工程爆破

2014, v.20(02) 25-28

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建(构)筑物拆除爆破塌落触地振动预测模型研究
FORECAST MODEL OF PEAK VIBRATION VELOCITY INDUCED BY THE COLLAPSE OF STRUCTURES IN DEMOLITION BLASTING PROJECTS

孙金山;谢先启;贾永胜;姚颖康;韩传伟;
SUN Jin-shan;XIE Xian-qi;JIA Yong-sheng;YAO Ying-kang;HAN Chuan-wei;Engineering Faculty of China University of Geosciences(Wuhan);Wuhan Municipal Construction Group;

摘要(Abstract):

塌落体触地诱发的振动是建(构)筑物爆破拆除工程的主要危害,事先对其进行预测是进行工程安全评估以及确定减振措施的前提。为此,基于动量守恒理论,将触地冲击过程简化为塌落体与地表塑性区的非弹性碰撞过程,建立了简化的触地冲击力学模型,并根据振动传播规律,提出了触地振动速度的预测公式。算例表明,该模型计算精度可满足工程需要,且简便易用。
In demolition blasting projects the vibration caused by the collapse of structure is the most harmful effect.Forecasting the vibration velocity is an essential precondition of safety assessment and design of shock absorption measures.The touchdown impact process was simplified to the inelastic collision of the collapse and the plastic zone of ground.A simplified collapse compact mechanical model was established by the conservation law of momentum,and based on the propagation law of vibration a calculation formula to forecast the vibration velocity was deduced.Case study indicated the precision of this model could meet the need of the project,and easy to use.

关键词(KeyWords): 爆破拆除;塌落振动;振动速度;预测模型
Demolition blasting;Collapse vibration;Vibration velocity;Forecast model

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(41072219;51379194);; 湖北省自然科学基金资助项目(2012FFB06502)

作者(Author): 孙金山;谢先启;贾永胜;姚颖康;韩传伟;
SUN Jin-shan;XIE Xian-qi;JIA Yong-sheng;YAO Ying-kang;HAN Chuan-wei;Engineering Faculty of China University of Geosciences(Wuhan);Wuhan Municipal Construction Group;

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