6幢不同结构大楼的一次爆破拆除

Explosive Demolition of Six Different Structured Buildings Once Time

在城市中心环境十分复杂的情况下,一次起爆6幢5万m2的楼房,这在江苏还是第一次。这6幢楼房相距间隔不大,结构截然不同,高宽比相差较大,倒塌方向各异。6幢楼同时起爆、同时倒塌,既要把爆破地震、塌地振动控制在允许的范围内,又要合理控制网路的延时时间,使各楼着地时间错开,还要防止先爆楼房产生的飞石和冲击波破坏后爆楼房的网路。因此进行有效的预处理,合理的选择爆破参数、切口高度、起爆顺序和延时时间,并进行有效的防护是这次爆破成功的关键。

It＇s the first time ever in Jiangsu province that six buildings with a total area of 50,000 m^2 were demolished at one time under complicated down town situations. There was a little space between these six buildings,which had totally different structures,heights ,widths ,and directions to fall down. To fire them at the same time,we not only need to control blasting vibration and touehtown vibrations in permissible area,but also to control the proper delay time to stagger the buildings＇ falling down, and also to protect the network from flyrock and shock wave of the previous buildings. Thus ,effective pretreatment,reasonable blasting parameters and delay time were the keys to success.