GPS高程拟合在公路工程中的应用

Application of GPS Height Fitting in Highway Engineering

传统水准测量的工作量和劳动强度大,使项目进展缓慢。如公路这样的线状工程,对交通运输、经济建设、区域发展起着至关重要的作用。国家的高速公路、一级公路、二级公路的路程都很长,为了避免巨大的劳动量,摆脱传统水准测量的局限性,GPS高程拟合应运而生。本文对高程拟合模型和方法进行了研究,并通过工程实例的2种方案来分析、比较和总结拟合方法的适用性。结果表明,内符合精度最高的是三次多项式曲线法,外符合精度最高的是Akima曲线法。

Traditional leveling makes the workload and labor intensity slow down the progress of the project.Linear projects such as highway play an important role in transportation,economic construction and regional development.National highway,first-class highway,second-class highway and distance are very long.In order to avoid huge labor and get rid of the limitations of traditional leveling,GPS height fitting came into being.This paper studies the height fitting model and method,and analyzes,compares and summarizes the applicability of the fitting method through two schemes of engineering examples.The results show that the cubic polynomial curve method has the highest internal coincidence accuracy and Akima curve method has the highest external coincidence accuracy.