基于垂线偏差改正的隧道横向贯通误差计算研究  

Study on the tunnel transverse penetration error based on the vertical deflection correction

作　　者：李杨 游为 田子钰 展迪 刘文肖 宋健[3] Li Yang;You Wei;Tian Ziyu;Zhan Di;Liu Wenxiao;Song Jian(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 610097,China;Guangxi Xijiao Rail Transit Industrial Technology Research and Development Co.,Ltd.,Nanning 530000,China;China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,成都610097 [2]广西西交轨道交通产业技术研发有限公司,南宁530000 [3]中铁二院工程集团有限责任公司,成都610031

出　　处：《工程勘察》2024年第10期77-83,共7页Geotechnical Investigation & Surveying

摘　　要：针对《高速铁路工程测量规范》中对隧道洞内外水平方向值不做垂线偏差改正的问题,本文给出一种考虑垂线偏差改正计算隧道横向贯通误差的方法。根据布设于某地区全长约13km的模拟隧道控制网实测数据,分别采用GNSS(Global Navigation Satellite System)水准测量法与地球重力场模型法计算测区垂线偏差值,并利用误差传播定律推导由重力场模型所计算的垂线偏差分量中误差。采用基于不同方法计算出的垂线偏差值对实验网进行垂线偏差改正,对比分析实验网Y坐标闭合差和隧道横向贯通误差等指标。研究表明,洞内导线测量受垂线偏差的影响极小,无需进行垂线偏差改正;利用GNSS水准测量法和地球重力场模型计算的垂线偏差值对进洞联系边水平方向测量值进行改正,两种方法均能在一定程度上减小隧道横向贯通误差,且GNSS水准测量方法优于部分地球重力场模型,而EGM2008模型的效果最优。建议在隧道工程测量中,垂线偏差改正值超过0.5″的水平方向值应顾及垂线偏差改正。In view of the problem that the vertical deviation correction is not made for the horizontal values inside and outside the tunnel in the code for engineering survey of high speed railway,this paper presents a method to calculate the transverse penetration error of the tunnel by considering the vertical deflection correction.According to the measured data of the simulated tunnel control network with a total length of about 13km,the GNSS(Global Navigation Satellite System)leveling method and the Earth gravity field model method are respectively used to calculate the vertical deflection value of the survey area,and the mean square error of the vertical deflection component calculated by the gravity field model is derived by using the error propagation law.The vertical deflection value calculated based on different methods is used to correct the experimental network,and the Y-coordinate closure error of the experimental network and the transverse penetration error of the tunnel are compared and analyzed.The research shows that the traverse in the tunnel is very little affected by the vertical deflection,and there is no need to correct it.The vertical deviation value calculated by GNSS leveling method and Earth gravity field model is used to correct the measured value in the horizontal direction of the connecting side of the tunnel.Both methods can reduce the transverse penetration error of the tunnel to a certain extent,and GNSS leveling method is better than some Earth gravity field models, while EGM2008 model has the best effect. It is suggested that in the tunnel engineering survey, the vertical deflection correction should be taken into account when its value exceeds 0. 5″ in the horizontal direction.

关 键 词：垂线偏差 地球重力场模型 水平方向改正数 横向贯通误差 

分 类 号：P223[天文地球—大地测量学与测量工程] P258[天文地球—测绘科学与技术]