地铁隧道沉降监测及基准点稳定性分析

Subsidence Monitoring in Metro Tunnel and Stability Analysis of Datum Points

该文论述了地铁隧道保护区沉降监测基准网的构成、布设形式以及平差基准的选取,对沉降监测点、隧道与车站交接处监测点的布设及观测作了简单介绍,讨论了稳定性矩阵分析在隧道基准网中的应用以及不稳定点位移的计算。结合南京地铁一号线玄武门站～新模范马路站隧道监测实例,论证了稳定性矩阵分析的正确性及可行性。

This paper discusses the structure,layout type of subsidence monitoring datum network and selection of adjustment datum in metro tunnel protection zone,simply introduces the layout and observation of subsidence monitoring points and the junnction points of tunnel and station,and discusses the application of stability matrix analysis method in tunnel datum network and calculation of unstable points displacement.Combined with tunnel monitoring in Xuanwumen station ～ Xinmofan road station of Nanjing metro No.1 line,it proves that the stability matrix analysis method is correct and feasible.