含尖灭地层的地质剖面图自动生成与2D/3D绘制

An Automatic Generation and 2D/3D Visualization for Geological Sections with Strata Pinch-Out

目的研究含尖灭地层的地质剖面图自动生成方法,提供岩土工程中复杂地质剖面分析直观形象的二三维对照作业新模式.方法基于钻孔数据,融合专家知识和经验,顾及主次地层交错的复杂地层层序对应关系,添加虚拟地层进行钻孔数据预处理,建立地层连接规则,以实现含尖灭地层地质剖面的自动生成和工程图绘制;并采用三维可视化技术实现任意地质剖面的立体展示.结果能够自动绘制并输出符合岩土工程制图规范的地质剖面工程图件,实现任意路径地质剖面图的生成与三维可视化,提高了岩土工程区地下空间的直观性,降低了地质剖面的解释难度.结论地质剖面图的二维制图与三维展示相结合丰富了岩土工程勘察报告的图件成果,为可视化信息查询和交互剖面分析提供了依据,具有较高的推广应用价值.

An approach for automatically generating geological sections with strata pinch-out is proposed, which provides a new operating method for complex geological interpretation and analysis, by interactively contrasting traditional 2D map and 3D visualization of geological sections. Taking expert knowledge and experiences into account, the borehole data is prerocessed by interpolating virtual boreholes, considering complex correspondence relations between sequential and non-sequential strata. The specific rules for connecting corresponding strata are proposed for automatically generating and drawing complex geological sections with strata pinch-out. Visualization technology is used to display 3D geological sections. 2D geological section maps can be drawn automatically ,meeting the mapping specifications for geotechnical engineering. 3D geo- logical sections along arbitrary route can be generated automatically and visualized in 3D environment. The approaches have been applied to several geotechnical engineering cases in Shenyang. The combination of 2D mapping and 3D visualization enriches map products of geotechnical engineering, and provides possibilities for information query and geological analysis with interactive method, which is proved with well effect and high application value.