大型水电工程地质信息三维可视化分析理论与应用

Theory and Application of 3D Visual Analysis for Large-Scale Hydropower Engineering Geologic Information

地质信息可视化是大型水电工程可视化设计的基础,同时也是工程地质和数学地质领域的研究热点和难点。在深入研究复杂地质构造和可视化理论的基础上,针对无规律变化的地质体形态,引入NURBS技术,并结合地质交互解译、TIN算法和地质趋势面分析等理论方法,实现了三维地质模型的重建.基于模型进行了任意剖切、岩体质量分级、等值线自动生成和地质填挖计算等一系列可视化分析,并完成了模型地质信息的可视化管理与查询.根据上述理论与方法集成的VisualGeo系统已在锦屏一级、溪洛渡、糯扎渡和龙滩等大型水电工程设计中得到应用.

Visualization of geologic information is the basis of visual design for large-scale hydropower projects,and is the research focus and nodus in the fields of mathematical geology and engineering geology.Based on the study of complex geological structures and visualization theory in depth,NURBS technique is introduced according to irregular geologic configurations.Integrated with interactive geological interpretation,TIN algorithm and geological trend surface analysis,3D geologic model is reconstruced.Then based on the model a series of visual analysis functions including arbitrary cutting,rock-mass quality classification,automatic generation of contour line and computing excavation volume,are carried out. In addition,the corresponding database could manage and query the geological information of the model visually.The integrated system(VisualGeo)has been applied to the design of several large-scale hydropower projects,such as Jinping First-level,Xiluodu,Nuozhadu and Longtan.