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DESIGN AND IMPLEMENTATION OF DIRECTIONAL BLASTING FOR DEMOLITION OF A FIFTEEN-STOREYED OFFICE BUILDING

WU Zhong-xiong,CHENG Gui-hai,HU Yun-jin,TAN Hai-wen (Guangxi University,Nanning 530004,China)  
A fifteen-storeyed office building with frame-shear wall structure was demolished by directional blasting.In this paper,general blasting program,pretreatment and formation of blasting cut were discussed.The blasting parameters for posts,wall body and longitudinal and transverse beams were determined respectively.The blasting network was outlined.At the same time,the check of blasting and touchdown vibrations and technological measures for prevention of vibration and dust were introduced.It is proposed that a mechanical unit which can be used for demolition of shear walls in the building to be demolished should be developed so as to greatly reduce labour intensity and to improve the safety,economy and operation efficiency.
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