轨道控制网(CPⅢ)三角高程测量精度研究-《高速铁路技术》

文章信息/Info

Title:: A Study on the Precision of Trigonometric Leveling for Track Control Network (CPⅢ)

Author(s):: LIU Ming; China Railway Chengdu Group Co., Ltd., Chengdu 610051, China

Keywords:: triangle elevation|free stationing|vertical axis deviation angle|CPⅢ|adjustment

摘要:: 在CPⅢ高程控制网测量中，全站仪三角高程测量具有效率高、成本低的优势，但因同边高差较差往往无法满足规范要求，其在CPⅢ高程控制测量中的应用受到了限制。本文通过对CPⅢ三角高程测量方法的研究及全站仪竖轴倾斜误差对高差影响的分析，提出了通过三角高程同边多次观测高差取平均消除误差影响的方法。并通过工程实测数据对比了全站仪三角高程与水准高程，统计了全站仪高程平差精度，验证了采用本文数据处理方法的全站仪三角高程测量成果能够满足规范要求。同时，本文根据CPⅢ三角高程测量方法和成果，对现有规范提出了放宽同边高差较差指标的建议，以期能促进三角高程测量技术在CPⅢ测量中的应用。

Abstract:: In the CPⅢ vertical control network survey, trigonometric leveling by the total station is of high efficiency and low cost, but its application in the CPⅢ vertical control survey is limited because of the poor elevation difference on the same side, which often cannot meet the specification requirements. Based on the study of CPⅢ trigonometric leveling method and the analysis of the influence of the vertical axis tilt error of total station on the elevation difference, this paper puts forward a method to eliminate the influence of error by averaging the elevation difference observed by using trigonometric leveling many times on the same side. The trigonometric leveling by the total station is compared with level elevation by engineering measured data, and the adjustment accuracy of total station elevation is counted, which proves that the trigonometric leveling results of the total station using the data processing method in this paper can meet the specification requirements. At the same time, according to the methods and achievements of CPⅢ trigonometric leveling, this paper puts forward some suggestions to relax the difference index of the same side elevation difference for the existing specifications, in order to promote the application of trigonometric leveling technology in CPⅢ surveying.