浅埋下穿隧道上部建筑物安全监测实践

Safety Monitoring Practice of the Upper Buildings in Shallow Buried Tunnel

为了确保下穿隧道施工时上部建筑物的安全稳定,需要对建筑物的变形进行监测,通过监测结果来反馈与指导施工,直至所采用的施工方案能确保建筑物的安全。针对福州至平潭铁路岱岭隧道下穿福州外语外贸学院隧道工程,使用精密水准仪对上部建筑物进行沉降监测;使用全站仪对上部建筑物进行倾斜监测。通过为期四个月的共22次的观测得到建筑物最大累计沉降为4.3mm,在后期监测时出现上升现象,致使最终累计沉降为3.5 mm;隧道开挖之前建筑物已存在最大倾斜0.268%,在隧道开挖后倾斜最大增加值为0.147%。

In order to ensure the safety and stability of the upper buildings during the tunnel construction, it is necessary to monitor the deformation of the building. Through the monitoring results to feedback and guide the construction, until the use of the construction program can ensure the safety of the building. During the tunnel engineering of Fuzhou College of Foreign Studies and Trade and the tunnel is on the railway in Dailing from Fuzhou to Pingtan, the precision level was used to monitor the settlement of the upper building and the total station was used to monitor the inclimation of the upper buildings. The maximum cumulative settlement of the building was 4.3 mm by a total of 22 observations over a period of four months. In the later period of monitoring, there was a rising phenomenon, resulting in the final cumulative settlement of 3.5mm. The maximum inclination of the building was 0. 268% before the tunnel excavation, and the maximum increase in inclination after excavation was 0. 147%.