隧道净空收敛非接触量测方法及其精度分析  

Analysis of Non-contact Measurement Method and Accuracy of Tunnel Clearance Convergence

作　　者：徐孟强 杜强 桑圣华 Xu Mengqiang;Du Qiang;Sang Shenghua(China Design Group Co.,Ltd.,Nanjing 210000,China)

机构地区：[1]华设设计集团股份有限公司,江苏南京210000

出　　处：《城市勘测》2021年第4期132-134,138,共4页Urban Geotechnical Investigation & Surveying

摘　　要：对边测量、任意定向法是隧道净空收敛非接触量测的有效方法,采用误差传播理论推导了两种方法测量净空收敛中误差计算公式,结合工程案例验证,得出两种方法测量收敛测线长度精度相当,理论精度均满足《铁路隧道监控量测技术规程》净空变化测试精度0.5 mm~1.0 mm的精度要求。The opposite side measurement and arbitrary orientation method are effective methods for non-contact measurement of tunnel clearance convergence.According to the error propagation theory,the calculation formulas of the mean square error of the convergence of the two methods are derived.Combined with the engineering case,it is verified that the accuracy of the convergence line length measured by the two methods is equivalent.The theoretical accuracy of the two methods can meet the accuracy requirement of 0.5mm~1.0mm for the clearance test accuracy of the Technical Specification for Railway Tunnel Monitoring and Measurement.

关 键 词：净空收敛 非接触量测 对边测量 任意定向 精度 

分 类 号：P207[天文地球—测绘科学与技术] P258