基于ArcGIS的边坡沉降分析及三维模拟

Arc GIS-based analysis and 3D simulation on slope settlement

本文以贵州三板溪水电站边坡所获得的基础数据为例,结合三板溪水电站的边坡变形观测的工作实践,利用ArcGIS中的空间分析和三维分析模块,进行数据的综合处理和分析,通过采用反距离加权插值算法,生成DEM(数字高程模型)。在此基础上,生成三板溪水电站边坡的沉降等值线图、沉降三维模拟图。结果表明,以ArcGIS生成沉降曲线图的方法比传统方法更快捷、准确,沉降三维模拟图更直观和逼真,可及时、精确、高效地将沉降信息和变形情况反映给大坝监测中心,是一种快速、直观表达沉降观测成果的有效方法。

By taking the basic data observed from the slope of Sanbanxi Hydropower Station as the study case,a comprehensive processing and analysis are made on the data with the Arc GIS spatial analysis and 3D analysis module in accordance with the practice of the deformation observation made on the slope of Sanbanxi Hydropower Station,and then a DEM( Digital Elevation Model) is generated through the adoption of the inverse distance weighting method. On the basis of this,the isogram of settlement and the 3D simulating diagram of settlement for the slope of the hydropower station are generated as well. The result shows that the method for generating the settlement curve is quicker and more correct than that of the conventional one; from which the 3D simulating diagram of settlement is more intuitive and accurate and then the settlement information and the deformation status can be timely,correctly and effectively transfered to the dam monitoring center. Therefore,it is really an effective method for quickly and intuitively expressing the settlement observation result concerned.