十五层多边形框剪大楼的爆破拆除

十五层多边形框剪大楼采用定向折叠爆破方案拆除。介绍了上、下爆破缺口的布置、不同断面形状立柱的布孔方式和药包布置、坚固的剪力墙的预处理。讨论了不同立柱的炸高和炸药单耗的确定。根据所确定的爆破缺口高度 ,对大楼倒塌的可靠性进行了校核。此外 ,针对楼体高度大、需重点保护的玻璃幕墙 ,对防飞石的措施、爆破震动和塌落震动进行了评估

BLASTING DEMOLITION OF A FIFTEEN-STOREYED AND POLYGONAL BUILDING WITH FRAME-SHEAR WALL

By use of directional and folded blasting,a fifteen-storeyed and polygonal building with frame-shear wall was demolished.The arrangement of upper and bottom blasting cuts,the drilling and charging patterns for the columns with different sectional shapes,and the pretreatment of strong shear wall were introduced.The determination of blasting heights and specific charges for varied columns was discussed.On the basis of the determined height of blasting cut,check on the reliability of building collapse was made. In addition, the precautions ^against) flying rocks and blasting and collapsing vibrations were appraised in the light of higher building and the glassy curtain wall needing to be protected emphatically.