浅眼爆破地震波传播规律

ON THE PRINCIPLE OF PROPAGATION OF SEISMIC WAVE FROM SHORT-HOLE BLASTING

结合广州公安110综合楼深基坑浅孔爆破地震波观测,应用黏弹性岩层地震波传播的波谱分析和土层地震响应的正反问题理论,解决了近距离浅眼控爆地震波在岩土内及地表的振幅、频率和波形综合计算问题。计算表明,利用土层响应结合传递函数的波谱分析方法,可以根据实测的地表波形推算土层直至基岩面的地震动,给点爆源地震引发边坡惯性力分析提供了条件。

Combined with the monitoring of seismic wave from shorthole blasting in foundation pit of Police 110 Building in Guangzhou,the wave spectrum analysis for propagation of seismic wave in viscoelastic rock and the theory about positive and negative problems of seismic response are used for comprehensively computing amplitude,frequency and shape of blasting seismic wave in rock or soil and on ground surfaceComputing results have shown that based on measured blasting seismic wave on ground surface,the wave spectrum analysis combined seismic response of soil with transmission function is applicable for calculation of seismic wave from soil layer to the surface of base rock,providing the condition for analysis of a slope inertial force caused by a seismic focus