地铁施工平面控制网中垂线偏差改正研究  

Corrections of vertical deflection in the horizontal control network of subway

作　　者：李世烜 陈晓飞 刘杰 Li Shixuan;Chen Xiaofei;Liu Jie(China Nuclear Industry Survey Design&Research Co.,Ltd.,Zhengzhou 450002,China;Henan Polytechnic University School of Surveying and Land Information Engineering,Jiaozuo 454000,China)

机构地区：[1]中核勘察设计研究有限公司,郑州450002 [2]河南理工大学测绘与国土信息工程学院,河南焦作454000

出　　处：《工程勘察》2024年第9期55-59,76,共6页Geotechnical Investigation & Surveying

基　　金：国家自然科学基金面上项目,红河断裂带现今分段运动特征及其动力学机制的GPS精化研究(41774041)。

摘　　要：本文运用EGM2008地球重力场模型计算垂线偏差的南北分量和东西分量,利用公式分别推导出垂线偏差分量对观测边水平方向和水平距离的影响规律,进一步研究垂线偏差对地铁盾构横向贯通误差的影响。并结合郑州市某地铁的工程实际情况,分析垂线偏差对地铁施工平面控制网和横向贯通误差的影响规律。结果表明,垂线偏差对水平方向的影响与定向边垂直角有关,随垂直角的增大而增大;垂线偏差对水平距离的影响与两点之间的高差有关,随高差的增大而增大;同时,当定向边垂直角较大时,垂线偏差也会对横向贯通误差造成较大影响。The north and east components of vertical deflection are calculated by means of EGM2008 earth gravity field model,and the influence of vertical deflection on the lateral penetration error of subway shield is further studied.Based on the actual engineering situation of a metro in Zhengzhou City,the effect of vertical deflection on the horizontal control network and transverse through error are analyzed.The results show that the influence of the vertical deflection on the horizontal direction is related to the vertical angle of the backsight and becomes larger with the increase of the vertical angle.The influence of vertical deflection on horizontal distance is related to the height difference between two points and increases with the height difference.At the same time,when the vertical angle of the backsite is large,the vertical deflection will also have a greater impact on the transverse transfixtion error.

关 键 词：垂线偏差 EGM2008 平面控制网 贯通误差 

分 类 号：U231[交通运输工程—道路与铁道工程]