某水利枢纽厂房开挖三维可视化与数值模拟耦合研究

Study on coupling of 3D visualization with numerical simulation for powerhouse excavation of a certain hydro-junction

对某水利枢纽工程坝址区工程地质三维可视化与FLAC3D数值模拟耦合进行了研究。利用钻孔信息,采用多层DEM技术建立三维格网地层模型,然后,将各种工况几何形体映射到地层格网上。在此基础上,根据FLAC3D建模特点,用一系列横截面切割此三维地质模型,并保证相邻两剖面拓扑一致(或退化),再通过对相邻剖面网格调整、连接形成FLAC3D基本单元。运用此方法实现了该水利枢纽工程三维数值模拟。

This paper studies the coupling of engineering geology 3-D visualization with numerical simulation applied to some hydro-junction. The regular-grid stratified geological model is established through DEM techniques; and then based on bore data, and the boundaries of geometrical bodies under a series of working condition are mapped to the grids of the model. And the geological model is subdivided by a series of cross-sections under the condition that the topologies of two cross-sections are same (or one is degeneration of the other) if they are neighbors. After the cross-sections are obtained, the primitive meshes provided by FLAC3D are formed by adjusting and linking the grid points of two neighbor sections. By the method, numerical simulation of the hydro-junction engineering are carried into effect.