Efficient Blasting Demolition of Frame-shear Structure Buildings in Mountain City

Most of the buildings in the mountain city area are built on leaning the mountains, with the characteristics of uneven terrain, scattered architectural layoutscattered layout of buildings and complex surrounding environment. In a certain area of Chongqing, there are were 10 frame-shear wall structure illegal buildings with a frame-shear structure that need to be demolished. Due to the requirements of construction safety and progress, single incision directional blasting demolition is was determinedadopted. Combined withBased on related the practice experience of blasting demolition project, according to the plane position, spatial distribution characteristics and surrounding environment of 10 illegal buildings, thean corresponding overall blasting scheme is was put forward according to the plane positionlayout, spatial distribution characteristics and surrounding environment of the 10 illegal buildings. And optimizing construction organization, tThe blasting demolition task of this building group is was completed safely and efficiently in three times within 15 days under an optimizding construction organization. In view of the environmental factors such as high and steep rock slopes, valleys and scarps that which affect the collapse of the building and the blasting effect, the directional collapse of the buildings can bewere reliably guaranteed by optimizing the blasting incisions, reserving buffer layers, and rationally designing blasting parameters. Through the rational reasonable design of the partition sections and delay times of firing circuitthe initiation network, and efficient organization of the circuit connection operations, the athe reliable delay initiation of large-scale industrial electronic detonator network is was realized. Finally, the collapse accumulation range and blasting harmful effects of building arewere effectively controlled. The collapse of eEach building is was fully disintegrated, the blasting heap piles fragments arewere concentrated, and all kinds of surrounding protection objects are were safe. The engineering practice results show that the initiation network of industrial electronic detonators initiation network can meet the needs of multi-unit and multi-level large-scale initiation network, which provides an important reference for similar projects.