基于GTP-TEN的复杂地质体三维混合建模  

3D hybrid modeling of complex geological bodies based on GTP-TEN

作　　者：蔡思敏 任伟中[1,2] 冯亮 刘奕镳[1,2] 刘晨晨 徐文辉 CAI Simin;REN Weizhong;FENG Liang;LIU Yibiao;LIU Chenchen;XU Wenhui(Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China;CCCC Second Highway Consultants Co.,Ltd.,Wuhan,Hubei 430056,China)

机构地区：[1]中国科学院武汉岩土力学研究所,湖北武汉430071 [2]中国科学院大学,北京100049 [3]中交第二公路勘察设计研究院有限公司,湖北武汉430056

出　　处：《岩石力学与工程学报》2023年第2期441-449,共9页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家重点研发计划资助项目(2021YFC1523400)。

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。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.

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 

分 类 号：P642[天文地球—工程地质学]