石拱桥爆破拆除

用控制爆破方法拆除一座长125·85m、宽11·37m的石拱桥。在爆破拆除时主要破坏其承重的桥墩、拱圈与桥墩的结合点,对各种部位的炮孔布置及装药量、单段爆破药量进行了计算和试爆,并采用分段延时起爆方法,取得了很好的爆破效果。

CONTROLLED BLASTING DEMOLITION OF STONE ARCH BRIDGE

The paper discussed a method of controlled blasting employed in demolition of a stone arch bridge with its length and width being 125.85m and 11.37m respectively.The key point for the blasting was to destroy its pier and the joint between the pier and arch.Allocation of the boreholes at different location plus its charge loading,and charge quantity in single blasting were calculated out.The blasting was tested in the way of partition delay detonation.Positive blasting effect was achieved.