苏州轨道交通CPⅢ平面控制网仿真计算  

Simulation and calculation of horizontal CPⅢfor Suzhou rail transit

作　　者：徐峥 XU Zheng(China Railway Fifth Survey and Design Institute Group Company Limited,Beijing 102600,China)

机构地区：[1]中铁第五勘察设计院集团有限公司,北京102600

出　　处：《北京测绘》2023年第11期1561-1566,共6页Beijing Surveying and Mapping

基　　金：国家铁路局课题(KF2022-025);北斗卫星导航系统重大专项(030303020126)。

摘　　要：城市轨道交通轨道控制网(CPⅢ)是轨道铺设和运营维护的基准,具有测设精度高、多余观测数多、使用方便、控制点易保存等特点。本文分析了CPⅢ控制网测量误差来源,基于苏州轨道交通隧道贯通控制点施工成果与第三方成果差值的限差,推导了苏州轨道交通CPⅢ控制网起算点的中误差;根据苏州轨道交通盾构隧道限界图及实测CPⅢ数据、第三轮线网隧道洞径,构建了多种纵横向点对距离的苏州轨道交通CPⅢ仿真控制网;对仿真控制网进行间接平差计算,得出了隧道洞径增大可提高CPⅢ相邻点间的相对点位精度、CPⅢ点对纵向间距不宜超过80 m等结论,对苏州轨道交通CPⅢ控制网的布设、施测具有参考意义。The track control network(CPⅢ)for urban rail transit is the benchmark for track laying,operation,and maintenance,with features such as high survey accuracy,multiple redundant observations,convenient use,and easy storage of control points.This paper analyzed the sources of measurement errors in the CPⅢand derived the mean square error of the starting point of the CPⅢfor Suzhou rail transit based on the construction results and third-party results of the tunnel penetration control point for Suzhou rail transit.According to the clearance diagram of shield tunnels in Suzhou rail transit,measured CPⅢdata,and tunnel diameter of the third round of line network,a simulated CPⅢfor Suzhou rail transit with multiple vertical and horizontal point-to-point distances was constructed.Through indirect adjustment calculation of the simulation control network,it is concluded that increasing the tunnel diameter can improve the relative location accuracy between adjacent points of CPⅢ,and the longitudinal distance between CPⅢpoints should not exceed 80 m.The results are of reference significance for the layout and construction of the CPⅢfor Suzhou rail transit.

关 键 词：仿真计算 轨道交通轨道控制网(CPⅢ)控制网 间接平差 城市轨道交通 盾构隧道 

分 类 号：P258[天文地球—测绘科学与技术]