减震沟深度对塌落振动影响的试验研究

摘要

Collapse vibration constitutes as a main form in constructions demolition blasting, digging vibration-isolating slot is effective for reducing collapse vibration. By imitating the collapse of concrete blocks, we carry out the falling of constructions demolition blasting and collect collapse vibration signals resulted from it. We analyzed damping effects of vibration-isolating slot at different depths. Results showed that damping effects increased with the depth of vibration-isolating slot, when depth reaches to a certain value, damping effects will reduce.%塌落振动是建筑物在拆除爆破中存在的主要形式，开挖减震沟是降低塌落振动地震效应的有效措施。利用混凝土块的倾倒来模拟建筑物爆破拆除的倾倒塌落过程，并采集由此产生的塌落振动信号[1]。分析研究了不同深度减震沟的减震效果。试验结果表明：减震效果随着减震沟深度的增加而增加；当深度达到一定数值后，减震效果减弱。