基于网状含拓扑剖面的三维地质多体建模

针对传统的基于剖面建模方法使用平行的共面剖面的不足,提出基于网状含拓扑剖面的三维地质多体建模方法,利用一系列含有"结点–弧段–多边形"拓扑关系的、相互连接成网状的剖面,来进行多个地质体的三维模型构建,并且模型之间没有空隙和交叠。该方法将建模区域划分为若干网格分区,每个分区独立进行模型构建,最后将各分区模型拼合成为全区整体模型。建模过程中提供对模型的整体光滑。运用北京地区的实际数据,成功建立了北京市城市地质调查中的8个地质模型,证明该方法具有快速构建大区域高精度复杂地质模型的能力。

Three-dimensional geological multi-body modeling from netlike cross-sections with topology

To overcome the limits of traditional modeling methods using parallel and planar cross-sections,a new multi-body modeling method was put forward.The netlike cross-sections with the topological relationship of "node-arc-polygon" were utilized.The resulted models,without voids and overlapping,could also be smoothened all together.During the modeling process,the target area was subdivided into several cross-section grids,which could be modeled independently.All the sub-models in each grid were merged to build the final resulted models.Eight geological models in city geology survey were successfully constructed by using real data in Beijing,and the capacity of the method to quickly and exactly simulate large area with complex geological phenomena was demonstrated.