数值模拟在基岩负挖爆破振动效应研究中的应用

介绍了两座砖结构烟囱的爆破拆除,其特点是两座烟囱处于两库房与简易工棚包围中,环境比较复杂,场地狭窄,控制定向倒塌精度要求高。施工中通过精确确定倒塌中心线和严格控制保留部分的对称性,爆破取得预期效果,周围建筑物和设施安全无损。

APPLICATION OF DIRECTIONAL BLASTING TECHNOLOGY TO DEMOLITION OF A COOLING TOWER

This paper presented a high thin-wall hyperbolic reinforced concrete cooling tower in the power plant demolished by directional collapsing blasting.The characteristics of cooling towe are small height-to-width ratio,low gravity center and large base diameter.Its environment is complex.A lot of buildings and structures need to protect around the tower.The blasting scheme adopted low position and large size blasting cuts,pre-opening the directional window and positioning groove.The highly reliable non-electric delay initiation network combined cross connection with group units is selected.Passive and enhanced protective measures are taken.The blasting achieved better results in accurate direction,safety operation and proper fragmentation size.The experience may provide reference for the similar project.