Design of a Five-story Brick-concrete Structure Building Demolition Scheme by Folding Blasting

Abstract

There are several schemes for controlled blasting demolition of buildings, including in-situ collapse, inward collapse, directional collapse, unidirectional collapse, and bidirectional collapse. The choice of blasting plan is mainly influenced by the structure and geometric size of the explosive, the surrounding environment, and the initiating equipment. This article designs a folding blasting demolition plan for a 5-story brick concrete structure building. Based on the structural dimensions of the building to be demolished and the surrounding environmental map. Only the south side of the building is relatively open and can provide a site for the collapse of the building, so the directional dumping blasting plan towards the south is chosen. Adopting a comprehensive protective system to eliminate or minimize blasting hazards as much as possible. This blasting adopts a hybrid blasting network with electric detonators detonating non electric detonators. Each blasting hole has one detonator, which is connected with one segment of detonator inside the hole and one segment of detonator outside the hole. After every 20 detonators are clustered together, they are connected to a double detonator to form a connection point, and then the connection points are double connected to form a blasting network.