工程尺度地质结构三维参数化建模方法

doi:10.13722/j.cnki.jrme.2019.0673

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摘要三维地质建模是定量研究三维地质空间结构特征与变化规律的重要方法。然而，目前的地质建模方法仍然存在人机交互过多、反馈更新修改困难、建模周期长等局限，因此提出基于NURBS的工程尺度地质结构三维参数化建模方法。针对工程尺度地质结构对象，该方法包括地质曲线曲面形变参数化表达、三维地质参数化建模数学定义、工程地质的混合数据结构模型等，在三维可视化环境中实现地质点数据集(多波束水深点、等高线、钻孔点等)的参数化导入、地质结构面的参数化拟合、地质轮廓体的参数化生成，同时进行面与面和面与体的参数化切割、组合等一系列操作；随着地质数据源的变化，参数化地质模型可动态更新以适应不同阶段建模精度要求。实际工程应用表明，该方法相比传统建模方法的效率大幅提高，为较大尺度的工程地质对象建模提供了新的技术手段。

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	李明超1
	白硕1
	孔锐2
	任秋兵1
	韩帅1
	田会静3

关键词 ：岩石力学, 地质结构, 工程尺度, 三维地质建模, NURBS, 参数化建模

Abstract：3D geological modeling is a valid method to quantitatively study 3D spatial structure characteristics and variation laws. However，there are still some limitations in current geological modeling methods，such as excessive man-machine interaction，difficulty in updating and modifying feedback，and long modeling period. In this paper，a 3D parametric modeling method for engineering-scale geological structure based on NURBS is proposed. For engineering scale geological structure objects，this method includes parametric expression of deformation of geological curves and surfaces，mathematical definition of 3D geological parametric modeling，and mixed data structure model of engineering geology. Implementing parameterized importation of geological point data sets(multi-beam water depth points，contours，drilling points，etc.) in 3D visualization environment，parametric fitting of geological structural planes，parametric generation of geological contours. At the same time，a series of operations，such as parametric cutting and combination of surface and surface and volume are carried out. With the change of geological data sources，geological models can be updated dynamically to meet the requirements of modeling accuracy in different stages. Practical engineering application shows that the efficiency of this method is greatly improved compared with the traditional modeling method，which provides a new technical means for large-scale engineering geological object modeling.

Key words： rock mechanics geological structure engineering scale 3D geological modeling NURBS parametric modeling

引用本文:

李明超1，白硕1，孔锐2，任秋兵1，韩帅1，田会静3. 工程尺度地质结构三维参数化建模方法[J]. 岩石力学与工程学报, 2020, 39(S1): 2848-2858.
LI Mingchao1，BAI Shuo1，KONG Rui2，REN Qiubing1，HAN Shuai1，TIAN Huijing3. 3D parametric modeling method of engineering-scale geological structures. , 2020, 39(S1): 2848-2858.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2019.0673 或 http://rockmech.whrsm.ac.cn/CN/Y2020/V39/IS1/2848

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