基于GTP-TEN的复杂地质体三维混合建模

doi:10.13722/j.cnki.jrme.2022.0239

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摘要为解决三维地质体模型内部属性信息查询及空间力学分析问题，提出一种基于广义三棱柱–四面体体元的三维复杂地质体建模方法。首先根据钻孔及剖面数据，结合地层地质演变历史和水平集理论对研究区域进行地层划分，然后采用Kriging法在钻孔点云数据中引入虚拟钻孔，构建各地层层面不规则三角网模型，最后通过广义三棱柱–四面体体元算法建立研究区域内的三维复杂地质体模型。除此之外，在地层层面构建算法中还预设了局部区域属性信息提取及加密算法以保证后期模型应用时的计算分析精度要求。采用该方法可以实现地层不整合、尖灭及透镜体等特殊地质现象的表达和地质体内部属性信息提取及局部精细化模型构建，为后续进行工程稳定性分析提供可同时实现可视化的计算模型。将该方法应用于深圳市光明新区红坳渣土场，结合钻孔数据和剖面数据构建了渣土场的真三维地质模型，实现了其内部属性信息的空间查询与分析，为渣土场的稳定性分析奠定了基础。

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	蔡思敏1
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	任伟中1
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	冯亮3
	刘奕镳1
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	刘晨晨1
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	徐文辉1
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关键词 ：工程地质, 地质建模, 真三维模型, 特殊地质现象, Kriging插值, GTP-TEN方法

Abstract：To solve the problem of querying the internal property information and spatial mechanics analysis of 3D geological model，a 3D complex geological modeling method based on generalized trigonal-tetrahedral voxel is proposed. The method is formulated as follows：firstly，the strata of the study area are divided according to the borehole data and profiles，combined with the geological evolution history of the strata and the theory of horizontal set theory，and then the Kriging interpolation method is used to introduce virtual boreholes into the borehole point cloud data. After that the irregular triangular network algorithm is applied to construct the stratigraphic model，and finally the 3D complex geological body model in the study area is established by the generalized trigonal-tetrahedral voxel algorithm. In addition，the local area property information extraction and encryption algorithm are preset in the strata-level construction algorithm to ensure the accuracy of computation and analysis when the model is applied later. This method enables the expression of special geological phenomena such as stratum unconformity，cusp extinction and lenticular body，as well as the extraction of internal attribute information of geological bodies and the construction of local refinement models，which provides a computational model that can be visualized simultaneously for subsequent engineering stability analysis. Taking the Hong?ao muck field in Guangming New District of Shenzhen as an example，a true 3D geological model was constructed by combining the borehole data and profile data of the muck field，which realized the spatial query and analysis of the internal property information of the spoil site and laid the foundation for the stability analysis of the muck field.

Key words： engineering geology geological modelling real 3D model special geological phenomena Kriging interpolation method GTP-TEN method

引用本文:

蔡思敏1，2，任伟中1，2，冯亮3，刘奕镳1，2，刘晨晨1，2，徐文辉1，2. 基于GTP-TEN的复杂地质体三维混合建模[J]. 岩石力学与工程学报, 2023, 42(2): 441-449.
CAI Simin1，2，REN Weizhong1，2，FENG Liang3，LIU Yibiao1，2，LIU Chenchen1，2，XU Wenhui1，2. 3D hybrid modeling of complex geological bodies based on GTP-TEN . , 2023, 42(2): 441-449.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2022.0239 或 http://rockmech.whrsm.ac.cn/CN/Y2023/V42/I2/441

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