【摘要】 高精度的三维地质模型是城市地下空间开发利用的数字底座。由于地质体的复杂性和地质数据的多源异构性，导致市域级建模在精度、规模与更新方面的问题都较为棘手。文章利用深探地学建模软件（DI）研究了市域级地质建模中多源数据融合、地质结构精确表征、模型无缝拼接与动态更新等核心技术，形成了数据准备、结构-属性建模、模型耦合与评价的完整工作流程，并通过北京全域大规模建模与南宁轨道交通线路精细化建模两个案例，验证了该技术的可行性，但还存在数据质量低、复杂地质结构表征能力不足、平台集成度与交互性差等问题。地质建模技术正在向智能化、平台一体化、数据共享交互的方向持续发展。更多还原

【Abstract】 High-resolution 3D geological models have been used in cities to build and use an underground space. Due to the complex nature of the geological bodies and multi-source heterogeneous nature of geologic data, problem of accurate, scale, and updating of city-level modeling remains challenging. In this paper, we study key technologies of city-level geological modeling, such as multi-segment fusion, accurate geoscience-based geological structures characterization, seamless model integration, and dynamic update. A complete workflow consisting of data preparation, structural and attribute modelling, model coupling, and test is made. Two case studies, large-scale modelling of the whole Beijing area, and detailed modeling for Nanning rail transit line, are tested. Issues of low data quality, low capability of representing complex geosciences, and poor platform integration and interaction remain. Geological modeling technology is now advancing toward higher intelligence, platform unification, and more sharing and interoperability.更多还原