控制爆破拆除八层框架结构楼群

介绍了运用控制爆破技术拆除深圳市新光牛奶公司三栋八层框架结构楼群的爆破方案、钻孔和装药参数的选择。由于建筑群距变电站、石厦中学、众孚小学及街道、民房较近，加之拆除的建筑物面积达２万多平方米，因而对爆破震动、塌落震动和爆破飞石等的控制要求较高。作者通过孔内、孔外延时起爆技术使楼房逐排逐跨下落，有效地降低了爆破震动和建筑物大面积塌落时引起的冲击震动。文中还详细地介绍了爆破拆除高层框架结构楼房的施工方法和技巧及控制爆破飞石的有效措施。

DEMOLISHING A GROUP OF BUILDINGS WITH EIGHT-STOREY FRAME USING CONTROLLED BLASTING METHOD

In this paper,the selection of drilling and charging parameters and the blasting plans in demolishing three buildings with a eight storey frame of Xinguang Milk Company in Shenzhen City using the controlled blasting method is briefly intro ducedAs the buildings demolished are near a transformer,Shixia Middle School,Zhongfu Primary School,streets and other living buildings and the area of buildings demolished is more than 20000m2,controlling the vibration of blasting and collapsing and the flying stone is very importantThe authors try to reduce effectively the vibration of blasting and the collapsing using the skill of delay ignition in the hole and out of the holeThe method and the skill demolishing the high storey frame buildings using controlled blasting and the protection method to control the flying stone due to blasting