基于网状含拓扑剖面的三维地质多体建模_明镜.pdfVIP

第30卷 第9期 岩 土 工 程 学 报 Vol.30 No.9 2008年 9 月 Chinese Journal of Geotechnical Engineering Sept., 2008 基于网状含拓扑剖面的三维地质多体建模 明 镜，潘 懋，屈红刚，吴自兴 (北京大学造山带与地壳演化教育部重点实验室，北京 100871) 摘 要：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。 关键词：含拓扑剖面；网状剖面；三维地质建模；多体建模 中图分类号：TP302 文献标识码：A 文章编号：1000 –4548(2008)09 –1376 –07 作者简介：明 镜(1982 – ) ，男，博士研究生，主要研究方向为三维地质建模、岩土工程建模。E-mail: eric107@ 。 Three-dimensional geological multi-body modeling from netlike cross-sections with topology MING Jing, PAN Mao, QU Hong-gang, WU Zi-xing (Key Laboratory of Orogenic Belts and Crustal Evolution of the Ministry of Education, Peking University, Beijing 100871, China) Abstract: 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