【摘要】 为了保证房屋安全,对地表和居民楼进行了监测,以便及时调整爆破参数。结合房屋的破坏特点与监测数据进行了分析,研究表明:隧道爆破引起地表和房屋的振动速度和频率存在差异,随着高度变化房屋振动随之减小。对爆破振动的衰减规律和房屋的响应特征进行了总结分析,得出破坏的原因是:微差爆破时间过短,波形有重叠放大现象;自振频率和爆破频率接近,有共振现象;空洞效应放大了振速;房屋年代久远。最后提出了减振的对策,对爆破有较好的控制。更多还原

【Abstract】 To guarantee building safe,the monitoring of earth’s surface and residential building was conducted to revise timely blasting parameters to reduce vibration.The characteristics of building and monitoring data were analyzed.The research showed that the vibration velocity and frequency of the earth’s surface was different from those of building and the velocity and frequency reduced with the change of building height.Then,attenuating discipline of blasting vibration and response characteristic were summed and analyzed to get the damage reason: 1) Micro different time of blast was short to lead to overlapping waveform and amplified vibration extent.2)The self-vibration frequency was near to blasting frequency to resonate in the building.3) The hollow effect amplified vibration velocity.4) The building was too old.At last,the countermeasure of reducing vibration was presented to control blasting vibration better.更多还原