本文介绍了青岛市一改造工程中“大型环体封闭楼群一次性爆破拆除”控制技术。该项目综合运用了时间差、高度差对称解体定向控制爆破技术 ,预成支点爆破法、多重闭合非电导爆管起爆网络技术 ,在没有外塌条件的情况下 ,实现了近万m2 的大型环体封闭楼群一次性控制爆破拆除。达到了内合式逐次对称倒塌的目的。 This article introduced the control technology of “disposable blasting demolition of large-scale ring-closed buildings” in the reconstruction project of Qingdao City. The project uses a combination of time-differentiated and height-difference symmetrically disassembled directional controlled blasting technology, pre-constructed fulcrum blasting method, and multi-closed non-electrical detonation detonation detonation network technology, achieving a large-scale ring body of nearly 10,000 m2 without external collapse conditions. One-time controlled blasting demolition of closed buildings. Achieved the purpose of the symmetry collapse of the internal symmetry.