爆心距对爆破震动信号频谱的影响分析
摘要:结合临沂某一隧洞工程,利用matlab分析软件分析了不同爆心距下的爆破震动信号的频谱变化情况。得出:在爆破中近区,震动信号的主频在垂直方向的分量较水平方向大,随着爆心距的增加地面震动峰值速度的主震方向会由水平方向向垂直方向转化,总体呈衰减趋势,震动主频趋向于低频;在爆破参数和爆区特征类似于本工程的工程爆破现场其中低频震动信号在水平方向上的分量所占能量比例高于垂直分量的能量比例,在距爆源较远的位置也不能忽略爆破震动对建筑结构的影响,尤其是要加强水平方向的抗震设防。
Abstract:Combined with a Tunnel Engineering in Linyi City,the spectrum changing situation of vibration signal at different distances from explosive source was analyzed through the analysis software MATLAB. It can be obtained that,in the medium and near-field of blasting source,the vertical component of the dominant frequency of vibration signal is larger than that in horizontal direction and the main vibration direction of ground vibration's peak velocity may change from horizontal direction to vertical direction with the increase of the distance from explosive source,and the overall trend decreases with vibration dominant frequency tending to low frequency. In engineering blasting site similar to this engineering in blasting parameters and features of the blasting region,the energy proportion of the horizontal component of vibration signal with low frequency is higher than that of the vertical component,and the impact of blasting vibration on building structures also can not be neglected even at the position far from the blasting source;in particular,seismic fortification in horizontal direction should be enhanced.
中文标题：
爆心距对爆破震动信号频谱的影响分析
Analysis of the Impact of Distance From Explosive Source on Blasting Vibration Signal Spectrum
作者：
毕卫国,田岗,燕永峰
Bi Weiguo,Tian Gang,Yan Yongfeng
作者简介:毕卫国,1960年生,山东科技大学爆破研究所所长,硕士研究生导师,主要从事爆破理论与应用、防灾减灾与防护工程方面的研究。
通讯地址：
山东省土木工程防灾减灾重点实验室(山东科技大学), 山东青岛 266590
ShandongProvincialKeyLaboratoryofCivilEngineeringDisasterPreventionandMitigation(SDUST),Qingdao266510,ShandongChina
中图分类号:X45
doi:10.3969/j.issn.1007-2993.2011.06.008
出版物：岩土工程技术
收稿日期:2011-09-21
关键词:竖井,爆破震动,震动监测,爆心距,频谱分析,小波分析
Key words:shaft,blasting vibration,vibration monitoring,distance from explosive source,spectrum analysis,wavelet analysis
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基金项目：
基金项目: 山东省土木工程防灾减灾重点实验室基金
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