高速铁路CPⅢ平面网复测稳定性判定标准的探讨  

An Approach to Stability Criterion for CPⅢ Plane Network Resurveying of High Speed Railway

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：《铁道标准设计》2016年第9期56-58,共3页Railway Standard Design

摘　　要：基于CPⅢ平面网独有的构网特点,利用参数平差法和协方差传播律,给出CPⅢ平面网复测稳定性判定标准及其严密的计算式,并在此基础上模拟CPⅢ平面网观测数据予以分析,据此确定CPⅢ平面网复测与原测成果的X、Y坐标较差≤±4 mm,且相邻点的复测与原测坐标增量ΔX、ΔY较差≤±2.5 mm。从理论上严密给出高速铁路CPⅢ平面网复测稳定性判定标准,希望能为正在修订的高速铁路工程测量规范所采纳。Based on the unique characteristics of CPⅢ plane network, the stability criterion for CPlU plane network resurveying as well as its rigorous precision calculation formula are derived from parameter adjustment and variance-covariance propagation law and a simulation test of CP Ⅲ plane network is performed on the basis. The results show that the coordinate difference in X and Y is less than ±4 mm and coordinate increment difference in X and Y is less than ±2. 5 mm between resurveying result and original survey one. The precision stability criterion for cPm plane network resurveying is defined theoretically, which is expected to be adopted in the emended specification for engineering survey of high speed railway.

关 键 词：高速铁路 CPⅢ平面网 复测 稳定性判定标准 

分 类 号：U238[交通运输工程—道路与铁道工程] U212.24