基于交叉导线网的隧道洞内测量新方法  

New Tunnel Measurement Method Based on Cross Traverse Network

作　　者：勾万祥 郑勇[1] 闫杰 徐彬 GOU Wanxiang;ZHENG Yong;YAN Jie;XU Bin(Institute of Geospatial Information,Information Engineering University,Zhengzhou 450001,China;96732 Troops,Shaoyang 422900,China)

机构地区：[1]信息工程大学地理空间信息学院,河南郑州450001 [2]96732部队,湖南邵阳422900

出　　处：《测绘与空间地理信息》2024年第10期207-211,共5页Geomatics & Spatial Information Technology

摘　　要：交叉导线网是隧道洞内控制网的常用网形,具有精度高、可靠性好等特点,但存在测量强度大、边角联合平差精度不理想等问题。在分析交叉导线网测距、测角观测量对联合平差精度影响基础上,结合工程实践提出了一种基于交叉导线网的洞内测量新方法,即单边测距交叉导线法。该方法避免了交叉导线网边角精度不匹配、测边测角网相对扭曲、测距内部定权不准等造成的联合平差精度不理想问题。仿真实验表明,该方法较传统方法各项贯通指标值更接近真实值;工程实践表明,采用该方法,横向贯通精度和贯通方位精度较传统方法分别提升51.5%、9.8%,且布网测量工作量减少约30%。Cross traverse network is a common type of control network in tunnel.It has the characteristics of high accuracy and good reliability,but it has some problems such as high measurement workload and poor accuracy of joint adjustment of edge and angle measurements.On the basis of analyzing the influence of cross traverse network distance measurement and angle measurement on the joint adjustment accuracy,a new method of cross traverse measurement based on cross traverse network is put forward in combination with engineering practice,namely unilateral distance measurement cross traverse method.This method avoids the problems of unsatisfactory joint adjustment accuracy caused by the mismatching of edge angle accuracy of cross wire network,relative distortion of edge and angle measurement network and inaccurate weight determination in distance measurement.Simulation results show that the proposed method is closer to the real values than the traditional method.Engineering practice shows that,compared with the traditional method,the horizontal holing through accuracy and holing through azimuth accuracy are improved by 51.5%and 9.8%respectively,and the network measurement workload is reduced by about 30%.

关 键 词：隧道控制测量 交叉导线网 贯通误差 精度 可靠性 

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]