高层框架楼拆除爆破振动检测与分析

结合3次高层框架楼拆除爆破工程的近距离振动检测,分析了拆除爆破3个振动诱发要素——爆破振动、后坐振动和塌落振动,对各阶段的振动特点进行了比较分析。得到了定向爆破的排间合理爆破时差为0.15~0.30s,爆破振动强度主要与底层立柱的同段爆破药量相关;远处振动波的各振动元素界限不清,更像一段连续地震。

MEASUREMENT & STUDY OF BLASTING VIBRATION IN DEMOLITION OF HIGH FRAME BUILDING

Based on three measurements of vibration near the building of high frame structure in blasting demolition,the author analyzed the three causations resulting in vibration in blasting demolition of buildings,including blasting vibration,backlashing vibration and collapse & fall vibration.By comparing the characteristics of vibration,the author came to the conclusion that the reasonable delay time of row-to-row for directional blasting was 0.15～0.30s.The blasting vibration amplitude lied on the charge quantity of simultaneity blasting in base poles.The vibration of each case from far vibration wave had a blurry border,presenting a likely continuous seism wave.