DEMOLITION OF A HIGHRISE CLOSE TO A BUILDING TO BE PROTECTED BY DIRECTIONAL BLASTING
ZHAO Zhou-neng~1, CHENG Gui-hai~1, ZHANG Jian-ping~2(1.Guangxi University,Nanning,Guangxi 530004,China; 2.Department of Biological and Engineering,Guangxi University of Technology,Liuzhou,Guangxi 545006,China)
Because the distance between a highrise to be demolished by directional blasting and a building to be protected is only 20 centimeters,the recoil of the highrise on its collapsing must be put under control. For this reason,the highrise is divided into two separated buildings by means of manual pretreatment,and the collapsing of two buildings is made successively with controlled blasting.At the same time,some technological measures are taken,thus avoiding the recoil of the highrise in blasting procedure. These measures include the pretreatment of shear walls in blasting cut,the forward moving of rear support-point and the rise of cut location for the building to be later blasted,the selection of reasonable delayed time and so on. In addition,the safety precautions in blasting demolition of highrises are discussed.
【CateGory Index】： TU746.5