中心城区超高层楼群多切口折叠爆破拆除

Folding Blasting Demolition with Multiple Cuts of Super High-Rise Buildings in Central Urban Area

在超大城市中心城区密集空间内进行高层楼房的安全爆破一直是一个难题。在上海普陀中环商务区4栋百米高层楼房爆破拆除中,采用了大切口、多向折叠、一次起爆、分体塌落的爆破技术。对不同结构类型采用不同切口角度:核心筒结构39°,框架结构30°,全剪力墙公寓楼36°。同时,设计楼间、切口间、层间和同层前、后采用不同的延时形式,爆破后大楼完全按照预定的方向安全塌落,坍塌距离为16~42 m。30 m处,110 kV变电站爆破振速控制为1 cm/s,实现了既要减振又需缩小倒塌影响范围的目的。周围建筑和地下管线均无损伤。

It is always a difficult problem to ensure the safe blasting of high-rise buildings in the dense space of the central urban area of a super large city.In the blasting demolition of four 100 m high-rise buildings in Putuo Core Business District of Shanghai,blasting technologies such as large cuts,multi-directional folding,one-time initiation and split collapse were adopted.Three types of cut angles were determined:core tube structure 39°,frame structure 30°and shear wall apartment building 36°.Different delay forms between buildings,cuts,story and front and back of the same storey were designed.The buildings collapse safely in the predetermined direction after blasting,and the collapse distance is 16-42 m.Blasting vibration of 110 kV substation at 30 m was controlled by 1 cm/s.The purpose of both shock absorption and redu-cing the scope of collapse was realized.Surrounding buildings and underground pipelines were not damaged.