隧道爆破振动对上方居民楼震害分析
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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。
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.
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.
引文
[1]龚思礼.建筑抗震设计[M].北京:中国建筑工业出版社,1994.
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[5]魏文晖,卢哲安.爆破地震波作用下框架结构与地基共同工作的非线性动力分析[J].世界地震工程,2004,20(2):95-100.
[6]田运生,田会礼,于亚伦,等.爆破地震波作用下民房破坏分析和破坏特征[J].爆破,2005,22(1):96-98.
[7]魏文晖,陈灿.爆破地震波作用下砌体结构的动力分析[J].爆破,2003,20(3):8-11.
[8]娄建武,龙源.工程爆破中的建筑物振动监测[J].解放军理工大学学报,2000,11(5):58-62.
[9]魏文晖,汪芳,李秀.深孔爆破对房屋结构的非线性动力反应[J].武汉理工大学学报,2006,29(9):72-75.
[10]陈泽观,林从谋.新爆破安全判据下房屋安全的监测与控制[J].西部探矿工程,2006(128):194-196.
[2]李永梅,孙国富.砌体房屋的爆破地震破坏机理和模型[J].北京工业大学学报.2001,27(1):61-63.
[3]汪芳.房屋结构在爆破地震波下的非线形动力反应分析[J].中国水运,2006,4(4):35-37
[4]陈国兴,陈忠汉,马克检,等.工程结构抗震设计原理[M].北京:中国水利水电出版社,2002:81-82.
[5]魏文晖,卢哲安.爆破地震波作用下框架结构与地基共同工作的非线性动力分析[J].世界地震工程,2004,20(2):95-100.
[6]田运生,田会礼,于亚伦,等.爆破地震波作用下民房破坏分析和破坏特征[J].爆破,2005,22(1):96-98.
[7]魏文晖,陈灿.爆破地震波作用下砌体结构的动力分析[J].爆破,2003,20(3):8-11.
[8]娄建武,龙源.工程爆破中的建筑物振动监测[J].解放军理工大学学报,2000,11(5):58-62.
[9]魏文晖,汪芳,李秀.深孔爆破对房屋结构的非线性动力反应[J].武汉理工大学学报,2006,29(9):72-75.
[10]陈泽观,林从谋.新爆破安全判据下房屋安全的监测与控制[J].西部探矿工程,2006(128):194-196.
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