基于数字化特征的城市地下空间建模技术的研究
发布时间：2019-06-05 23:00
【摘要】：为了保证城市的可持续发展，实现城市地下空间的合理开发和利用，而开展的城市地质信息数字化，城市地下空间三维模型的构建，已成为当今三维建模在工程领域内应用的热点。本文针对石家庄工程地质的特点，以钻孔-剖面的层状地质体交互式建模方法为依据，提出了一种有效的多层DEM面模型，采用改进的Delaunay三角剖分的方法生成主TIN面，将主TIN模板沿用到所有地层大大简化了三维地质体之间复杂的拓扑关系，利用地层层面数据进行空间插值实现地层分界面的重构，将严格按照土层岩性和地层时代分层生成各个地层分界面进行缝合处理生成建模区域内的地层实体模型，最后基于计算机图形学基本理论，采用OpenGL技术对生成的多层DEM模型进行渲染处理，实现工作区域内地形和地层结构的三维可视化操作。 根据曲面求交和地层分界面缝合的基本理论，系统可自动生成地质剖面图。通过自动生成的地质剖面图与原始CAD手绘地质剖面图进行对比，给钻孔数据库进行校正和纠错。本文还探讨了如何解决系统自动生成地质剖面时出现的错误，以及对各级土层进行空间展布。这些都可以为地质工作者进行地质评价和工程决策提供帮助。
[Abstract]:In order to ensure the sustainable development of the city and realize the rational development and utilization of the urban underground space, the digitization of urban geological information and the construction of the three-dimensional model of the urban underground space are carried out. Nowadays, 3D modeling has become a hot spot in the field of engineering. According to the characteristics of Shijiazhuang engineering geology, based on the interactive modeling method of layered geological body of drilling and section, an effective multi-layer DM surface model is proposed in this paper, and the improved Delaunay triangulation method is used to generate the main TIN surface. The main TIN template is used to all strata to greatly simplify the complex topological relationship between three-dimensional geological bodies, and the spatial interpolation of formation data is used to reconstruct the formation interface. The formation of formation entity models in the modeling area will be carried out strictly according to the lithology of the soil layer and the strata age. Finally, based on the basic theory of computer graphics, The multi-layer DEM model is rendered by OpenGL technology, and the 3D visualization of terrain and strata structure in the working area is realized. According to the basic theory of surface intersection and formation interface suture, the system can automatically generate geological profile. By comparing the automatically generated geological profile with the original CAD hand-drawn geological profile, the drilling database is corrected and corrected. This paper also discusses how to solve the errors in the automatic generation of geological profiles and the spatial distribution of soil layers at all levels. All these can provide help for geologists to carry out geological evaluation and engineering decision-making.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU984.113;TU19
本文编号：2493879
[Abstract]:In order to ensure the sustainable development of the city and realize the rational development and utilization of the urban underground space, the digitization of urban geological information and the construction of the three-dimensional model of the urban underground space are carried out. Nowadays, 3D modeling has become a hot spot in the field of engineering. According to the characteristics of Shijiazhuang engineering geology, based on the interactive modeling method of layered geological body of drilling and section, an effective multi-layer DM surface model is proposed in this paper, and the improved Delaunay triangulation method is used to generate the main TIN surface. The main TIN template is used to all strata to greatly simplify the complex topological relationship between three-dimensional geological bodies, and the spatial interpolation of formation data is used to reconstruct the formation interface. The formation of formation entity models in the modeling area will be carried out strictly according to the lithology of the soil layer and the strata age. Finally, based on the basic theory of computer graphics, The multi-layer DEM model is rendered by OpenGL technology, and the 3D visualization of terrain and strata structure in the working area is realized. According to the basic theory of surface intersection and formation interface suture, the system can automatically generate geological profile. By comparing the automatically generated geological profile with the original CAD hand-drawn geological profile, the drilling database is corrected and corrected. This paper also discusses how to solve the errors in the automatic generation of geological profiles and the spatial distribution of soil layers at all levels. All these can provide help for geologists to carry out geological evaluation and engineering decision-making.
【学位授予单位】：河北工业大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU984.113;TU19
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