城市区域三维地质结构模型建设与集成方法

Construction and Integration Method of 3D Geological structure Model in Urban Area

大区域高精度城市三维地质模型可以实现多源数据有效集成,提升城市地质工作成果的可视化表达能力。本文剖析了交叉折剖面、多源交互式复杂地质体建模等适用于城市地质三维建模的技术方法,并对每种方法的适用性及优劣势进行了详细的描述。以GeoBGS平台为基础,利用不同数据模型的特点,通过标准化钻孔数据库、基准钻孔库、基准剖面库及地层模型的建设实现了通州区范围的土壤环境、地下水环境、地面沉降等多专题信息地质模型。将多专题地质模型进行集成显示和分析,构建了通州区域三维地质集成模型展示系统。为满足空间一体化表达的应用需求,通过空间配准、坐标系统转换及地下模型的拓扑修复,确保了地上地下一体化模型在同一坐标系下的无缝集成。

The large area and high precision urban 3D geological model can realize the effective integration of multi-source data and improve the visualization expression ability of the urban geological work. In this paper, the cross section, multi-source interaction and complex geological modeling are applied to 3D modeling of urban geology. The applicability, advantages and disadvantages of each method are described in detail. Based on GeoBGS platform, using different data models, through standardization, construction drilling database library, library and reference section formation model realizes the benchmark drilling soil environment, groundwater environment, land subsidence and other geological model of Tongzhou District range thematic information. The multi thematic geological model is integrated and analyzed, and the 3D geological integration model display system of Tongzhou District is constructed. In order to meet the application needs of spatial integrated expression, spatial integration, coordinate system transformation and topology repair of underground models ensure seamless integration of ground and underground integrated models in the same coordinate system.