下穿居民区隧道施工爆破振动控制的实践

Practice of Construction Blasting Vibration Control for Tunneling Under Residential Area

控制城市地下交通隧道的爆破振动,可以有效减轻对居民区建筑物产生的振动影响.本文结合工程实例,就爆破振动监测中的测试仪器、测点布置方式以及数据分析进行了阐述;并基于监测数据的分析,优化了现场爆破方案.实践证明:采用本文的测试仪器和测点布置方式,可有效地监测建筑物基础测点的振速;采取浅孔爆破,严格控制掏槽眼药量,增加钻眼数量和雷管段数,能很好地控制爆破振动.

It is possible to reduce the vibration effect on buildings in residential area by controlling blasting vibration due to tunneling for urban underground traffic.This paper describes the testing instrument,layout of testing points and data analysis in blasting vibration monitoring,combined with practical work;and then according to analysis of monitoring data,the on-site blasting parameters,are optimized.Practice shows that,using the testing instrument and layout of testing points can availably monitor vibration velocities of testing points at building foundations;adopting short-hole blasting,strictly controlling cutting hole dosage,increasing the number of drilling holes and detonators,can well control the blasting vibration.