介绍了在沉管隧道施工中，实时监测沉管沉放的一种测量方法。
A surveying method of real time monitoring for immersed tube was introduced.
最后通过模拟试验进行验证，得出了该模型能够满足管段沉放测量要求的结论。
Finally, a simulation test to verify that the model can be suitable for measurement required in the process of tube sinking.
分析了对接面与管段中心线夹角误差对沉放后线路位置的影响，提出了控制隧道轴线偏差的措施；
This paper also presents a method to solve the tunnel axis displacement on line caused by angle error between tube center axis and datum of joint.
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