盾构隧道贯通接收前的控制测量复核

Review of Control Survey of Shield Tunnel Before Penetration Reception

以厦门地铁2号线东孚车辆段出入段线区间工程为背景,为确保盾构机的顺利接收,提高盾构隧道贯通精度,在各项控制测量计算、观测工作中,根据所用的控制测量中误差值和累积误差值的比较,进行计算分析,选用精度更优的测量结果,作为盾构接收的控制基准。经贯通测量复核后得出结果,横向贯通误差为-18.8mm,高程贯通误差+2.4mm,符合验收规范要求。

The paper is based on the entrance and exit section project ofDongfu Depot ofXiamenMetro Line 2.In order to ensure the smooth reception of shield tunnelingmachines and improve the accuracy of shield tunnel penetration,in various control measurement calculations and observation work,based on the comparison of error and cumulative error values in the control measurement used,calculation and analysis are carried out.A measurement scheme with better accuracy is selected as the control benchmark for shield tunneling reception.After rechecking through the penetration measurement,the results showed that the lateral penetration error was-18.8 mm,and the elevation penetration error was+2.4mm,whichmeets the acceptance specification requirements.