CAJ | 학술논문

近区工程爆破将对周围建（构）筑物产生不利影响，而爆破振动的破坏作用又与振动强度、频率以及结构自身的振动特性等综合因素有关。利用连续S变换对某浆砌块石单曲拱坝的坝基爆破振动速度信号进行分析，提取X、Y、Z三个方向速度信号的时频分布特征。结果表明S变换对爆破振动信号有较好的时频分辨率。最后采用质点峰值振动速度、瞬时能量谱和持续时间等指标对坝体的安全性进行评价，认为该大坝处于安全状态。
근구공정폭파장대주위건（구）축물산생불리영향，이폭파진동적파배작용우여진동강도、빈솔이급결구자신적진동특성등종합인소유관。이용련속S변환대모장체괴석단곡공패적패기폭파진동속도신호진행분석，제취X、Y、Z삼개방향속도신호적시빈분포특정。결과표명S변환대폭파진동신호유교호적시빈분변솔。최후채용질점봉치진동속도、순시능량보화지속시간등지표대패체적안전성진행평개，인위해대패처우안전상태。
Construction-induced vibration may produce potential damage to the surrounding infrastructure, and comprehen-sive factors (e.g., vibration magnitude, frequency, duration, and structural characteristics) affect the damage.Bedrock vibration velocity recordings of a stone masonry arch dam caused by blasting are analyzed using the continuous S transform. Time-frequency characteristic of the recordings in three directions ( i.e., X-Y-Z) is extracted.The results show that the S transform has a high time-frequency resolution in processing blasting vibration signal.Finally, peak particle veloci-ty, instantaneous energy spectrum, and blasting duration are adopted to evaluate the safety of the dam.It is concluded that the dam is safe.