Blasting demolition of 22-story frame building collapsing to opposite direction under complex environment
ZHANG Wenlong
WANG Yanhong
ZHENG Wenfu
YANG Zhihong
Abstract：Two 22-story frame buildings in a group of urban illegal buildings under complex environment are demolished at one time.According to the collapse distance and the characteristics of the frame building,the opposite collapse blasting demolition scheme is adopted,and the single-ladder notch is designed.Combined theory with practical experiences,blasting parameters and the height of the notch are selected after test,and the interval time between the columns is determined.Through the compound initiation network combined four-way with cluster,the two buildings are detonated 3s apart,and the segmented overall touchdown disintegration is realized.Reasonable protective measures are taken to effectively reduce the blasting and touchdown vibration,and the blasting achieved the expected effect.
Keywords：opposite collapseladder notchinterval initiationblasting demolition
Publication Date：2023-12-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 29-33 )