后方交会法在地铁盾构施工控制测量中的应用

地铁盾构施工具有一次成洞、开挖横断面狭 窄、曲线半径小、距离较长等特点，对控制测量提出较 高的精度要求。结合工程实践，探索采用后方交会测 量方法进行地铁盾构施工测量，结果表明: 该方法不但 能提高隧道的贯通精度，解决地铁盾构施工一次成洞 对测量提出的高精度要求，还可以为后续地铁铺轨控 制测量、提高地铁线路的平顺性及地铁列车的乘坐舒 适性提供测量技术保障。

Resection method applied in the measurement of control of Subway shield tunnel

Subway tunnel construction features forming shapes in one time, narrow cross section, small curve radius, long distance, etc.. The control measure should be implemented with high accuracy. On the basis of engineering practice, the measurement method of resection for metro construction was explored. The results show that the method can improve the breakthrough precision of tunnel, meet the high precision requirement on measurement of forming a subway shield construction, well control subway track laying, ensure the smoothness of subway lines and improve comfort of taking subway trains.