牙拉河铁路大桥爆破拆除

Demolition of Ya-la-he Railway Great Bridge by Blasting

介绍了牙拉河铁路大桥爆破拆除的主要设计原则和爆破参数的确定方法。根据大桥的结构特点,采取相应的爆破方案,充分利用了桥梁失稳后在其自重作用下的解体破碎效应,不仅减少了钻孔数量,而且也降低了炸药单耗,取得了良好的爆破效果。

The mainly design principle and determined means of blasting parameters in demolition of Ya-la-he railway great bridge are introduced. According to characteristics of the bridge＇s structure, a reasonable blasting program was used,the bridge was disintegrated and smashed by fully utilizing the dead weight when the bridge lost its stability, so that the borehole number was cut down and amount of consumed explosives was reduced; good results of blasting have been achieved.