钢筋混凝土地下人防工事爆破拆除

DEMOLITION OF UNDERGROUND REINFORCED CONCRETE FORTIFICATION BY BLASTING METHOD

高密度钢筋混凝土地下人防工事十分坚固 ,其周围环境复杂 ,采用控制爆破方法拆除时既要使混凝土充分破碎 ,又要避免爆破危害。为此 ,通过爆破试验确定了合理的炸药单耗 ,按照安全振速估算并限制了最大一段起爆药量 ,对不同的墙体采用不同的爆破参数。文中还介绍了防飞石的安全措施以及爆破效果。

An underground reinforced concrete fortification is very strong and has complicated surroundings.When it is demolished by controlled blasting,both full concrete fragmentation and prevention of blasting hazards are need.For these reasons,a reasonable specific charge was determined through trial blasting;the maximum charge mass per delayed interval was estimated and limited on the basis of the permitted vibration velocity and the blasting parameters were designed for different walls.In addition,the safety precautions against flying rocks and blasting results were introduced.