaunay Tetrahedralization with constraints of the Delau- nay Triangulation on geological stratum has been presented. After adaptive interpolation processed Hexi regionrs drill data of Nanjing, the 3D geological soild model of the 3D shallow underground space in this region is built. The result of the experimen- tal research has shown that this algorithm can get better visual geological model which can support geospatial analysis and cal- culation for city planning and provide a better decision support for stratum.