响应速度安全判据在爆破振动分析中的应用

针对实测民房基础处的质点振动速度峰值已超过爆破安全规程规定的安全允许振速,而没有引起建筑物破坏的实际情况,采用基于爆破振动3要素和建筑物对不同频率爆破振动信号选择放大作用的爆破振动综合评价指标响应速度安全判据方法对实测信号进行分析,分析表明:采用该方法更接近于实际情况,较速度-频率的双因素安全判据更为有效。此分析很好的解决了实际工程问题,也为响应速度安全判据阈值的确定积累了数据。

Application of Response Rate as Safety Criteria in Analyses of Blasting Vibration

Aiming at the phenomenon that the peak value of blasting vibration velocity overran one which is allowed by security regulations,but not causing the damage of buildings,response rate,a integrative evaluation index of blasting vibration based on the three factors of blasting vibration and the selective magnifying function of buildings on blasting vibration signals with different frequencies,was used as safety criteria and to analyze the measured signals.The analysis showed that this method was closer to the practice,and the response rate is more effective than the two-factor(velocity-frequency) safety criteria.The analysis solved actual engineering problems,and also accumulated data for threshold ascertainment of response rate safety criteria.