特殊地形条件下爆破挤淤震动效应测试与分析

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振动与冲击 ›› 2009, Vol. 28 ›› Issue (1) : 182-185.

论文

特殊地形条件下爆破挤淤震动效应测试与分析

徐学勇汪稔吴京平孙学军

作者信息 +

Monitoring and Analysis of Vibration Effects Due to Squeezing Silt by Blasting at the Special Terrain

XU Xueyong WANG REN WU Jingping SUN Xuejun

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文章历史 +

摘要

结合特殊地形条件下爆破挤淤工程实例，进行了爆破地震效应测试与分析。结果表明：实测质点震动速度控制在规范要求的安全限度以内，拟合得到的质点震动速度衰减规律与规范提供的经验公式基本相同；爆破挤淤产生的地震波的主振频率较低，说明传播介质对地震波起到了很大的抑制作用，测点处获得的地震波高频成分衰减很快，以低频为主要成分。爆区周围建筑设施自振频率一般在10Hz以下，为避免发生共振破坏，严格控制爆破质点震动速度和加强监测是有必要的。

Abstract

This paper aims to monitor and analyze the vibration effect due to squeezing silt by blasting according to engineering example at the special terrain. Results show that the measured vibration velocity is in the safety-judging standard that norm demands, and the decay law of blasting shock wave obtained by linear regression method is mostly consistent with that of norm. At the same time, the results discover that the main vibration frequency of blasting shock wave which is due to squeezing silt by blasting is low. This means that spread medium has great decay action on shock wave, and the high frequency of shock wave measured decays quickly. Natural frequency of blasting area surroundings is on average lower than 10Hz, so in order to avoid the damage caused by resonance, it is necessary to strictly control blasting vibration velocity and increase the numbers of times of monitoring.

导出引用

徐学勇汪稔吴京平孙学军 . 特殊地形条件下爆破挤淤震动效应测试与分析[J]. 振动与冲击, 2009, 28(1): 182-185

XU Xueyong WANG REN WU Jingping SUN Xuejun　. Monitoring and Analysis of Vibration Effects Due to Squeezing Silt by Blasting at the Special Terrain[J]. Journal of Vibration and Shock, 2009, 28(1): 182-185