受开挖爆破影响的立交隧道施工期振动监测

Vibration monitoring of overpass tunnel affected by excavation blasting

针对隧道交叉处爆破施工产生的振动可能成为主要安全隐患的问题,依托某立交隧道工程,在完成既有隧道衬砌质量探测和确定爆破危险源的基础上,对爆破开挖过程中的监测方法和监测内容进行研究,建立完整的爆破监测系统;完成对爆破振动监测测点的质点运动速度和主振频率监测与实测数据采集,确保既有隧道的安全。

Focusing on the vibration problem caused by blasting construction at the intersection of the tunnel,taking an overpass tunnel project as an example,the monitoring methods and contents in the process of blasting excavation are studied on the basis of completing the quality detection of existing tunnel lining and determining the blasting hazard sources.In order to ensure the safety of existing tunnels,the velocity of particle movement and the frequency of main vibration at the monitoring points of blasting vibration are monitored and the measured data are collected.