Integration of Engineering Geological Investigation Data and Construction of a 3D Geological Structure Model in the Xiong’an New Area
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摘要:
雄安新区位于太行山以东平原区，100 m以浅地层以冲洪积冲湖积砂层和黏土层为主，工程地质条件良好。中国地质调查局组织实施了工程地质勘查工作，获取了百余个钻孔的地层、标贯、测试等地质数据，形成了雄安新区工程地质勘查技术方法体系，建立了工程地质钻孔数据库及三维模型，为雄安新区规划建设提供了有力支撑。本文从工程地质钻探数据获取、数据集成方法、地质资料处理技术等方面进行了整理和归纳，利用三维可视化软件建立工程地质三维结构模型。以雄安新区工程地质勘查数据集应用的实例，为城市地质调查和数据集处理及应用提供参考。
Abstract:The Xiong’an New Area is located in the plain to the east of the Taihang Mountains, where the shallow strata within 100 m under the earth’s surface mainly consist of alluvial-proluvial and alluvial-lacustrine sand beds and clay layers, with excellent engineering geological conditions. Through engineering geological investigations, the China Geological Survey has obtained data of the strata, standard penetration and tests of more than 100 boreholes, thus forming a system of techniques and methods in the Xiong’an New Area, and establishing the engineering geological borehole database and a three-dimensional model. This will provide strong support for the future planning and construction in the Xiong’an New Area. This paper introduces data acquisition, data integration, geological data processing technology in engineering geological investigation, and explores the method using 3D visualization software to establish the 3D structure geological model, in a bid to provide reference for urban geological survey and dataset processing with the real application of a engineering geological dataset in the Xiong’an New Area.
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表 1 数据库(集)元数据简表
条目 描述 数据库(集)名称 雄安新区工程地质三维结构模型数据集 数据库(集)作者 马 震，中国地质调查局天津地质调查中心
夏雨波，中国地质调查局天津地质调查中心
王小丹，中国地质调查局天津地质调查中心数据时间范围 2017年 地理区域 东经115°37′～116°19′，北纬38°41′～39°10′ 数据格式 地质体格式为OBJ /Creatar，点集和面集格式为ArcGIS 数据量 16.5 MB 数据服务系统网址 http://dcc.cgs.gov.cn 基金项目 中国地质调查局地质调查项目“雄安新区工程地质与水土质量调查”(121201004000172201) 语种 中文 数据库(集)组成 包括地质体集、点集和面集3个数据集，地质体集包括18个地层地质体，点集包括乡镇.SHP和县.SHP，面集包括行政区顶面 
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表 2 钻孔基本信息
序号 数据项名称 数据类型 实例 1 钻孔编号 字符串 G7039 2 X坐标 浮点型 406051.22 3 Y坐标 浮点型 4326929.35 4 孔口高程 浮点型 9.08 5 孔深 浮点型 100.14
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表 4 文件属性数据项统计表
数据类型 基本属性 扩展属性 体属性 地层地质体 ID、名称、类型 地层属性、描述 体积、块体个数 点文件 ID、名称、类型 属性、描述 顶点数目 面文件 ID、名称、类型 属性、描述 点数目、三角形数目、分界点数目
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Table 1. Metadata Table of Database (Dataset)
Items Description Database (dataset) name 3D geological structure model dataset in Xiong’an New Area Database (dataset) authors Ma Zhen, Tianjin Center, China Geological Survey
Xia Yubo, Tianjin Center, China Geological Survey
Wang Xiaodan, Tianjin Center , China Geological SurveyData acquisition time 2017 Geographic area 115°37'–116°19' E, 38°41'–39°10' N Data format The format of geological body is OBJ/Creatar, and the format of point set and surface set is ArcGIS Data size 16.5 MB Data service system URL http://dcc.cgs.gov.cn Fund project China Geological Survey project titled “Engineering Geological and Soil & Water Quality Survey of Xiong’an New Area” (121201004000172201) Language Chinese Database (dataset) composition The dataset comprises three subdatasets, namely, geological body set, point set and surface set. The geological body set includes eighteen stratigraphic geological bodies; the point set includes township SHP and county SHP; the surface set includes the top surface of the administrative region.
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Table 2. Basic Information of Boreholes
Number Name of data item Data type Example 1 Borehole number String G7039 2 X-Coordinate Floating 406 051.22 3 Y-Coordinate Floating 4 326 929.35 4 Elevation of borehole Floating 9.08 5 Borehole depth Floating 100.14
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Table 3. Borehole Layer Information
Number Name of data item Data type Example 1 Borehole number String G7039 2 Starting depth Floating 0.0 3 Ending depth Floating 0.6 4 Formation number Floating 1
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Table 4. Statistics of Attribute Data Items
Data type Basic attribute Extended attribute Body attribute Stratigraphic geological body ID, name, type Stratigraphic property, descriptions Volume and number of blocks Point file ID, name, type Attributes, descriptions Number of vertices Surface file ID, name, type Attributes, descriptions Number of points, number of triangles, number of demarcation points
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