【摘要】 随着城市地下空间的开发利用,对三维地质结构的掌握成为科学合理开发利用地下空间的基本前提,三维地质模型的创建也得以迅速发展。三维地质结构模型可以直观展示地层空间分布形态,为地下空间资源的科学规划提供基础数据。本次工作首次完成了北京五环城区(750 km~2)的三维地质结构模型创建。建模工作基于研究区广泛分布的数千工程钻孔,通过筛选、标准化钻孔数据,绘制相应标准化地层剖面(107条),创建了钻孔模型,以及北京五环城区地下50 m以浅三维地质结构模型,并完成精度验证。本次建模过程整理了大量工程钻孔数据,综合考虑了冲洪积扇发育区地层互层、相交、尖灭、透镜体等复杂的地质现象,具有代表性,可为类似地质建模工作提供借鉴。此外,北京城区三维地质结构模型直观展示了研究区浅部的地层分布与地层结构,为后续三维属性模型的创建提供了实体框架,亦为区内地下空间资源地质评价提供了数据支撑。更多还原

【Abstract】 The three-dimensional(3D) geological structure model has been the basic preconditions for the analysis of urban underground space, because it can directly display the spatial distribution and geological properties of superficial deposits and provide basic data for the scientific planning of the underground space resources. In this paper, the authors constructed for the very first time a 3D geological structure model(up to the depth of 50 m from the surface) in Beijing City, based on almost a thousand boreholes, investigation reports, as well as 107 intersecting cross-sections arranged over Beijing City within the 5th Ring Road. The authors investigated the 3D modeling procedures in the study area, where an extremely complicated sedimentary environment is developed with various geological phenomena including intersecting stratigraphic interfaces, missing strata as well as discontinuous layers. The resulting 3D model could provide a basic framework and data support for further geological evaluation of underground space resources.更多还原