【摘要】 根据泉厦高速公路扩建工程大坪山隧道爆破山顶房屋的爆破振动数据,分析振速沿楼层传播的分布规律,研究小净距隧道爆破地震波在山顶石砌房屋楼层的传播规律及其特性.同时,应用小波包理论分析,得出爆破地震波频谱特性、主振频率及能量分布随楼层变化规律.研究结果表明,楼房3层振速出现高程放大效应,第1水平振速与垂向振速的比值大于其上两层的比值;各楼层主频主要集中在低频段,其他频率段频率成分不丰富,并且随着爆源距离和楼层的增加,频率有逐渐递减的趋势,但在第3层的各分量主频有一定程度的提高;山顶房屋的振动能量分布较广,但3个方向能量都主要集中在第1频带,且竖向能量最大,径向能量次之,切向能量最小.更多还原

【Abstract】 According to the hilltop building vibration data in Da Ping mountain tunnel blasting,the distribution of vibration velocity spreading along the different floors is analyzed,the spectral characteristic,main vibration frequency and energy distribution along floor are obtained by wavelet package theory.It′s found: on the third floor,vibration velocity appears elevation amplification effect,the ratio of the horizontal vibration velocity to vertical velocity on the ground floor is greater than the one on upper two floors;the main frequency on every floor is dominantly in the low frequency,the frequency components in other frequency-band is small,and with the increases of explosive distance and the floor number,the frequency has the trend to decrease gradually,but every component main frequency on the third floor increases to a certain degree;the vibration energy distributes widely in the hilltop building,however,the energy in three directions are mainly concentrated in the first frequency band,the rank of energy from large to small is: vertical energy,radial energy,tangential energy.更多还原