爆破拆除高耸建筑物触地危害分析与控制

Harm Analysis of Collapse and Touchdown of Tower Buildings in Demolition Blasting and Its Control Measures

分析爆破拆除高耸建筑物倒塌触地产生的危害:触地震动、触地飞石和超压气流。基于一般塌落质点振动速度公式,提出3种减少震动危害的措施;根据抛体运动规律,得出触地飞石水平飞行范围,提出3种减少触地飞石危害的措施;在分析超压气流危害机理的基础上,提出了3种减少超压气流危害的措施。并引用实例进行分析说明。

The harms of touchdown vibration,touchdown rock and hyperpressure airflow resulted from collapse and touchdown of tower building in demolition blasting are analyzed.Three methods to decrease the touchdown vibration are put forward based on the formula for particles＇ vibration speed when collapsing.According to projectiles motion law,the flying distance of touchdown rocks in horizontal direction is deduced and three methods to decrease the touchdown rocks＇ harm are put forward.Three measures are put forward to decrease the harm of hyperpressure air flow based on the harm mechanism of hyperpressure air flow.Lastly,an example is quoted for the further analysis and explanation.