基于改进数字高程模型的架空线路杆塔基础土方量计算方法研究

Research on Calculation Method of Earthwork of Pole TowerFoundation of Overhead Line Based on Improved DigitalElevation Model Method

架空输电线路建设工程中,杆塔基础土方量计算影响着工程经济效益和施工工期,因此,需要选取合适的土方量计算方法。本文中首先分析了断面法、方格网法、等高线法和数字高程模型(DigitalElevationModel,DEM)法4种方法,并采用花授粉算法(FlowerPollinationAlgorithm,FPA)对传统DEM方法进行改进。将5种不同的方法运用到实际案例中比较不同方法的适应地形及计算精度。结果表明,改进后的DEM法可以获得X、Y、Z轴上的最优分割网格数量,适用地形范围最广、计算精度最高,计算速度相较于传统DEM法也有提高。

In the construction of overhead transmission lines,the calculation of earthwork of pole tower foundation affects the economic benefits and construction period of the project,so it is necessary to select the appropriate calculation method of earthwork.In this pa-per,four methods of section method,grid method,contour method and Digital Elevation Model(DEM)method are firstly analyzed,and Flower Pollination Algorithm(FPA)is used to improve the traditional DEM method.Five different methods are applied to actual cases to compare their adaptability to terrain and calculation accuracy.The results show that the improved DEM method can obtain the optimal mesh number at X,Y and Z axes,and has the widest application range and the highest calculation accuracy.Compared with the traditional DEM method,the calculation speed is improved.