激光扫描技术在土方量计算中的应用及精度分析

土方量计算的方法有方格网法、断面法、等高线法、数字高程模型(DEM)方法等,本文提出一种利用激光扫描获取海量数据生成不规则三角网(TIN)来计算土方量的方法,介绍其作业方法、地形数据提取、土方量计算等。在实际工程中,用不同方法计算出来的土方量会存在差别,哪种计算方法的精度更高,通过精度分析得出相应结论。

Application of Laser Scanning technology in Earthwork Calculation and Precision Analysis

There are several methods for earthwork calculation in civil engineering,such as grid,cross-section,contour and Digital Elevation Model(DEM).This paper presents a new access to calculate the earthwork.The idea is calculating the earthwork by triangulated irregular network(TIN) which is generated with huge amounts of data acquired by laser scanning.The workflow,terrain data extraction and earthwork calculation of the new technology is introduced in this paper.Actually,the results are different when using different methods.The corresponding results show that which method has higher accuracy by precision analyzing.