三维地质模型动态更新方法研究——以水利水电工程为例

Research on Dynamic Update Method of 3D Geological Model: a Case Study of Water Resources and Hydropower Projects

三维地质建模是指将地下三维空间中的各类地质数据信息,综合起来形成三维定量模型。三维地质建模的动态更新一直是研究者们关心的热点话题,针对三维建模及可视化的研究,作者团队已经基于IDL研发了三维可视化平台,并形成了基本的建模工具,包括二维数据的三维化处理、三维对象编辑、曲面拟合及曲面剪切等,并已经在水利水电工程中进行了实际应用。在上述已有三维建模工具的基础上,对三维建模方法进行归类,按照三维空间模型表达的具体对象(例如地形面、水位面、基岩面等)进行分类,设计三维建模过程相对固定流程,以脚本驱动的方法,实现三维模型修正过程的动态更新,该方法适用于工程数据随着工程进展需要不断更新的三维可视化模拟工作。该方法在水利水电工程三维建模中进行了应用,取得了预期的效果。

3D geological modeling refers to integrating the kinds of geological data in 3D underground space to form 3D quantitative model. The dynamic update method of 3D geological model is always the hot topic of researchers. Pointing at 3D modeling and visu-alization, the author team has developed a 3D visualization platform based on IDL and formed the basic modeling tools including pro- cessing data from 2D to 3D, 3D objects editing, surface fitting, surface cutting etc. which have been applied in water resources and hydropower projects practically. On the basis of the existing 3D modeling tools, this paper classifies the 3D modeling methods ac- cording to the specific objects of 3D spatial model expression （ such terrain surface, water surface, bedrock surface and so on） and designs 3D modeling process as relatively fixed processes. Besides, this paper achieves dynamic update of 3D model modification process through script-driven approach fitting into 3D visualized simulation in which the engineering data needs updating constantly with the progress of works. This method has been applied in 3D modeling of water resources and hydropower projects, and the antic-ipated results have been achieved.