为解决城市地质中的基于剖面的浅层地质体建模过程中的地质剖面自动对比问题，实现3维地质体模型的动态重构与局部更新，将3维拓扑推理引入3维地质建模，通过剖面投影方法在3维空间曲面上实现拓扑关系的自动构建与推理，提升地质剖面对比维数，提高地质剖面自动对比自动化程度，实现城市地质中3维层状地质体动态建模。该方法已应用于南京城市地质3维建模中，结果表明该方法适应多种剖面数据，提高了地质空间3维建模效率。

A dynamic geological modeling method based on topology reasoning among sections is presented in this paper in order to resolve the geological section correspondence problems，which results in the bottlenecks of automatic modeling，and enables the 3D stratified geological solid model to be updated dynamically.With topology relationship construction and reasoning on the three-dimensional surface，this method increased the dimensions of the geological section correspondence，and implemented dynamic three-dimensional geological modeling.This method had been used in Nanjing urban geologic three-dimensional modeling.The result indicated that it was suitable for many kinds of section data，and enhanced the three-dimensional modeling efficiency.