高铁CPⅢ复测高程和相邻点高差较差限差的确定  

Determination of Divergence Tolerance of Elevation and Altitude Difference between Adjoining Points of High Speed Railway with CPⅢ Network

作　　者：徐小左[1] 

机构地区：[1]中铁第一勘察设计院集团有限公司,西安710043

出　　处：《铁道工程学报》2010年第10期45-48,共4页Journal of Railway Engineering Society

摘　　要：研究目的:CPⅢ高程网对保证高速铁路无砟轨道高程方向上的静态平顺度具有至关重要的作用。为了确保其测量结果的可靠性,常需进行复测,而目前高铁CPⅢ复测高程和相邻点的高差较差限差一般是基于大量的统计数据给出的,并非经过严密的理论推导。因此,研究CPⅢ复测高程和相邻点高差较差的严密估算原理,对保证在建高铁CPⅢ高程网的建网、复测成果的可靠性具有重要的意义。研究结论:按间接平差原理推导了CPⅢ高程网复测高程和相邻点高差较差限差的严密估算模型。并依据该模型,对按德国中视法和中国矩形法施测的CPⅢ高程模拟网进行了仿真计算,其结果与现有高速铁路工程测量规范关于CPⅢ高程网复测高程和相邻点高差较差限差的规定相吻合,为高速铁路工程测量规范有关CPⅢ高程网复测高程和相邻点高差较差限差的规定提供了理论支撑。Research purposes： CPⅢ vertical control network plays an important role in ensuring the vertical static regularity of the ballastless track of high-speed railway.It often needs repeated measurement in order to assure the reliability of the measurement results.However,the divergence tolerance of elevation and altitude difference between adjoining points of high-speed railway with CPⅢ is generally determined on the basis of large amount of statistic data,other than rigorous theoretic derivation.So the research on principle of rigorous estimation of divergence tolerance of elevation and altitude difference between adjoining points of high-speed railway with CPⅢ is significant to assuring establishment of CPⅢ vertical control network and reliability of the measured data for high-speed railway.Research conclusions：According to the principle of the square difference,the model for the divergence tolerance of elevation and altitude difference between adjoining points of high-speed railway with CPⅢ was derived.And with this model,the simulated calculation was done for the analogue CPⅢ vertical control network measured with German surveying method and China rectangle surveying method and its result was consistent with the specification of divergence tolerance of elevation and altitude difference between adjoining points of high-speed railway with CPⅢ stipulated in the current code for engineering survey of high-speed railway.The research result provides theoretical basis for the specification of divergence tolerance of elevation and altitude difference between adjoining points of high-speed railway with CPⅢ.

关 键 词：高速铁路 CPⅢ高程网 复测高程和相邻点高差较差 仿真计算 

分 类 号：U212.24[交通运输工程—道路与铁道工程]