Cass软件土方量计算及两期土方量计算方法精度分析

Accuracy Analysis of Earthwork Calculation Methods and Earthwork Calculation in Two Periods Calculation Method in Cass Software

阐述了Cass软件5种计算土方量方法使用时应注意的事项,以Cass软件方格网法与DTM法两期土方量计算原理及过程为依据,对两个实际工程案例完成两期土方量计算并进行结果精度比较,当方格网法格网宽度逐渐变小时,与DTM法的计算结果互差及相对误差率逐渐减小。实际工程中,为确保准确性,两种方法可以进行结果互检。进行外业数据采集时,为提高土方量计算精度,要尽可能反映地势起伏情况,两期数据采集的范围尽可能保持一致。

The study expounds 5 kinds of calculation methods of earthwork quantity in Cass software.Based on the principle and process of two-stage earthwork calculation by Cass software grid method and DTM method,the accuracy of two-stage earthwork calculation results by two methods in two actual engineering cases is compared.When the width of the grid becomes smaller and smaller,the result difference and relative error rate between the grid method and DTM method become smaller and smaller.In practical engineering,in order to ensure the accuracy,the two methods can be used to check each other’s results.In order to improve the accuracy of earthwork calculation,it is necessary to reflect the relief as far as possible,and the range of the two periods of data collection should be consistent as possible.