基于GIS的不良地质三维建模及线路优化设计研究

现代选线设计更为注重地质选线、环境选线的理念,需要对选线区域的地质问题进行有效的可视化表达。基于Arc GIS对三维数据处理及其可视化功能,在建立三维地形环境的基础上,通过获取不良地质的矢量、栅格数据以及钻孔数据,建立不良地质实体模型,并将其叠加到三维地形中得到三维地质选线环境,从而对经过不良地质区域的线路进行更加全面地平立面绕避方案比选,解决单一平面绕行引起的方案缺失问题,使线路设计方案更具科学性。

Research on GIS-based 3D modeling of Unfavorable Geology and Route Optimization Design

The modern design of route selection highlights the theory of geological and environmental route selection. Therefore,it is necessary to visualize effectively the geological issues in the area where route is selected. Based on the Arc GIS's visualization function and its 3 D data processing in the setting of3 D topographic environment,this paper establishes the solid model of unfavorable geology through getting vector,raster data and borehole data of unfavorable geology. The 3 D geologic environment of route election is identified with the model overlapped onto the 3 D terrain,and then all elements involved in the route selection in unfavorable geologic area are compared comprehensively to solve the problems caused by planar circumventing and fulfill the route design more scientifically.