中文摘要：

提出一种基于GIS结合虚拟现实建模语言（VRML），实现实时、快速三维地质建模的简化方法。通过调用储存在GIS数据库中的钻孔岩土层信息，利用空间插值技术自动创建模型的侧面贴图，并依据标准格式自动将这些信息输出为VRML脚本。创建的模型可不依赖建模软件平台而独立展示，并可以实现自由旋转、飞行和缩放等功能。依据介绍的设计思路成功研发三维地质建模系统，并运用该系统实现某桥址区的三维地质建模。该方法具有操作简单、建模速度快、人工干预少和可视化交互操作等特点，可以作为工程勘察的辅助决策手段。

英文摘要：

A new method for 3D geological modeling is introduced, which is based on the GIS and the virtual reality modeling language（VRML）. Through getting the stratum information of each borehole, which stores in GIS, the system automatically analyzes this information and draws the profiles chart of the side faces of the model, and at the same time, the system writes VRML script file to build 3D geological model. According to the above concept, a system is developed and successfully applied to create 3D geological model of a bridge pier site. The model can be shown in internet by web browser and can be free rotated, zoomed in or zoomed out. The main advantages of this method are fast and real time in geological modeling, which can be used as an aid decision system to check the stratum information.