闹市区高层建筑物爆破拆除的实践

待拆建筑物为16层高的剪力墙现浇整体结构,其高宽比较小为1.78(48∶27),一旦处理不当就会倾而不倒,而且塌落空间只有北侧的38m。经研究决定采用折叠爆破方案,向北倾倒,并运用毫秒延时起爆技术解决了倾而不倒问题。爆破结果证明,爆破方案及采取的延时技术是正确的。

PRACATICE OF BLASTING DEMOLITION OF HIGHRISE BUILDINGS IN BUSTLING DOWNTOWN AREA

The building to be demolished,a complete cast-in-situ constructed one,was in shear walls and stood at 16-stoery,and with a relative smaller ratio of height over width being 1.78(48∶27).Such a building structure plus the very limited space of only 38m in the north for its collapse was likely to leave the building inclined instead of falling if improper blasting measures were taken.Folded blasting scheme was employed after discussion by using millisecond delay blasting to direct the collapse towards the north.The blasting results proved the employment of the blasting scheme which leaved the building completely collapse in designed direction.