三门核电土石方工程中深孔爆破法的应用

浙江三门核电平基工程中采用深孔台阶爆破进行土石方开挖,对底板的平整度和完整性有很高的要求,超挖不得超过20cm,不容许欠挖。为此,根据可爆性对开挖区内的岩石进行分级,分别采用不同的钻爆参数,同时采取了预留保护层爆破、无超深爆破、底部空气间隔装药等技术措施,确保了底板的开挖质量。

CURRENT SITUATION OF DEMOLISHING URBAN STRUCTURES WITH CONTROLLED BLASTING AT HOME AND ABROAD

Current situation of demolishing urban high^rising structures by controlled blasting is systematically summarized and the deficincy of controlled blasting as a main measure to demolish the highrising structures by controlled blasting is systematically summarized and the deficincy of controlled blasting as a main measure to demolish the high^rising construction pointed out in this paper.