| 沉积地层系统三维实体模型构建方法 |
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| 引用本文： | 朱良峰,孙建中,张成娟.沉积地层系统三维实体模型构建方法[J].岩土力学,2012,33(11):3243-3250. |
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| 作者姓名： | 朱良峰 孙建中 张成娟 |
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| 作者单位： | 1. 华东师范大学 地理信息科学教育部重点实验室，上海 200062；2. 中国科学院 上海高等研究院，上海 201203； 3. 上海市城市化生态过程与生态恢复重点实验室，上海 200062 |
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| 基金项目： | 国家自然科学基金，国家科技专项，上海市城市化生态过程与生态恢复重点实验室开放基金 |
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| 摘 要： | 全面系统地研究了沉积地层系统三维实体构模的原理、方法及实施过程。针对沉积地层系统的几何结构特征，提出了一种基于钻孔数据的三维实体模型生成方法“钻孔-层面-实体法”。该方法首先使用二分拓扑结构将钻孔数据离散化为一系列散点，基于这些散点插值拟合出各个地层顶、底界面的初始高程，自动推算出缺失地层的地质成因；然后按照不同的地质成因，自动对缺失地层及其控制界面进行交切处理、高程调整与一致性处理；最后生成用三维块体或三棱柱体元充填的三维实体模型。通过上海城建工程中的一个应用实例验证了“钻孔-层面-实体法”的有效性。
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| 关 键 词： | 实体建模 三维可视化 沉积地层系统 钻孔 地层 |
| 收稿时间： | 2011-07-20 |
Construction method of three-dimensional solid models for sedimentary stratigraphic systems |
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| ZHU Liang-feng
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SUN Jian-zhong
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ZHANG Cheng-juan.Construction method of three-dimensional solid models for sedimentary stratigraphic systems[J].Rock and Soil Mechanics,2012,33(11):3243-3250. |
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| Authors: | ZHU Liang-feng SUN Jian-zhong ZHANG Cheng-juan |
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| Institution: | 1. Key Laboratory of GIS of Ministry of Education, East China Normal University, Shanghai 200062, China; 2. Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201203, China; 3. Shanghai Key Laboratory for Urban Ecological Processes and Eco-Restoration, Shanghai 200062, China |
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| Abstract: | A general principle, a practical method and a modeling process of three-dimensional solid models for sedimentary stratigraphic systems are discussed. Based on the structural characteristics of the sedimentary stratigraphic system, a new approach for generating 3D solid models from borehole data, termed the “boreholes-surfaces-solids method”, is presented and described. At first, a topologic dimidiate data structure is used to discretize borehole data into a series of scattered points. And then, the initial elevations of the top and bottom surfaces for each stratum are interpolated to automatically deduce the genesis of the missing strata. According to different geological geneses, surfaces intersecting, elevations adjusting and consistency processing are performed automatically on the missing strata’s surfaces and their control surfaces. Finally, the solid model filled with 3D blocks or triangular prism meshes is built. A concrete example of using the “boreholes-surfaces-solids” method to Shanghai’s construction projects is presented; and it is shown that this method is effective. |
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| Keywords: | solid modeling three-dimensional visualization sedimentary stratigraphic system borehole stratum |
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