钢筋砼桥墩的联合爆破法拆除

Demolition of a Reinforced Concrete Structure Bridge by Joint Blasting

一座桥梁需要拆除,对桥面板及大桥纵梁采用机械吊离,对二组桥墩采用联合爆破法拆除:桥墩横梁用浅孔爆破炸断,桥墩的主柱用深孔爆破从底部破碎,桥墩的方形桩用水下外敷药包爆破切断,爆破后机械吊起方便。重点介绍了方形桩水下外敷药包爆破的情况,给出了外敷药包药量和装药结构。

To demolish a out-of-function bridge, the bridge panel,crossbeam and piers were removed by machinery and joint blasting respectively. The crossbeam of pier was cut off by shaLlow hole blasting, the pillar of pier was broken from the bottom by deep hole blasting and the square pole was cut off by bare explosives under water which was convenient for machinery to llft. Bare explosives blasting square pole under water was discussed and the volume and structure of installation on bare explosives under water was presented.