轨道下沉试验数据误差修正方法的比较研究

摘要

Research purposes:The data obtained from the field experiment can't be directly used for the statistics and analysis,so that it must go through some necessary data preprocessing first.Through the error correction of the measured data,it can provide more accurate and reliable track settlement data for the follow-up data analysis.In this paper,the basic principle and practical way of reference point correction method and error plane correction method are introduced.Then the two methods were used to revise the track settlement data that obtained from field experiments respectively.Finally the results that obtained from the two methods are compared and analyzed.Research conclusions:(1) Both of the two error correction methods can effectively modify the height measured data in some extent.(2) The reference point correction method has concise thinking and quick calculation,and has no additional requirements to the field experiments,but can't reflect the difference of the error correction value between different observation points.(3) The error plane correction method has solved the problem that the different observation points have different error correction values,the calculating result is more accurate,but the calculation is complex,and also proposes additional requirements to the field experiments.(4) Comprehensively,the error plane correction method is better than the reference point correction method.(5) The research results can be applied to the error correction of the track settlement data obtained from the field experiment.%研究目的:通过轨道下沉与高低不平顺恶化关系现场试验测量得到的数据不能直接用于后续的统计与规律分析,而必须先经过一些必要的数据预处理.测量数据经过误差修正后,可以为后续数据分析提供更为精确可靠的轨道沉降数据.本文通过介绍基准点修正法和误差平面修正法的基本原理与实现思路,分别利用这两种误差修正方法对现场试验所得的轨道下沉数据进行数据修正,以比较由这两种误差修正方法得到的不同的数据修正效果.研究结论:(1)两种误差修正方法都能在一定程度上有效地修正高程测量数据;(2)基准点修正法思路简明,计算快捷,对现场试验条件没有额外要求,但不能反映出不同观测点之间的误差修正值的差异性;(3)误差平面修正法解决了误差修正值差异性的问题,计算结果更精确,但计算复杂,同时对现场试验条件提出了额外要求;(4)综合来看,误差平面修正法优于基准点修正法;(5)该研究成果可应用于由现场试验得到的轨道下沉数据的误差修正方面.