各向异性地质体精细三维建模的新方法

A new method of precise 3D modeling for anisotropic geological body

为建立精度更高的各向异性地质体模型,并更直观地呈现其空间分布优选方位,通过对克里金插值与离散平滑插值方法及相关软件的分析,提出联合这2种插值方法对各向异性地质体的精细三维建模方法流程:数据收集整理——各向异性取点克里金插值——误差分析——离散平滑插值三维建模。以上海东部某新近吹填区下伏软弱层(4)层土层为三维建模对象,直观地呈现出了建模区(4)层土层的空间分布优选方位,为该区地基处理、地质灾害(如地面沉降)防治等工程提供了可靠度更高的参考依据。

To establish the models for anisotropic geological body more precisely and display its preferred orientation of spatial distribution more explicitly, based on analysis of related software, this paper proposes a new 3D modeling method for anisotropic geological body by using Kriging Interpolation and Discrete Smooth Interpolation （DSI）. The steps of the method include ： data collection and sorting, Kriging Interpolation allowing for anisotropic distribution of these data, error analysis, and 3D modeling with DSI. This modeling method was applied to the study on weak layer （4） in a land newly reclamation zone of east Shanghai, showing the preferred orientation of spatial distribution of the weak layer （4） more directly, which provides reference and evidence of higher reliability for the projects such as foundation treatment, surface settlement prevention and treatment in the area.