西南交通大学学报2011，Vol.46Issue(3)：434-439,450,7.DOI:10.3969/j.issn.0258-2724.2011.03.013
高速铁路CPⅢ三角高程网构网与平差计算方法
Construction and Adjustment Method for CP Ⅲ Trigonometric Leveling Network of High-Speed Railway
摘要
Abstract
In order to establish CPⅢ vertical control network in high-speed railway with high efficiency and accuracy, a CPⅢ trigonometric leveling network method based on difference method was proposed, which was performed simultaneously during establishing the horizontal control network. In this method, a mathematical model of observation equations with weighted values, which are determined according to the error propagation relationship between indirect height difference and direct observations, is built, and the parameter adjustment method is used to obtain the accurate elevation values of CPⅢ control points. Then, a computing software based on the proposed algorithm was developed and tested in real application. The test resuh shows that the derived height from the proposed method, compared with the leveling height at the same point, has a confidence level of 99.40％ for tolerance interval of -3 to 3 mm. Therefore, using the CPⅢ trigonometric leveling network obtained by the proposed method to replace the CPⅢ leveling network can meet the accuracy requirement of CPⅢ vertical control network.关键词
CPⅢ三角高程网/数学模型/平差计算/精度评定Key words
CPII trigonometric leveling network/ mathematical model/ adjustment calculation/accuracy evaluation分类
天文与地球科学引用本文复制引用
刘成龙,杨雪峰,卢建康,何波..高速铁路CPⅢ三角高程网构网与平差计算方法[J].西南交通大学学报,2011,46(3):434-439,450,7.基金项目
铁道部科技项目(铁建科字2009-16) （铁建科字2009-16）
