摘要
为解决内陆复杂地质条件下城市地质精细化三维建模问题,利用现有城市地质多元信息,提出了通过收集资料并数字化、剖面的选取及精度的确定、选取钻孔并标准化、建立剖面图、构建三维地质体、三维空间数据库精度评价6个步骤的建库方法,并以长株潭城市群核心区为实例,实现了丘陵复杂地质条件下数据库建库工作。通过未参与建模的实际孔对数据库分层厚度、地层埋深进行了误差精度分析,地层厚度平均误差为2.03 m,地层埋深平均误差为2.58 m,精度良好。
In order to solve 3D modeling precise problem of urban geology under the inland complicated geological condition,the paper proposes the database construction method in six steps,which are data collection and digitization,section selection and precision determination,drilling hole selection and standardization,profile construction,establishment of 3D geological body and precise evaluation of 3D spatial database by the usage of the multiple geological information of the city.For an example of the core area of Chang-Zhu-Tan urban agglomeration,the database construction is accomplished under the complicated geological condition of the hilly area.The accuracy analysis of error is conducted on the stratum layer thickness and burial depth in the database through the actual drilling holes which are not involved in modeling.The precision is very high with an average error of 2.3 meters in the stratum thickness,and an average error of 2.58 meters in the burial depth of strata.
作者
毛寅
曾玉清
贺安生
张杨
范春玉
MAO Yin;ZENG Yuqing;HE Ansheng;ZHANG Yang;FAN Chunyu(Center For Natural Resources Affairs of Hunan Province,Changsha 410000,Hunan,China)
出处
《矿产与地质》
2020年第2期391-395,共5页
Mineral Resources and Geology
基金
中国地质调查局“长江中游城市群地质环境调查与区划、长株潭城市群核心区三维城市地质调查”(编码:1212011220017、1212010914009)项目资助。
关键词
城市地质
三维空间地质数据库
多元地学信息
精度评价
urban geology
3D spatial geological database
multiple geoscience information
precise evaluation
