为解决郑万高铁不良地质和特殊岩土工程地质三维模型的不充分性、地下地质现象的不可见性和地质过程的复杂性等问题，对地形测量、地质数据、测绘数据、地勘数据分析修正，建立地表地质界线、水系、交通网、覆盖层、透镜体小地质单元、岩溶系统的三维模型，通过地质与数学插值结合曲面三维模型模拟进行分析，对TIN、Grid、趋势面拟合和NURBS曲面插值和修正分析，得出描述地质不良体的几何信息、拓扑信息和属性信息。这些方法对于三维建模与修正分析过程中解析各种复杂地质体的空间信息（几何信息与拓扑关系）和各地质单元的特性信息具有一定的指导意义，符合复杂地质体表达与分析的需要，可为三维建模在工程地质边界表示与数据选取方面提供参考。

The 3D model of bad geology and special geoengineering geology of ZhengzhouWanzhou Highspeed Railway is insufficient, the geological phenomena are invisible, and the geological process is complex. Hence, the topographic measurement, geological data, mapping data and geological surveying data are analyzed and modified; 3D models of surface geological boundary, water system, traffic network, overburden, lens microgeological unit and karst system are established and analyzed by means of geological and mathematical interpolation combined with threedimensional surface model simulation; the interpolation and modification analysis of TIN, Grid, trend surface fitting and NURBS surface results are analyzed to obtain a method that describes the information of the object including geometric information, topological information, and attribute information. The method can describe the spatial information, i.e. geometric information and topological relationship, of complex geological bodies and the characteristic information of each geological unit, which can meet the needs of the expression and analysis of complex geological bodies and provide reference for threedimensional modeling in the representation and data of engineering geological boundaries.