复杂环境条件下“八字形”楼房的爆破拆除

Complex Environment "eight-shaped" Demolition of Buildings

江西洪都钢厂厂区内1栋12层高楼房进行爆破拆除,周边环境较为复杂。且该楼结构呈"八字形",立柱在倾倒方向上的排列位置不规则。为了减少大楼倒塌后产生的后座对周边的影响,采取在最后1排立柱一侧距地1.5 m处切断钢筋、大楼两端的4根立柱降低炸高、在第6～7层实施松散爆破、延长最后一响起爆时间等技术措施,达到了大楼部分折叠、缩短倒地塌落长度、减弱塌落振动危害效应的效果。

Jiangxi Hongdu steel plant in the region a 12-storey building for blasting,the surrounding environment is more complex. This building and the structure was ＂eight-shaped＂ column in the alignment direction dumping irregular. In order to reduce the back of the building collapse resulting from the impact on the surrounding, to take one side in the last row of column cut off the bar at 1.5m from the ground,the building columns at both ends of the four lower standoff, the implementation of the loose layer 6 -7 burst extend the time of the last explosion sounded technical measures, to the building section collapsed, fell to the ground to shorten the length of collapse, collapse reduced the effect of vibration harmful effects.