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DEMOLITION OF 17-STOREYED COMPLEX OFFICE BUILDING BY DIRECTIONAL BLASTING

QI Shi-fu 1, HU Liang-xiao 2, LI Shang-hai 2 (1 Engineering Institute,Engineering Corps,University of Science and Technology,PLA , Nanjing 210007,China; 2 Haerbin Hengguan blasting Engineering Limited Corp ,Haerbin 150036,China)  
A 17-storeyed complex office building with reinforced concrete frame structure was demolished by directional controlled blasting In this paper,the blasting scheme,pretreatment and the stability check of the pretreated building were introduced The position,height and extent of blasting and the check of tipping reliability were expatiated Besides,the parameters of blast-hole and charges,blast-hole layout,charge structure,priming circuit and blasting sequence,analysis of blasting safety and other technological measures were presented
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