摘要
三维地层模型是地下工程辅助分析的有效工具,而工程钻孔数据是建模主要的数据源。由于地质现象的复杂性和采样数据的稀疏性,仅仅利用零散的钻孔采样数据无法有效地控制最终建模结果的误差和精度。在分析三维地层建模误差来源的基础上,提出并实现了两种误差修正方法:地质剖面修正法和虚拟孔修正法。在建模过程中,基于实际勘察获取的资料和工作经验,结合对地质模型的理解,在特定位置处生成能反映地层局部变化特征的地质剖面或虚拟孔,然后将其与实际的钻孔数据一起约束到模型之中,构建出相对精细的三维地层模型,从而在三维空间中实现对地层模型的精确修正。
3D strata model is useful to support underground engineering, and borehole data is the chief source for 3D geology modeling. For the complexity of geological entity and the sparsity of sample data, it is unable to control the accuracy of modeling outcome only using scattered borehole data. Based on the analysis of the source of modeling error, two approaches for error correction of 3D strata modeling from borehole data, called the cross-section method and the virtual borehole method, are presented. During the modeling process, cross-sections and/or virtual boreholes can be added directly to the 3D strata model in the proper place for the engineers＇ demand and comprehension. Cross-sections and/or virtual boreholes, which represent the local variation character, restrict the model just as real boreholes to generate solid model accurately, and it is easy to correct the error of 3D strata model using those approaches.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2006年第2期268-271,共4页
Rock and Soil Mechanics
基金
国家高技术研究发展计划(863计划)项目资助(No.2001AA135170)
关键词
三维地层模型
误差修正
剖面
虚拟孔
可视化
3D strata model
error correction
cross-section
virtual borehole
visualization
