复杂环境下框架结构大楼的爆破拆除

爆破拆除的钢筋混凝土框架结构大楼的周围环境比较复杂。通过试爆确定多种承重立柱的合理炸药单耗和相应的爆破参数。在保证安全的前提下，对有可能影响楼房倒塌的非承重结构做了必要的预处理。对爆破切口层的主次梁、楼梯梁以及梁柱交接处布置炮眼，采用松动控制爆破，随楼层起爆，充分保证楼房倒塌过程中结构的解体和破碎。爆破中设计了非电交叉复式起爆网络，并利用洒水车降尘，实践中取得了预期的效果。

Blasting and demolishing frame buildings in complicated environment

The reinforced concrete frame building with complicated surroundings was demolished by blasting. The bearing posts of building have multi-sections. The blasting parameters and specific charge for posts with different sections were determined through trial blasts. The non-load-bearing structure which may affect collapse of building were shut off in advance on the basis of safe construction. Some blastholes were arranged on primary and secondary beams, stairs and connections of beams and posts on blasting floors. These holes exploded with blasting floor, therefore, the structures could be break up adequately in course of building demolition. The cross duplicate non-electricity network was designed; and water spray automobile was used to eliminate dust in building blasting. The favorable effects were achieved in practice.