CPⅢ平面控制网前后区段搭接方法应用与研究

Research on Lapping Methods in Front and Rear Sections for CPⅢ Plane Control Network

出于工期、成本和精度方面的考虑,高速铁路常常分为多个标段进行施工,作为无砟轨道控制基准的CPⅢ平面控制网自然也分为多个区段测量,因此,前后区段非常有必要进行数据搭接处理。本文研究了四参数转换法、余弦函数赋权法,并在此基础上提出基于四参数转换的余弦函数赋权法,结合具体工程实例,通过对比分析,显示了新方法在相邻区段的搭接效果。

For the time,cost and accuracy,high-speed railway is often divided into several tenders for the construction,as the CPIII plane of ballastless track control basic control network is divided into several sections of measurement,so it is very necessary to carry out section before and after data overlap processing.research on the four-parameter transformation method,the cosine weighting method based on cosine function with examples four parameter transformation based on weighting method,combined with the specific project example,through comparative analysis shows that the new method of overlap in adjacent section effect.