高速铁路基础平面控制网(CPI)复测数据处理研究

Study on Repeated Measurement Data Processing in Basic Plane Control Network( CPI) of High-speed Railway

高铁铁路基础平面控制网(CPI)贯穿于勘测、施工、运营维护,勘测、运营维护基础平面控制网(CPI)复测都是线路整网平差,施工阶段整网被分成几个标段,各标段独立处理。《高速铁路工程测量规范》要求,基础平面控制网(CPI)应采用框架控制网(CP0)点进行三维约束平差,联测框架(CP0)点总数不得少于3个,特殊困难条件下不得少于2个,实际情况1个标段最多也就1个框架(CP0)点。该文通过某客运专线基础平面控制网(CPI)复测数据处理研究,提出当标段只有1个框架(CP0)点时,采用1个框架(CP0)点和2个基础平面控制(CPI)点进行三维约束平差。

The basic plane control network（ CPI） of high-speed railway run through the surveying,construction and operation and maintenance. The whole network adjustment is used to basic plane control network（ CPI） repeatead measuring in the surveying and operation and maintenance stages,but the whole network is divided into several sections in the construction stage,each section is processed independently. Specification for survey engineering of high speed railway requires that the basic plane control network（ CPI） should use the frame control network（ CP0） point to carry out three-dimensional constraint adjustment. And the connection surveying of frame control network（ CP0） points need not less than three,and not less than two points under the special difficult condition. But at most one frame control network（ CP0） point in one section in the actual situation. This paper through studying the repeated measurement data in basic plane control network（ CPI） in a passenger dedicated line provides that when only one frame control network（ CP0） point in a section,the three-dimensional constraint adjustment is carried out by using one frame control network（ CP0） point and two basic plane control network（ CPI） points.