Application of V-shaped blasting technology in the demolition blasting of buildings under complex environment
In view of the situation that Teng Pengfei 12-story illegal building first floor is a frame shear wall,the second to the 12-story illegal building is a frame structure,and the surrounding environment is complex,and the scope of collapse is limited,it is decided to design a 10 m high blasting cut,and the directional collapse is to the south.By means of mechanical pre-demolition of the first floor shear wall,retaining the shear wall under the crossbeam and changing the wall into a column,the blasting cut height and the blasting parameters of the wall and column for each floor are reasonably determined.In order to avoid the harmful effects of blasting have a safety impact on the east side of the house under construction and the north side of the wooden house,the initiation network used a v-shaped network of electronic detonators that ring first on each side and then on the other;the delay time should be set reasonably before each detonator enters the hole and multi-layer protective measures are adopted for blasting walls and columns;through careful design and construction,building collapse in turn according to the design requirements and the blasting damage effect is effectively controlled,which can provide experience for similar projects.
万方数据
维普
