轨道精调中后方交会点三维严密平差方法研究

Study on Three-dimensional Strict Adjustment Method of Space Resection for Precise Positioning Track

研究目的:目前采用的自由设站后方交会点三维坐标计算,是把平面和高程坐标分开分别进行的,这在理论上存在一定的不严密性。针对这一问题,本文在介绍无砟轨道精调方法的基础上,就精调中自由测站后方交会点三维坐标计算问题进行研究。研究结论:以全站仪自由设站三维后方交会的斜距、水平方向和天顶距为原始观测值,推导了三维后方交会点坐标严密平差计算的数学模型,并通过实验数据验证了模型的正确性和合理性,提高了自由测站后方交会点三维坐标计算的精度,有利于高速铁路轨道平顺性的提高,可在无砟轨道精调中推广使用。

Research purposes： The existing computation process of three - dimensional space resection for track adjustment is made in the way of separating planar with elevation theoretically strict, so the study is done in this paper on this issue. coordinate determination of determination, which is not Research conclusions： The improved mathematical model is established on the base of slope - distance, horizontal direction and zenith angle as observations collected by free stationing of total station. The testing data shows that the model is effective and reliable and with this method the accuracy of track positioning can be greatly improved and the regularity of track can be enhanced, so the research result can be widely used in ballastless track adjustment.