17-storey building fold blasting demolition and safety technology

This paper describes the successful experience of the directional blasting demolition of 17-storey frame shear wall structure building, and it analyzes and elucidates the blasting program determination, the pre-demolition and treatment, the burst altitude selection, detonating network and blasting safety technology. To dig the damping ditch, to pile up the sandbags buffer layer, and to use the detonation technology of the one-way fold blasting technology and hole inside millisecond delay combining with hole outside millisecond delay, can effectively shorten the collapse length, reduce the slump vibration, reduce heap ballast height, and reduce the blasting hazards. It can be a reference for blasting demolition of shear wall structure building under similar complex conditions, and it can be generalized in similar projects.