临近居民区爆破的现场测试分析

Analysis of Field Test of Blasting near Residential Areas

以青岛经济技术开发区某水库扩容工程爆破开挖项目为背景,对爆破产生的地震动效应及对建筑物的影响进行现场测试,同时应用IDTS3850 Seismogragh软件并结合Matlab中的FFT变换,对爆破测试数据进行综合分析。分析结果表明,爆破振动在3个方向上的振动持续时间不同;在爆破中远区,应选择爆破振动主频和3个方向的叠加速度作为爆破振动判据,该分析结果为今后的爆破设计和控制爆破开挖引起的地震动提供参考和依据。

In this paper, based on the safety monitoring of blasting-technique in the extending-dimension of reservoir in Qingdao Economic Development Zone , the ground vibration effects generated by blasting and the impact on buildings are tested on-site.At the same time, combined with the FFT transform in the Matlab , the IDTS3850 Seismogragh software is adopted to make a comprehensive analysis of the blasting test data .It is found that the duration of blasting in three directions is different and in the far district of blasting , the blasting vibration frequency should be chosen and the three direction of the stack velocity should be used as the criterion of the blasting vibration .It can be used as a reference and a basis for the future design and control of the blasting ground vibration caused by the blasting excavation .