地铁工程是穿梭于城市各大交通要道和人口密集区的大型地下轨道交通工程,大大的缓解了地上交通的压力。也正是因为这个特点,在城市地铁建设的过程中,将会穿越各种构建筑物基础及市政管线,并对其产生不利的影响,其中便包括城市桥梁。为保证城市桥梁在地铁施工穿越过程中的安全性,需对既有桥梁进行变形监测,本文就地铁施工穿越既有桥梁的监测要点进行讨论。 Subway project is shuttling in the city’s major thoroughfares and densely populated areas of large-scale underground rail transit project, greatly ease the pressure on the ground traffic. It is also because of this feature that urban metro construction will cross and adversely affect various foundations and municipal pipelines, including urban bridges. In order to ensure the safety of urban bridges during subway construction, deformation monitoring of existing bridges is required. This paper discusses the monitoring points of subway construction crossing existing bridges.