基于GIS的边坡有限元网格自动生成研究

GIS已广泛运用于滑坡灾害研究，但GIS和数值方法相结合研究边坡问题的文献很少。原因在于边坡失稳和滑坡形成是复杂的三维空间物理力学过程，而三维空间数据模型理论还不成熟。因此，在现有GIS软件平台上实现大区域滑坡灾害数值模拟的关键在于三维有限元网格的自动生成。该文研究边坡岩土数值分析相关数据的GIS数据存储格式，提出基于栅格的六面体有限元网格生成和基于TIN的三棱柱有限元网格生成，并利用ArcGIS9．0、Amys7．0实现有限元网格自动生成。

The Method of Automatically Generating FEM Based on GIS for the Slope

GIS is widely used in the research of landslide hazard,but the literature that studies landslide hazard with the conjunction of GIS and numerical method is very less because the slope problem is the complicated physics-chemic process and the theory of 3D data model is immature.The key technique for the landslide hazard in the larger scale region simulated based on GIS is the automatical generating of 3D FEM.The paper studies the GIS-based data format for the slope numerical analysis and presents generating methods based on TIN and grid respectively.The automatic generating program is developed with the tools of ArcGIS 9.0 and Ansys 7.0.This paper will promote the application of GIS for the slope model and utilize the capability of GIS data management and operation to increase the precision of the slope FEM.