【摘要】 为控制和评价爆破振动对山顶建筑物影响,文章对大坪山山顶建筑进行振动监测和分析。结果表明,山顶地表掌子面前后存在空洞放大效应,在0~40 m范围内振速放大系数较大(其值约为1.5~2.0),而后逐渐变小,在40~80 m区域振速放大系数约为1.0~1.5;未成洞区地表地震波符合萨道夫斯基经验衰减规律,但成洞区地表地震波不符合萨道夫斯基公式给出的衰减规律;地震波在地表传播的振动主频主要集中在低频段,约为16~96 Hz,且主频随着距离的增加逐渐递减,但掌子面前后的主频衰减程度不同,在掌子面前面测点的主频略小于在掌子面后面测点的主频。更多还原

【Abstract】 In order to control and evaluate the impact of blasting vibration on the buildings on the hilltop,vibrations of constructions on the top of the Daping mountain are monitored and analyzed.The hilltop ground surface before and after the working surface has empty amplification,the vibration velocity magnification factor,which is about 1.5~2.0,is larger in the range of 0~40 m,and then gradually becomes smaller,and in the region of 40~80 m the velocity magnification factor is about 1.0~1.5.The seismic waves of the non-hole area surface are in line with the Sodev’s empirical formula while the seismic waves of the hole area are not.The vibration dominant frequency,which is about 16~96 Hz,is mainly concentrated in the low frequency band when the seismic waves are spreaded in the surface,and the dominant frequency gradually decreases with the increasing of the distance.However,before and after the working face the attenuation degree of the dominant frequency is different: the measuring point dominant frequency in front of the working face is slightly less than in the back of the working face.更多还原