郑万客专复杂地质三维建模中存在的问题及解决方法

Existing Problems and Solutions for Complex Geological Modeling of Zhenzhou East-Wanzhou North Dedicated Passenger Railway Line

为解决郑万客专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带来的问题,分析修正地形测量数据、地质数据、测绘数据和地勘数据,建立地表地质界线、水系、交通网、覆盖层、透镜体小地质单元和岩溶系统的三维模型,通过地质与数学插值,结合曲面三维模型进行模拟分析。通过TIN和Grid趋势面拟合及NURBS曲面修正,得出描述地质不良体的几何信息、拓扑信息和属性信息。在三维建模与修正分析过程中,这2种方法对解析各种复杂地质体的空间信息、几何信息、拓扑关系和各地质单元的特性信息具有一定指导意义,为郑万客专复杂地质三维建模在工程地质中的应用提供借鉴参考。

To solve problems due to the unfavorable geology,the insufficiency in 3D geological modeling for special geotechnical engineering,the invisibility of underground geological phenomena and the complexity of geological process,etc.in view of the Zhenzhou East-Wanzhou North Dedicated Passenger Railway Line,the article analyzes and corrects topographic survey data,geological data,mapping data and geological exploration data;establishes 3D models for surficial geological boundaries,water systems,communications networks,overburden,lens-based small geological units and karst systems;conducts a simulation analysis in combination of 3D surface models by means of geological and mathematical interpolation.Based on TIN&Grid trend surface fitting and NURBS curve surface correction,it obtains geometry,topology and property information unfavorable geologic bodies.During 3D modeling and correction analysis,these two methods are instructive to some extent for analyzing the spatial&geometrical information on various complex geologic bodies,their topological relation and the property information on each geological unit,thus providing references for the application of complex geological 3D modeling in engineering geology of the Zhenzhou East-Wanzhou North Dedicated Passenger Railway Line.