GPS在桥梁与隧道工程中拟合模型实例分析

Analysis on the Fitting Model Instance of GPS in Bridge and Tunnel Engineering

本文结合工程实例数据对比分析两种方法,通过拟合结果可知:当纵横向跨度比较小、地形变化比较平缓时,对于两种拟合方法来说,通常情况下都可以达到三等水准精度;但是三次样条拟合法不适应测区较大、地形条件变化比较复杂的情况,对于移动曲面拟合法来说,通常能够达到等外水准要求,进而在一定程度上满足桥梁工程、隧道工程的施工需要。

Combined with engineering instance data, this paper contrasts and analyzes two methods. Through the fitting results, it is known that when the vertical and horizontal span is small, the terrain change is flat, the two fitting methods can achieve the third level accuracy under normal conditions, but the cubic spline fitting method don＇t suit the conditions of large surveyed area and complex changes of topographic conditions. For moving curved surface fitting, it is usually able to meet the requirements of substandard level, and meet the construction needs of the bridge engineering and tunnel engineering in a certain extent.