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用方格网法进行土方计算,成果直观,便于客户对计算结果进行检核,但传统的方格网法计算精度无法有效保证,尤其是在遇到特殊地形时(如较大陡坎、斜坡穿过格网),计算结果存在较大误差。为此,本文设计了一种改进的计算方法,根据测区内实测地形构建不规则三角网生成DEM模型,在遇到特殊地形时将方格网进行自动切割,同时通过模型自动获取各方格网点的高程,再对分割好的格网进行土方计算。实例表明该方法提高了方格网法土方计算的精度。
The calculation of earthwork is carried out by the grid method. The results are intuitive and it is convenient for customers to check the calculation results. However, the calculation accuracy of the conventional grid method can not be effectively guaranteed, especially in the case of special terrain (such as large scarps, slopes Through the grid), there is a big error in the calculation results. To this end, this paper designs an improved calculation method, based on the measured terrain measured irregular terrain network to generate DEM model, in the face of special terrain when the grid automatically cut, while the model automatically get the grid Network elevation, and then split the grid for earthwork calculation. The example shows that this method improves the accuracy of the earthwork calculation of the grid mesh method.