青岛地铁3号线某区间隧道拱顶沉降测量方法选择与精度分析

Vault Settlement Discussions and Precision Analysis of Metro Line 3 of Qingdao Tunnel Monitoring Work

结合青岛地铁3号线某区间隧道监测工程,研讨拱顶沉降的测量方法、精度和注意事项,以备不同地质条件下不同支护结构隧道工程对于拱顶沉降监测方法的选择。在接触量测中,因瓦挂尺和挂钩塔尺的使用提高了工作效率。在能将竖直角和距离控制在一定范围内的条件下,全站仪三角高程的方法同样适用于隧道拱顶沉降的量测,并且能够大幅度的降低作业强度,提高工作效率。

This paper introduces Monitoring of tunnel engineering of Metro Line 3 of Qingdao,and considers vault settlement methods of measurement,precision analysis and notes,for the purpose of the selection of methods of monitoring crown settlement under different geological conditions and different tunnel support structure.In the contact measurement,the use of invar hanging ruler and hook foot tower improves the work efficiency.With vertical angle and distance under control in a certain range,the trigonometric leveling method can also be applied to the tunnel crown settlement measurement.It can greatly reduce the work intensity,and improve work efficiency.