高速铁路CPⅢ三角高程网构网与平差计算方法  

Construction and Adjustment Method for CPⅢ Trigonometric Leveling Network of High-Speed Railway

作　　者：刘成龙[1] 杨雪峰[1] 卢建康[2] 何波[1] 

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都610031 [2]中铁二院工程集团有限责任公司,四川成都610031

出　　处：《西南交通大学学报》2011年第3期434-439,450,共7页Journal of Southwest Jiaotong University

基　　金：铁道部科技项目(铁建科字2009-16)

摘　　要：为提高高速铁路CPⅢ高程控制网的建网效率和精度,提出采用与平面控制网同步测量、基于差分法构建CPⅢ三角高程网的建网新方法.这种方法根据间接高差与直接观测量的误差传播关系进行定权,依据观测值及其权重建立数学模型,通过间接平差方法计算精确的CPⅢ控制点高程.基于该算法开发了相应的数据处理软件,并将软件用于实例分析.结果表明,该方法求得的高程与水准高程的高程较差落入[-3 mm,3 mm]区间的概率为99.40%,用该方法构建的CPⅢ三角高程网代替CPⅢ水准网仍然可满足CPⅢ高程网的精度要求.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 result 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 

分 类 号：P224.2[天文地球—大地测量学与测量工程]