摘要
为研究爆破荷载作用下高速公路既有隧道的动力特性,本文根据小净距隧道开挖爆破振动监测数据,应用小波包理论分析了爆破地震波沿既有隧道传播过程中的频谱及能量变化规律。得出了爆破地震波沿既有隧道传播过程中频谱特性、主振频率和能量随距离变化规律、不同频带上的振动速度峰值和能量变化规律。研究成果对进一步研究高速公路既有隧道的动力稳定性具有重要意义。
On the basis of the vibration monitoring data, the dynamic characteristic of the high rock slope under blasting loads was researched. The wavelet packet theory was applied to analyze the spectrum and energy transformation law of the quake wave caused by blasting spreading along the rock slope. The frequency spectrum feature, main vibration frequency and energy distribution according to the distance, peak particle velocity in different spectrum-band, energy distribution law in the spreading of the blasting quake wave along the rock slope were concluded. The conclusions are very significant for the further study on the dynamic stability of the high rock slope.
出处
《煤矿爆破》
2009年第3期1-4,共4页
Coal Mine Blasting
基金
福建省自然科学基金资助项目(2006J0445)
福建省科技重点课题(2007H0055)
关键词
岩石边坡
爆破振动
小波包分析
频谱分析
能量分布
high rock slope
blasting vibration
wavelet packet analysis
spectrum analysis
energy distribution
