双江口水电站工程地质三维可视化分析与应用

Analysis and application of 3D visualization of engineering geology to the Shuangjiangkou hydropower station,Dadu River,China

大渡河流域双江口水电站坝区工程地质条件复杂、地质信息众多,对工程勘探、设计及施工建设等带来了极大困难。为解决此类复杂的工程与地质问题,实现复杂地质体可视化,利用地质勘探信息建立三维地质模型,并基于纹理映射、碰撞检测、射线检测等可视化交互技术,实现三维地质的三维空间关系分析、虚拟钻孔分析及任意断面的实时剖切。研究和实践表明该方法可实现三维地质模型与现实地质体的有效信息链接和可视化交互分析,为工程地质分析、地质预测等提供基础,可有效提高工程勘探、设计与施工的信息化管理水平和效率。

As the highest dam in the world,the high-core wall rockfill dam of Shuangjiangkou hydropower station in Dadu River has complicated geological condition with numerous geological information,which arise great difficulties for engineering exploration,design and construction.A 3D geological model is established on the basis of the geological prospecting information,aiming at solving these complicated engineering and geological problems.Based on the visual interaction techniques,such as texture mapping,collision detection and ray detection,three-dimensional spatial relationship analysis,virtual borehole analysis,and real-time cutting of arbitrary cross section are carried out.It shows that this research can achieve the linkage of effective information and mutual visualization analysis between 3D geological model and real geologic body.This method provides a foundation for engineering geology analysis and geological prediction,and improves the efficiency of engineering surveys,design,constructions and information management.