隧道GPS网横向贯通误差的计算

CALCULATION OF LATEKAL ERROR OF PIEKRING IN TUN-NEL GPS NETWORK

隧道工程是铁路、公路建设不可缺少的一部分，用ＧＰＳ建立隧道施工控制网具有速度快、精度高、费用低等优点，如何计算隧道ＧＰＳ网对横向贯通误差的影响是非常重要的，本文在给出隧道ＧＰＳ网横向中误差影响值的计算公式的基础上，提出了一套ＧＰＳ用于隧道工程相应的数据处理方法并进行了实例计算。

Tunnel engineering is a necessary part in the railway and highway constructions.The tunnel construction network established by using GPS has the advantages of high speed,high precision and low expenses.The calculation about the influence of tunnel GPS networkto the lateral error of piercing is very important.Basing on the conducted formula of tunnelGPS lateral mean square error of piercing,the authors present one set of data processingmethod about GPS used in tunnel engineering,and give a calculating example in the practicalengineering.