地铁隧道施工中平面联系测量方法实践与结果分析
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摘要
地铁施工通常采用联系测量将平面位置引入地下,常用的"一井定向"与"双井定向"在控制地下导线精度上有所不同,本文对两种测量方法及其平差过程进行分析,研究导线方位角误差和距离误差的计算方法,结合工程实例,分别计算两种方法测得地下导线的方向误差和里程误差。通过对结果进行对比分析,得出两者测得的导线里程方向的误差相差不大,但"一井定向"的方位角误差比"双井定向"大的结论。
Metro construction usually uses contact measurement to introduce the plane position into the ground.The commonly used "one-shaft orientation"and "two-shaft orientation"are different in controlling the accuracy of the underground points.This paper analyzed the measurement methods and the difference process of the two methods,which studied the calculation methods of azimuth error and the the mileage direction error.Combined with the engineering examples,the direction error and the mileage error of two methods were calculated.By the comparing and analyzing of the results,it is concluded that the errors in the direction of the mileage measured by the two methods are not much different,but the azimuth error of "one-shaft orientation"is larger than that of "two-shaft orientation".
Metro construction usually uses contact measurement to introduce the plane position into the ground.The commonly used "one-shaft orientation"and "two-shaft orientation"are different in controlling the accuracy of the underground points.This paper analyzed the measurement methods and the difference process of the two methods,which studied the calculation methods of azimuth error and the the mileage direction error.Combined with the engineering examples,the direction error and the mileage error of two methods were calculated.By the comparing and analyzing of the results,it is concluded that the errors in the direction of the mileage measured by the two methods are not much different,but the azimuth error of "one-shaft orientation"is larger than that of "two-shaft orientation".
引文
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[2]成枢,武光耀,纪萍.地铁隧道贯通测量方法的改进与精度分析[J].测绘通报,2017(1):118~121.
[3]周晓卫,匡志威,刘鹏程等.导线传递法在地铁平面联系测量中的应用[J].城市勘测,2013(6):159~162.
[4]马全明.城市轨道交通工程精密施工测量技术的应用与研究[J].测绘通报,2010(11):41~45.
[5]赵吉先,万程辉.贯通横向误差处理新方法的探讨[J].测绘通报,2008(1):10~12.
[6]李军.竖井定向联系测量新方法的应用研究[J].测绘通报,2005(8):44~46.
[7]李全海,王国海.横向贯通误差的估计[J].工程勘察,1996(1):63~65.
[8]武汉大学测绘学院测量平差学科组.误差理论与测量平差基础[M].武汉:武汉大学出版社,2003.