顾及对中误差影响的洞内导线网精度仿真计算方法研究  

Studies of Simulation Calculation of In-Tunnel TraverseNetwork Accuracy Considering Centering Error

作　　者：杨雪峰 刘成龙 刘志 何金学[3] YANG Xuefeng;LIU Chenglong;LIU Zhi;HE Jinxue(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610083,China;China Railway First Survey and Design Institute Group Co.,Ltd.,Xi′an 710043,China)

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都611756 [2]中铁二院工程集团有限责任公司,四川成都610083 [3]中铁第一勘察设计院集团有限公司,陕西西安710043

出　　处：《测绘与空间地理信息》2021年第10期38-42,45,共6页Geomatics & Spatial Information Technology

基　　金：中国铁建股份有限公司科技研发计划项目(2019-A02);中铁第一勘察设计院集团有限公司2019年度科研项目(院科川藏19-31);国家自然科学基金项目(51178404)资助。

摘　　要：各种形式的导线网是长大隧道洞内平面控制测量的主要方法,但是导线测量精度不可避免地会受到全站仪和棱镜对中误差的影响。以往的洞内导线网精度仿真计算均无法顾及对中误差的影响,本文提出通过在测站和棱镜点设计坐标中添加可控随机误差的方式,实现顾及测站点和棱镜点对中误差影响的洞内导线网精度仿真计算。通过对含有对中误差的导线网仿真观测数据的平差计算,验证了本文添加对中误差方法的正确性,说明了对中误差对于导线网精度仿真计算的重要性。本文介绍的方法,可用于长大隧道洞内平面控制网精度设计和横向贯通误差预计,是一种洞内导线网精度仿真计算技术的创新方法,值得在工程实际应用中推广。本文的仿真计算结果还表明,可以通过缩短洞内导线网点对间的横向距离减弱旁折光的影响。Traverse network is usually used to do the in-tunnel horizontal control surveying.However,its accuracy is inevitably affected by instrument centering errors from total station as well as prisms;and the traditional simulation calculation for the accuracy of in-tunnel traverse network didn′t considering the effect of centering error.In this paper,the authors proposed a method to add a controllable random error to the designed coordinates of both observation and prism stations,which taken the consideration of centering error and could be used to do the accuracy simulation calculation.The new method is verified by adjustment calculation of a test dataset which contains centering errors;and obviously,the centering errors should not be ignored.This new method could be applied to other related engineering projects for the design of in-tunnel horizontal control network accuracy and the predictions of transversal through error.The results of the simulation calculation also indicates that the lateral oscillation effects could be reduced by reducing the horizontal distance between traverse points.

关 键 词：对中误差 精度 仿真计算 导线网 旁折光 横向摆动 

分 类 号：P25[天文地球—测绘科学与技术] TB22[天文地球—大地测量学与测量工程]