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基于南水北调中线应急供水工程(北京段)西甘池隧洞洞口段爆破开挖的工程实践,根据爆破振动的监测数据,分析了洞口段的爆破振动特征,回归分析出隧洞洞口段地面质点振动速度的变化规律,提出了控制最大单响药量、采用毫秒延期爆破技术、不耦合装药等减振措施,有效地控制了爆破振动对周边建筑物的影响。
Based on the engineering practice of blasting excavation of Xijinchi tunnel section in the midline of South-to-North Water Diversion Project (Beijing section), the blasting vibration characteristics of the tunnel section are analyzed according to the monitoring data of blasting vibration. The variation of the vibration velocity of the ground particle at the tunnel section Law, and proposed to control the maximum single bolus dose, using millisecond delay blasting technology, uncoupled charge and other vibration reduction measures to effectively control the impact of blasting vibration on the surrounding buildings.