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引用本文:何静,何晗晗,郑桂森,刘予,周圆心,肖景泽,王纯君. 北京五环城区浅部沉积层的三维地质结构建模[J]. 中国地质, 2019, 46(2): 244-254.
HE Jing,HE Hanhan,ZHENG Guisen,LIU Yu,ZHOU YuanXin,XIAO JingZe,WANG Chunjun. 3D geological modelling of superficial deposits in Beijing City[J]. Geology in China, 2019, 46(2): 244-254(in Chinese with English abstract).
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北京五环城区浅部沉积层的三维地质结构建模
何静1, 何晗晗1, 郑桂森2, 刘予1, 周圆心1, 肖景泽1, 王纯君1
1.北京市地质调查研究院, 北京 100195;2.北京市地质矿产勘查开发局, 北京 100195
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 km2)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。
关键词:  三维地质建模  松散沉积层  工程钻孔  交叉剖面  透镜体
DOI:10.12029/gc20190203
分类号:P642.5
基金项目:北京市地质矿产勘查开发局"北京市地下空间资源调查评价及关键技术研究"项目(PXM2017_158203_000006)资助。
3D geological modelling of superficial deposits in Beijing City
HE Jing1, HE Hanhan1, ZHENG Guisen2, LIU Yu1, ZHOU YuanXin1, XIAO JingZe1, WANG Chunjun1
1.Beijing Institute of Geological Survey, Beijing 100195, China;2.Beijing Geological Prospecting and Developing Bureau, Beijing 100195, China
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 50m 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.
Key words:  3D geological modelling  superficial deposits  boreholes  cross-sections  lens