高速铁路CPⅢ平面网的闭合差研究及其应用  

Research and Application of Closure for High Speed Railway CPⅢ Plane Network

作　　者：王国昌[1] 徐小左[2] 刘成龙[2] 

机构地区：[1]中铁二院工程集团有限责任公司测绘分院,四川成都610031 [2]西南交通大学土木工程学院,四川成都610031

出　　处：《铁道学报》2009年第5期79-83,共5页Journal of the China Railway Society

基　　金：铁道部科技研究开发计划(2008G031-16)

摘　　要：CPⅢ平面网精度要求高、外业观测的数据量大。如何评定CPⅢ平面网外业观测数据的精度,以及如何进行CPⅢ平面网外业观测数据的粗差探测,是CPⅢ网理论研究和测量实践的重要内容之一。本文在充分研究CPⅢ平面网网形特点的基础上,提出CPⅢ网纵横向闭合差的概念,并推导CPⅢ网纵横向闭合差限差的计算模型。通过模拟计算,确定了CPⅢ网纵横向闭合差极限误差的建议值,并据此进行CPⅢ网外业观测数据中是否含有粗差的检核。剔除并重测含有粗差的外业观测数据,可以有效提高CPⅢ网的可靠性和精度。本文的研究成果,对CPⅢ平面网测量及相关测量规范的制定和完善有参考价值。The CPⅢ plane network has the characteristics of high precision as well as large amounts of field observation data. So how to evaluate the precision and detect the gross error of field observation data for the CPⅢ plane network is one of the important contents in theoretical study and practice of measurement for the CP Ⅲ plane network. On the basis of being acquainted with the characteristics of the CPⅢ plane net form, the paper presents the concept of the longitudinal and lateral closure for the CPⅢ network and derivation of the calculation model for the tolerance of the CPⅢ longitudinal and lateral closure. The paper also discusses how to properly determine the tolerance of the longitudinal and lateral closure for the CPⅢ network by analog calculation to realize effective inspection in detecting the gross errors of field measurement in the CPⅢ network with the method of closure, then eliminates and resurveys field measurement with gross errors to improve the precision and strengthen reliability of the CPⅢ network. The research provides a reference for formulation and revision of the specifications for the CPⅢ plane network and related measurement.

关 键 词：CPⅢ平面网 纵横向闭合差 限差 粗差探测 

分 类 号：U212.24[交通运输工程—道路与铁道工程]