基于钻孔数据的三维可视化快速建模技术的研究

Study of technology of fast 3D modeling and visualization based on borehole data

为了实现三维建模过程的智能化以及自动化,以及使复杂地质体三维建模过程变得简单,针对CAD图形资料编写了能够直接将地表、钻孔等地质信息读入到数据库的DXF接口程序,提出了一种利用GA-Kriging插值手段对地层属性进行插值并最终实现三维可视化快速建模的方法,并且在此基础上基于VTK图形库实现了三维建模、等值线绘制、钻孔显示、切片以及特定地层的提取以及体积的计算等功能。在编写Kriging插值算法时,为了实现块金常数、变程等常数取值的自动化、最优化,应用GA智能算法求解。最后,通过地铁隧道的一个工程实例,对建模方法以及相应的算法模块进行了验证,表明方法具有一定的优越性。

For the purpose of intellectualization and automation in the process of 3D modeling and also for simplification of complex geological body modeling,DXF interface program which can read the borehole data and some other drawing data from CAD and rewrite it to database or visualize it is programmed.The 3D fast modeling method is put up with,which dose the interpolation with stratus attribute values by means of GA-Kriging.Moreover,the functions including modeling,contours drawing,display of boreholes,slicing of strata,extraction of special stratum,calculation of volume and so on.In the programming of Kriging interpolation method code,the GA intelligent algorithm is applied for the calculation of constant parameters such as nugget constant and range.It is proved that in this way global optimal solution of the parameters can be obtained easily.Finally,an engineering instance is given to test whether this kind of modeling method and related program codes are appropriate or not;it is shown that in this way the 3D modeling becomes easy and efficient.